./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --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 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 18:46:21,806 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:46:21,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:46:21,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:46:21,851 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:46:21,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:46:21,867 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:46:21,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:46:21,868 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:46:21,868 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:46:21,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:46:21,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:46:21,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:46:21,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:46:21,871 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:46:21,871 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:46:21,871 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:46:21,871 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:46:21,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:46:21,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:46:21,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:46:21,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:46:21,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:46:21,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:46:21,873 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:46:21,874 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:46:21,874 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:46:21,874 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:46:21,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:46:21,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:46:21,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:46:21,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:46:21,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:46:21,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:46:21,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:46:21,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:46:21,877 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:46:21,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:46:22,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:46:22,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:46:22,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:46:22,080 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:46:22,080 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:46:22,081 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-09-17 18:46:23,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:46:23,400 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:46:23,401 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-09-17 18:46:23,408 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bacb3657e/80f9f5a874b64e46b30e3924c3fd07ba/FLAG957beb940 [2024-09-17 18:46:23,805 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bacb3657e/80f9f5a874b64e46b30e3924c3fd07ba [2024-09-17 18:46:23,807 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:46:23,808 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:46:23,809 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:46:23,809 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:46:23,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:46:23,818 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:23,818 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d0368a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23, skipping insertion in model container [2024-09-17 18:46:23,818 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:23,833 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:46:23,934 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/egcd2-ll_valuebound10.c[490,503] [2024-09-17 18:46:23,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:46:23,954 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:46:23,962 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/egcd2-ll_valuebound10.c[490,503] [2024-09-17 18:46:23,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:46:23,987 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:46:23,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23 WrapperNode [2024-09-17 18:46:23,988 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:46:23,989 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:46:23,989 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:46:23,989 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:46:23,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:23,999 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,010 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:46:24,010 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:46:24,011 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:46:24,011 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:46:24,011 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:46:24,018 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,024 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,041 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-17 18:46:24,042 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,042 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,044 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,053 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,054 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:46:24,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:46:24,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:46:24,058 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:46:24,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (1/1) ... [2024-09-17 18:46:24,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:46:24,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:24,086 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 18:46:24,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 18:46:24,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:46:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-17 18:46:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-17 18:46:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:46:24,121 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:46:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:46:24,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:46:24,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:46:24,123 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:46:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:46:24,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:46:24,124 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:46:24,174 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:46:24,176 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:46:24,362 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-17 18:46:24,362 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:46:24,376 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:46:24,376 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:46:24,376 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:46:24 BoogieIcfgContainer [2024-09-17 18:46:24,376 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:46:24,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:46:24,381 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:46:24,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:46:24,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:46:23" (1/3) ... [2024-09-17 18:46:24,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166afc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:46:24, skipping insertion in model container [2024-09-17 18:46:24,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:46:23" (2/3) ... [2024-09-17 18:46:24,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7166afc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:46:24, skipping insertion in model container [2024-09-17 18:46:24,387 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:46:24" (3/3) ... [2024-09-17 18:46:24,388 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-09-17 18:46:24,400 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:46:24,400 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:46:24,434 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:46:24,438 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b5f447f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:46:24,438 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:46:24,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:46:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-17 18:46:24,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:24,448 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:24,449 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:24,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:24,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-17 18:46:24,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:24,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595005923] [2024-09-17 18:46:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:24,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:46:24,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:46:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:46:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:46:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:46:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:46:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:46:24,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,647 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:46:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595005923] [2024-09-17 18:46:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595005923] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:46:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:46:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 18:46:24,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742504107] [2024-09-17 18:46:24,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:46:24,654 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-17 18:46:24,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-17 18:46:24,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:46:24,674 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:46:24,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:24,704 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-17 18:46:24,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-17 18:46:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-17 18:46:24,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:24,711 INFO L225 Difference]: With dead ends: 70 [2024-09-17 18:46:24,712 INFO L226 Difference]: Without dead ends: 34 [2024-09-17 18:46:24,714 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-17 18:46:24,718 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:24,718 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:46:24,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-17 18:46:24,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-17 18:46:24,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:46:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-17 18:46:24,753 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-17 18:46:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:24,754 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-17 18:46:24,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-17 18:46:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:24,758 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-17 18:46:24,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 18:46:24,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:24,759 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:24,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:46:24,760 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:24,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:24,760 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-17 18:46:24,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:24,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631690695] [2024-09-17 18:46:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:46:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:46:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:46:24,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:46:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:24,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:46:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:25,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:46:25,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:25,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:46:25,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:46:25,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:25,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631690695] [2024-09-17 18:46:25,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631690695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:25,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330485167] [2024-09-17 18:46:25,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:25,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:25,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:25,032 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:25,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:46:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:25,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 18:46:25,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:25,281 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 18:46:25,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:25,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330485167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:25,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:46:25,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-17 18:46:25,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501944588] [2024-09-17 18:46:25,413 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:25,413 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 18:46:25,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 18:46:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:46:25,416 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-17 18:46:25,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:25,631 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-17 18:46:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:46:25,632 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-17 18:46:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:25,633 INFO L225 Difference]: With dead ends: 55 [2024-09-17 18:46:25,634 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 18:46:25,634 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:46:25,636 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:25,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:46:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 18:46:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-17 18:46:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:46:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-17 18:46:25,649 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-17 18:46:25,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:25,649 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-17 18:46:25,649 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-17 18:46:25,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-17 18:46:25,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 18:46:25,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:25,653 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:25,666 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:46:25,857 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:25,858 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:25,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-17 18:46:25,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:25,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311048271] [2024-09-17 18:46:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:25,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:25,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:25,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470956161] [2024-09-17 18:46:25,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:25,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:25,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:25,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:25,894 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:46:25,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:25,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:46:25,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:46:25,957 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:46:25,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:25,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311048271] [2024-09-17 18:46:25,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:25,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470956161] [2024-09-17 18:46:25,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470956161] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:46:25,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:46:25,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:46:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361875057] [2024-09-17 18:46:25,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:46:25,959 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:46:25,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:25,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:46:25,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:46:25,960 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 18:46:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:26,002 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-17 18:46:26,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:46:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-17 18:46:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:26,003 INFO L225 Difference]: With dead ends: 65 [2024-09-17 18:46:26,003 INFO L226 Difference]: Without dead ends: 63 [2024-09-17 18:46:26,003 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:46:26,004 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:26,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:46:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-17 18:46:26,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-17 18:46:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:46:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-17 18:46:26,021 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-17 18:46:26,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:26,022 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-17 18:46:26,022 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-17 18:46:26,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-17 18:46:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 18:46:26,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:26,023 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:26,039 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:46:26,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:26,224 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-17 18:46:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443411852] [2024-09-17 18:46:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:26,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656104815] [2024-09-17 18:46:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:26,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:26,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:26,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:46:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:26,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:46:26,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:46:26,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:46:26,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443411852] [2024-09-17 18:46:26,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:26,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656104815] [2024-09-17 18:46:26,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656104815] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:46:26,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:46:26,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:46:26,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137238555] [2024-09-17 18:46:26,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:46:26,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:46:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:46:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:46:26,380 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:46:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:26,423 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-17 18:46:26,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:46:26,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-17 18:46:26,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:26,429 INFO L225 Difference]: With dead ends: 61 [2024-09-17 18:46:26,429 INFO L226 Difference]: Without dead ends: 59 [2024-09-17 18:46:26,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:46:26,431 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:26,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:46:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-17 18:46:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-17 18:46:26,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:46:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-17 18:46:26,448 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-17 18:46:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:26,448 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-17 18:46:26,449 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-17 18:46:26,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:26,449 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-17 18:46:26,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-17 18:46:26,452 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:26,452 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:26,466 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 18:46:26,653 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:26,653 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:26,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:26,654 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-17 18:46:26,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:26,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622165986] [2024-09-17 18:46:26,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:26,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:26,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:26,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [558560151] [2024-09-17 18:46:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:26,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:26,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:26,682 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:26,683 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:46:26,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:26,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:46:26,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-17 18:46:26,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:46:26,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:26,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622165986] [2024-09-17 18:46:26,823 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:26,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558560151] [2024-09-17 18:46:26,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558560151] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:46:26,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:46:26,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:46:26,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498387626] [2024-09-17 18:46:26,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:46:26,824 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:46:26,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:26,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:46:26,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:46:26,826 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-17 18:46:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:26,904 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-17 18:46:26,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:46:26,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-17 18:46:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:26,905 INFO L225 Difference]: With dead ends: 65 [2024-09-17 18:46:26,906 INFO L226 Difference]: Without dead ends: 63 [2024-09-17 18:46:26,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:46:26,906 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:26,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:26,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-17 18:46:26,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-17 18:46:26,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:46:26,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-17 18:46:26,923 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-17 18:46:26,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:26,923 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-17 18:46:26,924 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-17 18:46:26,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-17 18:46:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-17 18:46:26,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:26,926 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:26,938 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:46:27,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:27,126 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:27,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-17 18:46:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:27,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968623402] [2024-09-17 18:46:27,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:27,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1744022513] [2024-09-17 18:46:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:27,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:27,143 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:27,144 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:46:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-17 18:46:27,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:27,269 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:46:27,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:46:27,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968623402] [2024-09-17 18:46:27,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744022513] [2024-09-17 18:46:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744022513] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:46:27,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:46:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-17 18:46:27,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196251088] [2024-09-17 18:46:27,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:27,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:46:27,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:27,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:46:27,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:46:27,350 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-17 18:46:27,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:27,444 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-17 18:46:27,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:46:27,444 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-17 18:46:27,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:27,447 INFO L225 Difference]: With dead ends: 90 [2024-09-17 18:46:27,447 INFO L226 Difference]: Without dead ends: 88 [2024-09-17 18:46:27,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:46:27,448 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:27,449 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-17 18:46:27,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-17 18:46:27,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:46:27,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-17 18:46:27,467 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-17 18:46:27,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:27,468 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-17 18:46:27,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-17 18:46:27,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:27,468 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-17 18:46:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-17 18:46:27,471 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:27,471 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:27,485 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:27,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:46:27,676 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:27,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:27,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-17 18:46:27,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:27,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583519700] [2024-09-17 18:46:27,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:27,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:46:27,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:46:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:46:27,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:46:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:46:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:46:27,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:46:27,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:46:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:46:27,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:46:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:46:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-17 18:46:27,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583519700] [2024-09-17 18:46:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583519700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:27,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281614949] [2024-09-17 18:46:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:27,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:27,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:27,870 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:27,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:46:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:27,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-17 18:46:27,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-17 18:46:27,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-17 18:46:28,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281614949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:46:28,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:46:28,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-17 18:46:28,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398442168] [2024-09-17 18:46:28,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:28,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-17 18:46:28,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:28,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-17 18:46:28,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:46:28,030 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-17 18:46:28,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:28,171 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-17 18:46:28,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:46:28,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-17 18:46:28,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:28,174 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:46:28,174 INFO L226 Difference]: Without dead ends: 97 [2024-09-17 18:46:28,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:46:28,175 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:28,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:28,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-17 18:46:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-17 18:46:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-17 18:46:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-17 18:46:28,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-17 18:46:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:28,201 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-17 18:46:28,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-17 18:46:28,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:28,202 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-17 18:46:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-17 18:46:28,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:28,203 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:28,215 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:28,403 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:28,404 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:28,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-17 18:46:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:28,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364841909] [2024-09-17 18:46:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:28,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297900706] [2024-09-17 18:46:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:28,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:28,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:28,425 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:28,426 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:46:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:28,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-17 18:46:28,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-17 18:46:28,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:28,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364841909] [2024-09-17 18:46:28,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:28,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297900706] [2024-09-17 18:46:28,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297900706] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:28,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:28,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-17 18:46:28,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930681502] [2024-09-17 18:46:28,606 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:28,607 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:46:28,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:46:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:46:28,607 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-17 18:46:28,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:28,699 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-17 18:46:28,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:46:28,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-17 18:46:28,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:28,701 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:46:28,701 INFO L226 Difference]: Without dead ends: 120 [2024-09-17 18:46:28,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-17 18:46:28,702 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:28,702 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:28,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-17 18:46:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-17 18:46:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-17 18:46:28,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-17 18:46:28,724 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-17 18:46:28,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:28,725 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-17 18:46:28,725 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-17 18:46:28,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:28,725 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-17 18:46:28,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 18:46:28,726 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:28,726 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:28,739 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:46:28,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:28,931 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:28,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:28,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-17 18:46:28,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:28,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387967337] [2024-09-17 18:46:28,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:28,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:28,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1049569291] [2024-09-17 18:46:28,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:46:28,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:28,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:28,945 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:28,946 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:46:28,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:46:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:28,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-17 18:46:28,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-17 18:46:29,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:29,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:29,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387967337] [2024-09-17 18:46:29,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:29,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049569291] [2024-09-17 18:46:29,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049569291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:29,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:29,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-17 18:46:29,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738208671] [2024-09-17 18:46:29,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:29,213 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:46:29,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:29,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:46:29,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:46:29,213 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:46:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:29,333 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-17 18:46:29,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:46:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-17 18:46:29,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:29,335 INFO L225 Difference]: With dead ends: 129 [2024-09-17 18:46:29,335 INFO L226 Difference]: Without dead ends: 127 [2024-09-17 18:46:29,335 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:46:29,335 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:29,336 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:29,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-17 18:46:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-17 18:46:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-17 18:46:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-17 18:46:29,365 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-17 18:46:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:29,365 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-17 18:46:29,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-17 18:46:29,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-17 18:46:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-17 18:46:29,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:29,367 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:29,380 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:46:29,570 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:29,571 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-17 18:46:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755140098] [2024-09-17 18:46:29,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:29,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:29,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:29,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173964057] [2024-09-17 18:46:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:46:29,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:29,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:29,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:29,590 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:46:29,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:46:29,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:29,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-17 18:46:29,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:30,306 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-17 18:46:30,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:42,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755140098] [2024-09-17 18:46:42,628 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:42,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173964057] [2024-09-17 18:46:42,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173964057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:42,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:42,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:46:42,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313045911] [2024-09-17 18:46:42,628 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:42,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:46:42,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:42,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:46:42,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-17 18:46:42,629 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-17 18:46:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:42,960 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-17 18:46:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:46:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-17 18:46:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:42,961 INFO L225 Difference]: With dead ends: 133 [2024-09-17 18:46:42,961 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 18:46:42,962 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-17 18:46:42,962 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:42,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:46:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 18:46:42,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-17 18:46:42,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-17 18:46:42,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-17 18:46:42,983 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-17 18:46:42,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:42,984 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-17 18:46:42,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-17 18:46:42,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:42,984 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-17 18:46:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-17 18:46:42,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:42,985 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:42,998 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:43,189 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 18:46:43,190 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:43,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-17 18:46:43,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:43,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287563766] [2024-09-17 18:46:43,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:43,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:43,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1210153178] [2024-09-17 18:46:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:43,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:43,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:43,206 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:43,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:46:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:43,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-17 18:46:43,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-17 18:46:43,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-17 18:46:44,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287563766] [2024-09-17 18:46:44,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210153178] [2024-09-17 18:46:44,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210153178] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:46:44,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:46:44,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-17 18:46:44,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649254150] [2024-09-17 18:46:44,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:44,278 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:46:44,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:46:44,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:46:44,278 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:46:46,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:46,618 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-17 18:46:46,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:46:46,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-17 18:46:46,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:46,621 INFO L225 Difference]: With dead ends: 229 [2024-09-17 18:46:46,621 INFO L226 Difference]: Without dead ends: 225 [2024-09-17 18:46:46,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:46:46,622 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:46,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-17 18:46:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-17 18:46:46,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-17 18:46:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-17 18:46:46,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-17 18:46:46,689 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-17 18:46:46,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:46,689 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-17 18:46:46,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:46:46,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:46,689 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-17 18:46:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-17 18:46:46,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:46,690 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:46,702 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:46,890 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 18:46:46,890 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-17 18:46:46,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:46,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626782913] [2024-09-17 18:46:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:46,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:46:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:46:46,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:46:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:46:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:46:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:46:46,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:46:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:46:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:46:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:46:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:46:46,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:46:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:46:46,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:46:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:46:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-17 18:46:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-17 18:46:46,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:46,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626782913] [2024-09-17 18:46:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626782913] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:46:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:46:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:46:46,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398515752] [2024-09-17 18:46:46,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:46:46,994 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:46:46,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:46,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:46:46,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:46:46,995 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 18:46:47,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:47,100 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-17 18:46:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:46:47,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-17 18:46:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:47,102 INFO L225 Difference]: With dead ends: 275 [2024-09-17 18:46:47,102 INFO L226 Difference]: Without dead ends: 201 [2024-09-17 18:46:47,103 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:46:47,103 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:47,104 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:46:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-17 18:46:47,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-17 18:46:47,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-17 18:46:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-17 18:46:47,157 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-17 18:46:47,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:47,157 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-17 18:46:47,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 18:46:47,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:47,158 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-17 18:46:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-17 18:46:47,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:47,159 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:47,159 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-17 18:46:47,159 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:47,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:47,159 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-17 18:46:47,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:47,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705224232] [2024-09-17 18:46:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:47,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:47,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218306159] [2024-09-17 18:46:47,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:47,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:47,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:47,176 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:47,177 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:46:47,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:47,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-17 18:46:47,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-17 18:46:48,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705224232] [2024-09-17 18:46:48,191 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:48,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218306159] [2024-09-17 18:46:48,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218306159] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:48,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:48,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:46:48,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977341550] [2024-09-17 18:46:48,191 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:48,192 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:46:48,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:48,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:46:48,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:46:48,192 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-17 18:46:48,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:48,723 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-17 18:46:48,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:46:48,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-17 18:46:48,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:48,724 INFO L225 Difference]: With dead ends: 201 [2024-09-17 18:46:48,724 INFO L226 Difference]: Without dead ends: 199 [2024-09-17 18:46:48,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:46:48,725 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:48,725 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:46:48,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-17 18:46:48,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-17 18:46:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-17 18:46:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-17 18:46:48,777 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-17 18:46:48,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:48,777 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-17 18:46:48,777 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-17 18:46:48,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:48,778 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-17 18:46:48,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:46:48,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:48,779 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:48,791 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:48,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:48,980 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:48,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-17 18:46:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:48,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058873884] [2024-09-17 18:46:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:46:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 18:46:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-17 18:46:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:46:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:46:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:46:49,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:46:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:46:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:46:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:46:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:46:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:46:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:46:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:46:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:46:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:46:49,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-17 18:46:49,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-17 18:46:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:46:49,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 18:46:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-17 18:46:49,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058873884] [2024-09-17 18:46:49,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058873884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:49,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240003648] [2024-09-17 18:46:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:49,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:49,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:49,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:49,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:46:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:46:49,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:46:49,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:49,189 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-17 18:46:49,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:49,259 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-17 18:46:49,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240003648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:46:49,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:46:49,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-17 18:46:49,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629436772] [2024-09-17 18:46:49,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:49,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:46:49,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:49,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:46:49,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:46:49,260 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-17 18:46:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:49,455 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-17 18:46:49,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 18:46:49,455 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-17 18:46:49,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:49,457 INFO L225 Difference]: With dead ends: 227 [2024-09-17 18:46:49,457 INFO L226 Difference]: Without dead ends: 215 [2024-09-17 18:46:49,457 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:46:49,458 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:49,458 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-17 18:46:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-17 18:46:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-17 18:46:49,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-17 18:46:49,512 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-17 18:46:49,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:49,512 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-17 18:46:49,512 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-17 18:46:49,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:49,512 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-17 18:46:49,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-17 18:46:49,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:49,513 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:49,530 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:49,714 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 18:46:49,714 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:49,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:49,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-17 18:46:49,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:49,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645037714] [2024-09-17 18:46:49,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:49,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031450540] [2024-09-17 18:46:49,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:46:49,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:49,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:49,733 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:49,749 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 18:46:49,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:46:49,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:49,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-17 18:46:49,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:50,003 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-17 18:46:50,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:50,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645037714] [2024-09-17 18:46:50,087 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:50,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031450540] [2024-09-17 18:46:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031450540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-17 18:46:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033255333] [2024-09-17 18:46:50,087 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:50,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:46:50,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:50,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:46:50,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:46:50,088 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:46:50,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:50,351 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-17 18:46:50,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:46:50,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-17 18:46:50,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:50,353 INFO L225 Difference]: With dead ends: 230 [2024-09-17 18:46:50,353 INFO L226 Difference]: Without dead ends: 227 [2024-09-17 18:46:50,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:46:50,354 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:50,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:46:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-17 18:46:50,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-17 18:46:50,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-17 18:46:50,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-17 18:46:50,416 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-17 18:46:50,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:50,417 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-17 18:46:50,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-17 18:46:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:50,417 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-17 18:46:50,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-17 18:46:50,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:50,418 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:50,431 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:50,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 18:46:50,622 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:50,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:50,623 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-17 18:46:50,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:50,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634158407] [2024-09-17 18:46:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:50,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:50,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:50,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [612538702] [2024-09-17 18:46:50,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:46:50,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:50,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:50,639 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:50,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 18:46:50,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:46:50,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:50,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-17 18:46:50,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-17 18:46:51,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-17 18:46:51,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:51,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634158407] [2024-09-17 18:46:51,471 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:51,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612538702] [2024-09-17 18:46:51,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612538702] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:46:51,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:46:51,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-17 18:46:51,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225291977] [2024-09-17 18:46:51,471 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:51,472 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:46:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:46:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:46:51,473 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-17 18:46:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:52,418 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-17 18:46:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:46:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-17 18:46:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:52,421 INFO L225 Difference]: With dead ends: 253 [2024-09-17 18:46:52,421 INFO L226 Difference]: Without dead ends: 251 [2024-09-17 18:46:52,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:46:52,422 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:52,422 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:46:52,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-17 18:46:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-17 18:46:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-17 18:46:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-17 18:46:52,510 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-17 18:46:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:52,510 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-17 18:46:52,510 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-17 18:46:52,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-17 18:46:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:46:52,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:52,511 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:52,525 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 18:46:52,711 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 18:46:52,711 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:52,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:52,712 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-17 18:46:52,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:52,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113135612] [2024-09-17 18:46:52,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:52,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:52,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519632206] [2024-09-17 18:46:52,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:46:52,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:52,728 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:52,729 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 18:46:52,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:46:52,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:52,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-17 18:46:52,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-17 18:46:53,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:53,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113135612] [2024-09-17 18:46:53,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:53,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519632206] [2024-09-17 18:46:53,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519632206] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:53,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:53,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-17 18:46:53,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498937381] [2024-09-17 18:46:53,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:53,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 18:46:53,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 18:46:53,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:46:53,860 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-17 18:46:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:54,628 INFO L93 Difference]: Finished difference Result 261 states and 362 transitions. [2024-09-17 18:46:54,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:46:54,629 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 128 [2024-09-17 18:46:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:54,631 INFO L225 Difference]: With dead ends: 261 [2024-09-17 18:46:54,631 INFO L226 Difference]: Without dead ends: 259 [2024-09-17 18:46:54,632 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:46:54,632 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:54,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 528 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:46:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-17 18:46:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-09-17 18:46:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 94 states have call successors, (94), 18 states have call predecessors, (94), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-17 18:46:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2024-09-17 18:46:54,745 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 128 [2024-09-17 18:46:54,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:54,746 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2024-09-17 18:46:54,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-17 18:46:54,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:54,746 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2024-09-17 18:46:54,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-17 18:46:54,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:54,747 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:54,759 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 18:46:54,947 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-17 18:46:54,948 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:54,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-17 18:46:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:54,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260286853] [2024-09-17 18:46:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:54,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745039835] [2024-09-17 18:46:54,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:46:54,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:54,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:54,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:54,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 18:46:55,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 18:46:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:55,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-17 18:46:55,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 99 proven. 79 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-17 18:46:56,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:46:56,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:46:56,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260286853] [2024-09-17 18:46:56,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:46:56,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745039835] [2024-09-17 18:46:56,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745039835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:46:56,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:46:56,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-17 18:46:56,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990779371] [2024-09-17 18:46:56,978 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:46:56,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:46:56,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:46:56,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:46:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:46:56,979 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-17 18:46:58,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:46:58,726 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2024-09-17 18:46:58,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:46:58,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 131 [2024-09-17 18:46:58,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:46:58,727 INFO L225 Difference]: With dead ends: 269 [2024-09-17 18:46:58,728 INFO L226 Difference]: Without dead ends: 267 [2024-09-17 18:46:58,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:46:58,728 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:46:58,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 637 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-17 18:46:58,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-17 18:46:58,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-09-17 18:46:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 106 states have call successors, (106), 21 states have call predecessors, (106), 20 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2024-09-17 18:46:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 368 transitions. [2024-09-17 18:46:58,844 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 368 transitions. Word has length 131 [2024-09-17 18:46:58,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:46:58,844 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 368 transitions. [2024-09-17 18:46:58,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-17 18:46:58,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:58,845 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 368 transitions. [2024-09-17 18:46:58,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-17 18:46:58,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:46:58,846 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:46:58,851 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-17 18:46:59,046 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:59,046 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:46:59,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:46:59,047 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-17 18:46:59,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:46:59,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725395664] [2024-09-17 18:46:59,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:46:59,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:46:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:46:59,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1040479405] [2024-09-17 18:46:59,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:46:59,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:46:59,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:46:59,074 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:46:59,076 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 18:46:59,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:46:59,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:46:59,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-17 18:46:59,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:46:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-17 18:46:59,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725395664] [2024-09-17 18:47:02,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040479405] [2024-09-17 18:47:02,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040479405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:02,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:47:02,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-17 18:47:02,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831430050] [2024-09-17 18:47:02,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:02,003 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:47:02,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:02,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:47:02,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:47:02,004 INFO L87 Difference]: Start difference. First operand 265 states and 368 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 18:47:02,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:02,910 INFO L93 Difference]: Finished difference Result 309 states and 429 transitions. [2024-09-17 18:47:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:47:02,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-17 18:47:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:02,912 INFO L225 Difference]: With dead ends: 309 [2024-09-17 18:47:02,912 INFO L226 Difference]: Without dead ends: 302 [2024-09-17 18:47:02,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:47:02,913 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:02,913 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 644 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 18:47:02,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-09-17 18:47:03,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 282. [2024-09-17 18:47:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 152 states have internal predecessors, (171), 110 states have call successors, (110), 23 states have call predecessors, (110), 22 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-17 18:47:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 388 transitions. [2024-09-17 18:47:03,047 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 388 transitions. Word has length 137 [2024-09-17 18:47:03,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:03,047 INFO L474 AbstractCegarLoop]: Abstraction has 282 states and 388 transitions. [2024-09-17 18:47:03,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 18:47:03,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:03,047 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 388 transitions. [2024-09-17 18:47:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-17 18:47:03,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:03,048 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2024-09-17 18:47:03,060 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-17 18:47:03,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:03,249 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:03,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:03,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1268175597, now seen corresponding path program 6 times [2024-09-17 18:47:03,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:03,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503321401] [2024-09-17 18:47:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:03,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5745063] [2024-09-17 18:47:03,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:47:03,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:03,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:03,270 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:47:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 18:47:03,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:47:03,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:47:03,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-17 18:47:03,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-09-17 18:47:04,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:38,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503321401] [2024-09-17 18:47:38,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:38,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5745063] [2024-09-17 18:47:38,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5745063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:38,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:47:38,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:47:38,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292396426] [2024-09-17 18:47:38,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:38,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:47:38,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:38,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:47:38,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=481, Unknown=2, NotChecked=0, Total=600 [2024-09-17 18:47:38,712 INFO L87 Difference]: Start difference. First operand 282 states and 388 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:47:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:39,295 INFO L93 Difference]: Finished difference Result 294 states and 398 transitions. [2024-09-17 18:47:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:47:39,296 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 150 [2024-09-17 18:47:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:39,297 INFO L225 Difference]: With dead ends: 294 [2024-09-17 18:47:39,297 INFO L226 Difference]: Without dead ends: 292 [2024-09-17 18:47:39,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2024-09-17 18:47:39,298 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 20 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:39,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 375 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:47:39,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-09-17 18:47:39,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 261. [2024-09-17 18:47:39,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 143 states have internal predecessors, (160), 98 states have call successors, (98), 23 states have call predecessors, (98), 22 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-09-17 18:47:39,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 353 transitions. [2024-09-17 18:47:39,416 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 353 transitions. Word has length 150 [2024-09-17 18:47:39,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:39,417 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 353 transitions. [2024-09-17 18:47:39,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-17 18:47:39,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:39,417 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 353 transitions. [2024-09-17 18:47:39,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-17 18:47:39,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:39,418 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:39,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-17 18:47:39,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:39,623 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:39,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:39,623 INFO L85 PathProgramCache]: Analyzing trace with hash 680663563, now seen corresponding path program 7 times [2024-09-17 18:47:39,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:39,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370731736] [2024-09-17 18:47:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:39,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:39,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [831218046] [2024-09-17 18:47:39,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:47:39,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:39,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:39,641 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:47:39,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 18:47:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:47:39,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-17 18:47:39,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 173 proven. 87 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2024-09-17 18:47:40,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:41,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:41,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370731736] [2024-09-17 18:47:41,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:41,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831218046] [2024-09-17 18:47:41,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831218046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:41,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:47:41,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-17 18:47:41,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882453011] [2024-09-17 18:47:41,209 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:41,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:47:41,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:41,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:47:41,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:47:41,210 INFO L87 Difference]: Start difference. First operand 261 states and 353 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-17 18:47:42,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:42,514 INFO L93 Difference]: Finished difference Result 299 states and 401 transitions. [2024-09-17 18:47:42,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:47:42,514 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 153 [2024-09-17 18:47:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:42,516 INFO L225 Difference]: With dead ends: 299 [2024-09-17 18:47:42,516 INFO L226 Difference]: Without dead ends: 297 [2024-09-17 18:47:42,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:47:42,516 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:42,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 582 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-17 18:47:42,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-09-17 18:47:42,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 266. [2024-09-17 18:47:42,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 146 states have internal predecessors, (163), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-09-17 18:47:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 356 transitions. [2024-09-17 18:47:42,642 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 356 transitions. Word has length 153 [2024-09-17 18:47:42,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:42,642 INFO L474 AbstractCegarLoop]: Abstraction has 266 states and 356 transitions. [2024-09-17 18:47:42,642 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-17 18:47:42,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 356 transitions. [2024-09-17 18:47:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-17 18:47:42,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:42,644 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:42,658 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-17 18:47:42,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-17 18:47:42,849 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:42,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:42,849 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 8 times [2024-09-17 18:47:42,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630694285] [2024-09-17 18:47:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:42,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:42,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463665573] [2024-09-17 18:47:42,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:47:42,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:42,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:42,866 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:47:42,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 18:47:42,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:47:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:47:42,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-17 18:47:42,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:45,223 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 167 proven. 78 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-09-17 18:47:45,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:46,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630694285] [2024-09-17 18:47:46,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:46,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463665573] [2024-09-17 18:47:46,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463665573] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:46,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:47:46,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:47:46,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134566387] [2024-09-17 18:47:46,083 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:46,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:47:46,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:46,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:47:46,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:47:46,084 INFO L87 Difference]: Start difference. First operand 266 states and 356 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-17 18:47:49,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-17 18:47:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:53,697 INFO L93 Difference]: Finished difference Result 318 states and 430 transitions. [2024-09-17 18:47:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:47:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 153 [2024-09-17 18:47:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:53,699 INFO L225 Difference]: With dead ends: 318 [2024-09-17 18:47:53,699 INFO L226 Difference]: Without dead ends: 316 [2024-09-17 18:47:53,700 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:47:53,700 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:53,700 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 719 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2024-09-17 18:47:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-17 18:47:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2024-09-17 18:47:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 166 states have internal predecessors, (187), 115 states have call successors, (115), 28 states have call predecessors, (115), 27 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2024-09-17 18:47:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 414 transitions. [2024-09-17 18:47:53,850 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 414 transitions. Word has length 153 [2024-09-17 18:47:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:53,850 INFO L474 AbstractCegarLoop]: Abstraction has 307 states and 414 transitions. [2024-09-17 18:47:53,850 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-17 18:47:53,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 414 transitions. [2024-09-17 18:47:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-17 18:47:53,851 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:53,851 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:53,864 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-17 18:47:54,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-17 18:47:54,052 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:54,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:54,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-17 18:47:54,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:54,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67307801] [2024-09-17 18:47:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:54,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:54,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483767470] [2024-09-17 18:47:54,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:47:54,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:54,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:54,067 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:47:54,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 18:47:54,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:47:54,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:47:54,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-17 18:47:54,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:47:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-17 18:47:54,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:47:59,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:47:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67307801] [2024-09-17 18:47:59,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:47:59,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483767470] [2024-09-17 18:47:59,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483767470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:47:59,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:47:59,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-17 18:47:59,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967460974] [2024-09-17 18:47:59,127 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:47:59,127 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:47:59,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:47:59,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:47:59,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-17 18:47:59,128 INFO L87 Difference]: Start difference. First operand 307 states and 414 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-17 18:47:59,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:47:59,525 INFO L93 Difference]: Finished difference Result 324 states and 428 transitions. [2024-09-17 18:47:59,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:47:59,525 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-17 18:47:59,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:47:59,527 INFO L225 Difference]: With dead ends: 324 [2024-09-17 18:47:59,527 INFO L226 Difference]: Without dead ends: 317 [2024-09-17 18:47:59,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-17 18:47:59,528 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:47:59,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 260 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:47:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-09-17 18:47:59,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2024-09-17 18:47:59,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 165 states have internal predecessors, (183), 107 states have call successors, (107), 30 states have call predecessors, (107), 29 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2024-09-17 18:47:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 394 transitions. [2024-09-17 18:47:59,684 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 394 transitions. Word has length 156 [2024-09-17 18:47:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:47:59,684 INFO L474 AbstractCegarLoop]: Abstraction has 300 states and 394 transitions. [2024-09-17 18:47:59,684 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-17 18:47:59,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:59,684 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 394 transitions. [2024-09-17 18:47:59,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-17 18:47:59,685 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:47:59,685 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:47:59,698 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-17 18:47:59,889 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:59,889 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:47:59,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:47:59,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-17 18:47:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:47:59,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760090175] [2024-09-17 18:47:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:47:59,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:47:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:47:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445416203] [2024-09-17 18:47:59,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:47:59,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:47:59,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:47:59,908 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:47:59,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 18:47:59,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:47:59,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:47:59,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-17 18:47:59,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 99 proven. 80 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-17 18:48:02,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:48:04,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:48:04,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760090175] [2024-09-17 18:48:04,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:48:04,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445416203] [2024-09-17 18:48:04,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445416203] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:48:04,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:48:04,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-17 18:48:04,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456642865] [2024-09-17 18:48:04,462 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:48:04,462 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:48:04,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:48:04,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:48:04,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:48:04,463 INFO L87 Difference]: Start difference. First operand 300 states and 394 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-17 18:48:07,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:48:07,754 INFO L93 Difference]: Finished difference Result 337 states and 450 transitions. [2024-09-17 18:48:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 18:48:07,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-17 18:48:07,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:48:07,757 INFO L225 Difference]: With dead ends: 337 [2024-09-17 18:48:07,757 INFO L226 Difference]: Without dead ends: 330 [2024-09-17 18:48:07,757 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:48:07,757 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-17 18:48:07,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 482 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-17 18:48:07,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-09-17 18:48:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 309. [2024-09-17 18:48:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 168 states have (on average 1.125) internal successors, (189), 170 states have internal predecessors, (189), 111 states have call successors, (111), 30 states have call predecessors, (111), 29 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-09-17 18:48:07,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 408 transitions. [2024-09-17 18:48:07,923 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 408 transitions. Word has length 159 [2024-09-17 18:48:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:48:07,923 INFO L474 AbstractCegarLoop]: Abstraction has 309 states and 408 transitions. [2024-09-17 18:48:07,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-17 18:48:07,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:07,923 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 408 transitions. [2024-09-17 18:48:07,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-17 18:48:07,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:48:07,924 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:48:07,936 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-17 18:48:08,124 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-17 18:48:08,125 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:48:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-17 18:48:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:48:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794658040] [2024-09-17 18:48:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:48:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:48:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:48:08,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398170350] [2024-09-17 18:48:08,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:48:08,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:08,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:48:08,147 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:48:08,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 18:48:08,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:48:08,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:48:08,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-17 18:48:08,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-09-17 18:48:11,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:48:16,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:48:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794658040] [2024-09-17 18:48:16,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:48:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398170350] [2024-09-17 18:48:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398170350] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:48:16,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:48:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-17 18:48:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041429041] [2024-09-17 18:48:16,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:48:16,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:48:16,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:48:16,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:48:16,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:48:16,444 INFO L87 Difference]: Start difference. First operand 309 states and 408 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:48:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:48:20,916 INFO L93 Difference]: Finished difference Result 365 states and 486 transitions. [2024-09-17 18:48:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:48:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 159 [2024-09-17 18:48:20,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:48:20,918 INFO L225 Difference]: With dead ends: 365 [2024-09-17 18:48:20,918 INFO L226 Difference]: Without dead ends: 363 [2024-09-17 18:48:20,919 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:48:20,919 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 34 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:48:20,919 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 724 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-17 18:48:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-09-17 18:48:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2024-09-17 18:48:21,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 190 states have internal predecessors, (211), 120 states have call successors, (120), 34 states have call predecessors, (120), 33 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-09-17 18:48:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 448 transitions. [2024-09-17 18:48:21,106 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 448 transitions. Word has length 159 [2024-09-17 18:48:21,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:48:21,107 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 448 transitions. [2024-09-17 18:48:21,107 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-17 18:48:21,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:21,107 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 448 transitions. [2024-09-17 18:48:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-17 18:48:21,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:48:21,108 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:48:21,121 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-17 18:48:21,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 18:48:21,313 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:48:21,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:21,313 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-17 18:48:21,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:48:21,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429957865] [2024-09-17 18:48:21,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:48:21,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:48:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:48:21,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1430074320] [2024-09-17 18:48:21,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:48:21,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:21,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:48:21,330 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:48:21,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 18:48:21,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:48:21,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:48:21,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-17 18:48:21,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-17 18:48:21,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:48:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-17 18:48:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:48:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429957865] [2024-09-17 18:48:22,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:48:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430074320] [2024-09-17 18:48:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430074320] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:48:22,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:48:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-17 18:48:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630641667] [2024-09-17 18:48:22,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:48:22,189 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 18:48:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:48:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 18:48:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:48:22,190 INFO L87 Difference]: Start difference. First operand 341 states and 448 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-17 18:48:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:48:24,453 INFO L93 Difference]: Finished difference Result 386 states and 506 transitions. [2024-09-17 18:48:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:48:24,454 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-17 18:48:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:48:24,456 INFO L225 Difference]: With dead ends: 386 [2024-09-17 18:48:24,456 INFO L226 Difference]: Without dead ends: 373 [2024-09-17 18:48:24,456 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:48:24,457 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:48:24,457 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 576 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-17 18:48:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-09-17 18:48:24,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 352. [2024-09-17 18:48:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 197 states have (on average 1.1218274111675126) internal successors, (221), 199 states have internal predecessors, (221), 119 states have call successors, (119), 36 states have call predecessors, (119), 35 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-09-17 18:48:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2024-09-17 18:48:24,664 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 457 transitions. Word has length 164 [2024-09-17 18:48:24,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:48:24,664 INFO L474 AbstractCegarLoop]: Abstraction has 352 states and 457 transitions. [2024-09-17 18:48:24,664 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-17 18:48:24,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 457 transitions. [2024-09-17 18:48:24,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-17 18:48:24,665 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:48:24,665 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:48:24,678 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-17 18:48:24,866 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 18:48:24,866 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:48:24,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:24,866 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 9 times [2024-09-17 18:48:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:48:24,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22610271] [2024-09-17 18:48:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:48:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:48:24,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:48:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907826130] [2024-09-17 18:48:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:48:24,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:48:24,895 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:48:24,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-17 18:48:24,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:48:24,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:48:24,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-17 18:48:24,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 185 proven. 61 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2024-09-17 18:48:25,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:48:25,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:48:25,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22610271] [2024-09-17 18:48:25,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:48:25,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907826130] [2024-09-17 18:48:25,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907826130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:48:25,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:48:25,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-17 18:48:25,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535859690] [2024-09-17 18:48:25,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:48:25,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:48:25,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:48:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:48:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:48:25,955 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-17 18:48:26,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:48:26,645 INFO L93 Difference]: Finished difference Result 368 states and 470 transitions. [2024-09-17 18:48:26,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:48:26,647 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 175 [2024-09-17 18:48:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:48:26,649 INFO L225 Difference]: With dead ends: 368 [2024-09-17 18:48:26,649 INFO L226 Difference]: Without dead ends: 366 [2024-09-17 18:48:26,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:48:26,649 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:48:26,649 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 637 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:48:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-09-17 18:48:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2024-09-17 18:48:26,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 191 states have (on average 1.1151832460732984) internal successors, (213), 193 states have internal predecessors, (213), 107 states have call successors, (107), 37 states have call predecessors, (107), 36 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2024-09-17 18:48:26,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2024-09-17 18:48:26,835 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 175 [2024-09-17 18:48:26,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:48:26,836 INFO L474 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2024-09-17 18:48:26,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-17 18:48:26,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:26,836 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2024-09-17 18:48:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-17 18:48:26,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:48:26,837 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:48:26,850 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-17 18:48:27,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-17 18:48:27,038 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:48:27,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:27,038 INFO L85 PathProgramCache]: Analyzing trace with hash 515416140, now seen corresponding path program 10 times [2024-09-17 18:48:27,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:48:27,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820767082] [2024-09-17 18:48:27,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:48:27,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:48:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:48:27,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952919858] [2024-09-17 18:48:27,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:48:27,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:27,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:48:27,057 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:48:27,058 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-17 18:48:27,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:48:27,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:48:27,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-17 18:48:27,140 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:33,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 228 proven. 153 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-17 18:48:33,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:48:34,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:48:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820767082] [2024-09-17 18:48:34,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:48:34,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952919858] [2024-09-17 18:48:34,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952919858] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:48:34,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:48:34,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-17 18:48:34,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791939868] [2024-09-17 18:48:34,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:48:34,280 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:48:34,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:48:34,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:48:34,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:48:34,281 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-17 18:48:37,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-17 18:48:44,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-17 18:48:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:48:48,541 INFO L93 Difference]: Finished difference Result 365 states and 467 transitions. [2024-09-17 18:48:48,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 18:48:48,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) Word has length 175 [2024-09-17 18:48:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:48:48,544 INFO L225 Difference]: With dead ends: 365 [2024-09-17 18:48:48,544 INFO L226 Difference]: Without dead ends: 363 [2024-09-17 18:48:48,544 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:48:48,544 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 42 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:48:48,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 705 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2024-09-17 18:48:48,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-09-17 18:48:48,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 332. [2024-09-17 18:48:48,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 190 states have internal predecessors, (210), 107 states have call successors, (107), 37 states have call predecessors, (107), 36 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2024-09-17 18:48:48,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 422 transitions. [2024-09-17 18:48:48,753 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 422 transitions. Word has length 175 [2024-09-17 18:48:48,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:48:48,753 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 422 transitions. [2024-09-17 18:48:48,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-17 18:48:48,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:48,754 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 422 transitions. [2024-09-17 18:48:48,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-17 18:48:48,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:48:48,755 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:48:48,768 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-17 18:48:48,956 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:48,956 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:48:48,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:48:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 653139246, now seen corresponding path program 11 times [2024-09-17 18:48:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:48:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599569834] [2024-09-17 18:48:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:48:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:48:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:48:48,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [849248108] [2024-09-17 18:48:48,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:48:48,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:48:48,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:48:48,974 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:48:48,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-17 18:48:49,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-17 18:48:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:48:49,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-17 18:48:49,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:48:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 199 proven. 134 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2024-09-17 18:48:50,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:50:07,746 WARN L293 SmtUtils]: Spent 17.95s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-17 18:50:38,853 WARN L293 SmtUtils]: Spent 5.69s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)