./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5189fb62 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.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 e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-5189fb6-m [2024-09-13 00:24:16,364 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 00:24:16,428 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 00:24:16,436 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 00:24:16,436 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 00:24:16,472 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 00:24:16,472 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 00:24:16,473 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 00:24:16,473 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 00:24:16,474 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 00:24:16,476 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 00:24:16,476 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 00:24:16,477 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 00:24:16,479 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 00:24:16,480 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 00:24:16,480 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 00:24:16,480 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 00:24:16,481 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 00:24:16,481 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 00:24:16,481 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 00:24:16,482 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 00:24:16,482 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 00:24:16,483 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 00:24:16,486 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 00:24:16,486 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 00:24:16,487 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 00:24:16,487 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 00:24:16,487 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 00:24:16,488 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 00:24:16,488 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 00:24:16,488 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 00:24:16,488 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 00:24:16,488 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:24:16,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 00:24:16,491 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 00:24:16,491 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 00:24:16,491 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 00:24:16,491 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 00:24:16,492 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 00:24:16,492 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 00:24:16,493 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 00:24:16,493 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 00:24:16,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e587d407128aaafd417211e5ccf66790913a0bc1afeba03ae0cdb578f5831614 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 00:24:16,751 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 00:24:16,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 00:24:16,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 00:24:16,781 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 00:24:16,781 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 00:24:16,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-13 00:24:18,319 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 00:24:18,514 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 00:24:18,515 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c [2024-09-13 00:24:18,522 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/667226873/565e0798e9db4a8bad5251f58a3be5b2/FLAG0933e7cb4 [2024-09-13 00:24:18,536 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/667226873/565e0798e9db4a8bad5251f58a3be5b2 [2024-09-13 00:24:18,538 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 00:24:18,539 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 00:24:18,540 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 00:24:18,540 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 00:24:18,546 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 00:24:18,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,548 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21962752 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18, skipping insertion in model container [2024-09-13 00:24:18,548 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,568 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 00:24:18,704 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2024-09-13 00:24:18,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:24:18,733 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 00:24:18,745 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound20.c[490,503] [2024-09-13 00:24:18,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 00:24:18,807 INFO L204 MainTranslator]: Completed translation [2024-09-13 00:24:18,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18 WrapperNode [2024-09-13 00:24:18,808 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 00:24:18,809 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 00:24:18,809 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 00:24:18,809 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 00:24:18,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,831 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 00:24:18,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 00:24:18,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 00:24:18,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 00:24:18,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 00:24:18,842 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,851 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,862 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-13 00:24:18,864 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,865 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,868 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,874 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,876 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,877 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,879 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 00:24:18,880 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 00:24:18,880 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 00:24:18,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 00:24:18,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (1/1) ... [2024-09-13 00:24:18,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 00:24:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:18,918 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 00:24:18,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 00:24:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 00:24:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 00:24:18,960 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 00:24:18,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 00:24:18,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 00:24:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 00:24:18,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 00:24:18,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 00:24:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 00:24:18,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 00:24:18,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 00:24:18,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 00:24:19,016 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 00:24:19,018 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 00:24:19,203 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-13 00:24:19,203 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 00:24:19,225 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 00:24:19,226 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 00:24:19,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:24:19 BoogieIcfgContainer [2024-09-13 00:24:19,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 00:24:19,229 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 00:24:19,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 00:24:19,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 00:24:19,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 12:24:18" (1/3) ... [2024-09-13 00:24:19,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbc3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:24:19, skipping insertion in model container [2024-09-13 00:24:19,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 12:24:18" (2/3) ... [2024-09-13 00:24:19,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cfbc3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 12:24:19, skipping insertion in model container [2024-09-13 00:24:19,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 12:24:19" (3/3) ... [2024-09-13 00:24:19,235 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound20.c [2024-09-13 00:24:19,250 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 00:24:19,250 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 00:24:19,303 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 00:24:19,308 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;@4acd7687, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 00:24:19,309 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 00:24:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-13 00:24:19,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 00:24:19,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:19,321 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:19,321 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:19,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:19,326 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-13 00:24:19,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:19,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033587117] [2024-09-13 00:24:19,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:19,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:19,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:19,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,538 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:24:19,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:19,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033587117] [2024-09-13 00:24:19,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033587117] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:19,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:19,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 00:24:19,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847354706] [2024-09-13 00:24:19,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:19,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 00:24:19,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 00:24:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:24:19,578 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:24:19,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:19,623 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-13 00:24:19,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 00:24:19,626 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-13 00:24:19,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:19,634 INFO L225 Difference]: With dead ends: 70 [2024-09-13 00:24:19,635 INFO L226 Difference]: Without dead ends: 34 [2024-09-13 00:24:19,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 00:24:19,643 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:19,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:19,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-13 00:24:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-13 00:24:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 00:24:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-13 00:24:19,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-13 00:24:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:19,687 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-13 00:24:19,687 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-13 00:24:19,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:19,688 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-13 00:24:19,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 00:24:19,690 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:19,690 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:19,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 00:24:19,691 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:19,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:19,691 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-13 00:24:19,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:19,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881636515] [2024-09-13 00:24:19,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:19,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:19,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:20,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:20,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:24:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:20,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881636515] [2024-09-13 00:24:20,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881636515] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:20,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741363205] [2024-09-13 00:24:20,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:20,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:20,034 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:20,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 00:24:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:20,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-13 00:24:20,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-13 00:24:20,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:20,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741363205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:20,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:20,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-13 00:24:20,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506095500] [2024-09-13 00:24:20,638 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:20,638 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 00:24:20,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:20,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 00:24:20,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:24:20,640 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:24:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:20,912 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-13 00:24:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:24:20,913 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-13 00:24:20,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:20,915 INFO L225 Difference]: With dead ends: 55 [2024-09-13 00:24:20,915 INFO L226 Difference]: Without dead ends: 47 [2024-09-13 00:24:20,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-13 00:24:20,917 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:20,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:24:20,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-13 00:24:20,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-13 00:24:20,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:24:20,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-13 00:24:20,931 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-13 00:24:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:20,931 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-13 00:24:20,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-13 00:24:20,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-13 00:24:20,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 00:24:20,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:20,933 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:20,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 00:24:21,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:21,135 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:21,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:21,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-13 00:24:21,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:21,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810548082] [2024-09-13 00:24:21,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:21,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:21,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842890882] [2024-09-13 00:24:21,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:21,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:21,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:21,172 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:21,175 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 00:24:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:21,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:24:21,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:21,268 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:24:21,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:24:21,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:21,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810548082] [2024-09-13 00:24:21,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:21,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842890882] [2024-09-13 00:24:21,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842890882] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:21,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:21,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:24:21,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904902795] [2024-09-13 00:24:21,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:21,272 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:24:21,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:21,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:24:21,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:24:21,274 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:24:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:21,336 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-13 00:24:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:24:21,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-13 00:24:21,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:21,338 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:24:21,340 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:24:21,340 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:24:21,341 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:21,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:21,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:24:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-13 00:24:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:24:21,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-13 00:24:21,368 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-13 00:24:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:21,368 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-13 00:24:21,369 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-13 00:24:21,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-13 00:24:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 00:24:21,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:21,370 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:21,388 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 00:24:21,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:21,571 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:21,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:21,572 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-13 00:24:21,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:21,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521446460] [2024-09-13 00:24:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:21,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:21,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170605390] [2024-09-13 00:24:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:21,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:21,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:21,611 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:21,614 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 00:24:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:21,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:24:21,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 00:24:21,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:24:21,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521446460] [2024-09-13 00:24:21,789 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170605390] [2024-09-13 00:24:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170605390] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:21,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:24:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674677183] [2024-09-13 00:24:21,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:21,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:24:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:24:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:24:21,791 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:24:21,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:21,848 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-13 00:24:21,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:24:21,849 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-13 00:24:21,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:21,851 INFO L225 Difference]: With dead ends: 61 [2024-09-13 00:24:21,851 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 00:24:21,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:24:21,853 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:21,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 00:24:21,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-13 00:24:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:24:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-13 00:24:21,870 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-13 00:24:21,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:21,871 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-13 00:24:21,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-13 00:24:21,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-13 00:24:21,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 00:24:21,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:21,878 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:21,896 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 00:24:22,079 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:22,080 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:22,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-13 00:24:22,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:22,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819784983] [2024-09-13 00:24:22,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:22,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:22,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:22,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101969900] [2024-09-13 00:24:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:22,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:22,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:22,104 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:22,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 00:24:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:22,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:24:22,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-13 00:24:22,291 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 00:24:22,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819784983] [2024-09-13 00:24:22,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101969900] [2024-09-13 00:24:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101969900] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:22,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:22,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:24:22,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786172361] [2024-09-13 00:24:22,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:22,293 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:24:22,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:22,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:24:22,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:24:22,295 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:24:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:22,359 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-13 00:24:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 00:24:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-13 00:24:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:22,361 INFO L225 Difference]: With dead ends: 65 [2024-09-13 00:24:22,362 INFO L226 Difference]: Without dead ends: 63 [2024-09-13 00:24:22,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 00:24:22,363 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:22,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-13 00:24:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-13 00:24:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-13 00:24:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-13 00:24:22,376 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-13 00:24:22,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:22,377 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-13 00:24:22,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 00:24:22,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:22,377 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-13 00:24:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-13 00:24:22,379 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:22,379 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:22,397 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:22,579 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:22,580 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:22,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:22,580 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-13 00:24:22,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:22,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94789999] [2024-09-13 00:24:22,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:22,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:22,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629735160] [2024-09-13 00:24:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:22,604 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:22,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 00:24:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:22,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 00:24:22,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:24:22,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 00:24:22,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:22,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94789999] [2024-09-13 00:24:22,812 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:22,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629735160] [2024-09-13 00:24:22,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629735160] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:22,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:22,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-13 00:24:22,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024394529] [2024-09-13 00:24:22,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:22,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:24:22,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:22,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:24:22,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:22,814 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:24:22,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:22,950 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-13 00:24:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 00:24:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-13 00:24:22,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:22,953 INFO L225 Difference]: With dead ends: 90 [2024-09-13 00:24:22,953 INFO L226 Difference]: Without dead ends: 88 [2024-09-13 00:24:22,954 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:24:22,955 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:22,955 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:22,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-13 00:24:22,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-13 00:24:22,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 00:24:22,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-13 00:24:22,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-13 00:24:22,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:22,980 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-13 00:24:22,980 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 00:24:22,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:22,981 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-13 00:24:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-13 00:24:22,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:22,984 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:23,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 00:24:23,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-13 00:24:23,185 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:23,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-13 00:24:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:23,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458390936] [2024-09-13 00:24:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:23,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,418 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:24:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:24:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:24:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:24:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:24:23,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:23,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458390936] [2024-09-13 00:24:23,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458390936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:23,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801042823] [2024-09-13 00:24:23,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:23,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:23,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:23,459 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:23,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 00:24:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:23,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 00:24:23,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:23,562 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:24:23,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-13 00:24:23,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801042823] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:23,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:24:23,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-13 00:24:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811371864] [2024-09-13 00:24:23,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:23,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 00:24:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 00:24:23,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-13 00:24:23,662 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:24:23,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:23,853 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-13 00:24:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:24:23,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-13 00:24:23,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:23,855 INFO L225 Difference]: With dead ends: 105 [2024-09-13 00:24:23,855 INFO L226 Difference]: Without dead ends: 97 [2024-09-13 00:24:23,856 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:24:23,857 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:23,857 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-13 00:24:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-13 00:24:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-13 00:24:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-13 00:24:23,896 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-13 00:24:23,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:23,897 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-13 00:24:23,897 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-13 00:24:23,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-13 00:24:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-13 00:24:23,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:23,900 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:23,918 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:24,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:24,101 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:24,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-13 00:24:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900464465] [2024-09-13 00:24:24,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:24,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993130961] [2024-09-13 00:24:24,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:24,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:24,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:24,125 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:24,126 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 00:24:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:24,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 00:24:24,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-13 00:24:24,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:24,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900464465] [2024-09-13 00:24:24,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:24,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993130961] [2024-09-13 00:24:24,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993130961] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:24,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:24,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-13 00:24:24,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032659165] [2024-09-13 00:24:24,369 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:24,369 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 00:24:24,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 00:24:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:24,370 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:24:24,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:24,495 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-13 00:24:24,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:24:24,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-13 00:24:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:24,500 INFO L225 Difference]: With dead ends: 123 [2024-09-13 00:24:24,500 INFO L226 Difference]: Without dead ends: 120 [2024-09-13 00:24:24,501 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-13 00:24:24,501 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:24,502 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:24,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-13 00:24:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-13 00:24:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:24:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-13 00:24:24,552 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-13 00:24:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:24,553 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-13 00:24:24,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-13 00:24:24,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-13 00:24:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-13 00:24:24,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:24,555 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:24,572 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 00:24:24,755 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:24,756 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:24,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-13 00:24:24,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:24,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149528184] [2024-09-13 00:24:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325520478] [2024-09-13 00:24:24,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:24:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:24,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:24,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 00:24:24,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:24:24,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:24,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-13 00:24:24,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-13 00:24:25,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:25,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:25,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149528184] [2024-09-13 00:24:25,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:25,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325520478] [2024-09-13 00:24:25,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325520478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:25,152 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:25,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:24:25,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731852516] [2024-09-13 00:24:25,152 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:25,152 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:24:25,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:25,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:24:25,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:24:25,154 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:24:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:25,328 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-13 00:24:25,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:24:25,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-13 00:24:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:25,331 INFO L225 Difference]: With dead ends: 129 [2024-09-13 00:24:25,331 INFO L226 Difference]: Without dead ends: 127 [2024-09-13 00:24:25,331 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-13 00:24:25,332 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:25,332 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-13 00:24:25,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-13 00:24:25,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:24:25,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-13 00:24:25,363 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-13 00:24:25,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:25,363 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-13 00:24:25,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-13 00:24:25,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-13 00:24:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 00:24:25,365 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:25,365 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:25,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-13 00:24:25,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:25,570 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:25,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:25,570 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-13 00:24:25,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:25,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725709194] [2024-09-13 00:24:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:25,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:25,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117887422] [2024-09-13 00:24:25,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:24:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:25,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:25,589 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) [2024-09-13 00:24:25,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 00:24:25,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:24:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:25,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-13 00:24:25,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-13 00:24:26,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725709194] [2024-09-13 00:24:42,059 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:42,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117887422] [2024-09-13 00:24:42,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117887422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:42,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:42,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:24:42,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652471341] [2024-09-13 00:24:42,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:42,060 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:24:42,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:42,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:24:42,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-13 00:24:42,061 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:24:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:42,559 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-13 00:24:42,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:24:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-13 00:24:42,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:42,561 INFO L225 Difference]: With dead ends: 133 [2024-09-13 00:24:42,561 INFO L226 Difference]: Without dead ends: 131 [2024-09-13 00:24:42,562 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-13 00:24:42,562 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:42,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 00:24:42,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-13 00:24:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-13 00:24:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-13 00:24:42,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-13 00:24:42,594 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-13 00:24:42,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:42,594 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-13 00:24:42,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-13 00:24:42,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:42,595 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-13 00:24:42,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-13 00:24:42,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:42,596 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:42,615 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:42,800 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 00:24:42,801 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-13 00:24:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313204833] [2024-09-13 00:24:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:42,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:42,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658163019] [2024-09-13 00:24:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:42,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:42,819 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:42,820 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 00:24:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:42,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:24:42,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-13 00:24:43,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 00:24:44,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313204833] [2024-09-13 00:24:44,217 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:44,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658163019] [2024-09-13 00:24:44,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658163019] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:44,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:44,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-13 00:24:44,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442827467] [2024-09-13 00:24:44,217 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:44,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:24:44,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:44,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:24:44,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:24:44,219 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:24:48,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:24:51,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:51,422 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2024-09-13 00:24:51,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 00:24:51,423 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-13 00:24:51,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:51,425 INFO L225 Difference]: With dead ends: 262 [2024-09-13 00:24:51,425 INFO L226 Difference]: Without dead ends: 258 [2024-09-13 00:24:51,426 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=296, Invalid=1264, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 00:24:51,427 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 73 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 103 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:51,427 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 454 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 563 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2024-09-13 00:24:51,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2024-09-13 00:24:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2024-09-13 00:24:51,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 129 states have (on average 1.255813953488372) internal successors, (162), 132 states have internal predecessors, (162), 112 states have call successors, (112), 14 states have call predecessors, (112), 13 states have return successors, (109), 108 states have call predecessors, (109), 109 states have call successors, (109) [2024-09-13 00:24:51,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 383 transitions. [2024-09-13 00:24:51,537 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 383 transitions. Word has length 90 [2024-09-13 00:24:51,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:51,537 INFO L474 AbstractCegarLoop]: Abstraction has 255 states and 383 transitions. [2024-09-13 00:24:51,537 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:24:51,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:51,538 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 383 transitions. [2024-09-13 00:24:51,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-13 00:24:51,539 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:51,539 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:51,553 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:51,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 00:24:51,740 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:51,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:51,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-13 00:24:51,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:51,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101587774] [2024-09-13 00:24:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:51,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:51,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:24:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:24:51,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:24:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:24:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:24:51,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:24:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:24:51,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:24:51,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-13 00:24:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-13 00:24:51,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101587774] [2024-09-13 00:24:51,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101587774] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 00:24:51,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 00:24:51,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 00:24:51,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145076556] [2024-09-13 00:24:51,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 00:24:51,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 00:24:51,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 00:24:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 00:24:51,866 INFO L87 Difference]: Start difference. First operand 255 states and 383 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:24:52,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:52,004 INFO L93 Difference]: Finished difference Result 329 states and 496 transitions. [2024-09-13 00:24:52,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 00:24:52,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-13 00:24:52,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:52,007 INFO L225 Difference]: With dead ends: 329 [2024-09-13 00:24:52,007 INFO L226 Difference]: Without dead ends: 222 [2024-09-13 00:24:52,011 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:52,012 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:52,013 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 00:24:52,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-13 00:24:52,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 204. [2024-09-13 00:24:52,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 102 states have (on average 1.1862745098039216) internal successors, (121), 105 states have internal predecessors, (121), 88 states have call successors, (88), 14 states have call predecessors, (88), 13 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 00:24:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 294 transitions. [2024-09-13 00:24:52,099 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 294 transitions. Word has length 99 [2024-09-13 00:24:52,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:52,100 INFO L474 AbstractCegarLoop]: Abstraction has 204 states and 294 transitions. [2024-09-13 00:24:52,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-13 00:24:52,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:52,100 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 294 transitions. [2024-09-13 00:24:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-13 00:24:52,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:52,102 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:52,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-13 00:24:52,102 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:52,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:52,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-13 00:24:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:52,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643121966] [2024-09-13 00:24:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:52,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [9648939] [2024-09-13 00:24:52,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:52,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:52,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:52,137 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:52,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 00:24:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:52,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-13 00:24:52,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-13 00:24:53,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643121966] [2024-09-13 00:24:53,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:53,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9648939] [2024-09-13 00:24:53,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9648939] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:53,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:53,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:24:53,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306032561] [2024-09-13 00:24:53,738 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:53,738 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:24:53,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:53,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:24:53,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:24:53,740 INFO L87 Difference]: Start difference. First operand 204 states and 294 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:24:54,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:54,431 INFO L93 Difference]: Finished difference Result 216 states and 304 transitions. [2024-09-13 00:24:54,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:24:54,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-13 00:24:54,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:54,434 INFO L225 Difference]: With dead ends: 216 [2024-09-13 00:24:54,434 INFO L226 Difference]: Without dead ends: 214 [2024-09-13 00:24:54,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:24:54,435 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 37 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:54,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 385 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 00:24:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-13 00:24:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2024-09-13 00:24:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 108 states have (on average 1.1759259259259258) internal successors, (127), 111 states have internal predecessors, (127), 88 states have call successors, (88), 16 states have call predecessors, (88), 15 states have return successors, (85), 84 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-13 00:24:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 300 transitions. [2024-09-13 00:24:54,516 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 300 transitions. Word has length 106 [2024-09-13 00:24:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:54,516 INFO L474 AbstractCegarLoop]: Abstraction has 212 states and 300 transitions. [2024-09-13 00:24:54,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-13 00:24:54,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 300 transitions. [2024-09-13 00:24:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-13 00:24:54,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:54,518 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:54,534 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:54,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:54,719 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:54,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:54,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-13 00:24:54,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:54,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101753446] [2024-09-13 00:24:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:54,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:54,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 00:24:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-13 00:24:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-13 00:24:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 00:24:54,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 00:24:54,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 00:24:54,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 00:24:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-13 00:24:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-13 00:24:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-13 00:24:54,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-13 00:24:54,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 00:24:54,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 00:24:54,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 00:24:54,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 00:24:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-13 00:24:54,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-13 00:24:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-13 00:24:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-13 00:24:54,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-13 00:24:54,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,891 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:54,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:54,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101753446] [2024-09-13 00:24:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101753446] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114869390] [2024-09-13 00:24:54,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:54,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:54,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:54,894 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:54,895 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 00:24:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:24:54,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 00:24:54,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-13 00:24:54,996 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114869390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:55,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 00:24:55,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-13 00:24:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002362164] [2024-09-13 00:24:55,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:55,094 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-13 00:24:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:55,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-13 00:24:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-13 00:24:55,095 INFO L87 Difference]: Start difference. First operand 212 states and 300 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:24:55,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:55,374 INFO L93 Difference]: Finished difference Result 252 states and 359 transitions. [2024-09-13 00:24:55,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 00:24:55,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-13 00:24:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:55,376 INFO L225 Difference]: With dead ends: 252 [2024-09-13 00:24:55,378 INFO L226 Difference]: Without dead ends: 239 [2024-09-13 00:24:55,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-13 00:24:55,379 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:55,379 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:55,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-13 00:24:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 196. [2024-09-13 00:24:55,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-13 00:24:55,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-13 00:24:55,461 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-13 00:24:55,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:55,462 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-13 00:24:55,462 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-13 00:24:55,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:55,462 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-13 00:24:55,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-13 00:24:55,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:55,464 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:55,482 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:55,664 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 00:24:55,665 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:55,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-13 00:24:55,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:55,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884366295] [2024-09-13 00:24:55,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:55,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:55,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:55,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046005697] [2024-09-13 00:24:55,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:24:55,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:55,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:55,693 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:55,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 00:24:55,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:24:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:55,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 00:24:55,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:56,039 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-13 00:24:56,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:56,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884366295] [2024-09-13 00:24:56,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046005697] [2024-09-13 00:24:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046005697] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:24:56,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:24:56,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-13 00:24:56,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490031812] [2024-09-13 00:24:56,145 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:56,145 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-13 00:24:56,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:56,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-13 00:24:56,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-13 00:24:56,146 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:24:56,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:56,390 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-13 00:24:56,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-13 00:24:56,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-13 00:24:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:56,393 INFO L225 Difference]: With dead ends: 230 [2024-09-13 00:24:56,393 INFO L226 Difference]: Without dead ends: 227 [2024-09-13 00:24:56,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-13 00:24:56,395 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:56,395 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 321 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 00:24:56,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-13 00:24:56,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-13 00:24:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:24:56,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-13 00:24:56,479 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-13 00:24:56,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:56,480 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-13 00:24:56,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 00:24:56,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-13 00:24:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-13 00:24:56,481 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:56,481 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:56,501 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:56,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 00:24:56,682 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:56,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-13 00:24:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:56,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003641614] [2024-09-13 00:24:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:56,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104377827] [2024-09-13 00:24:56,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:24:56,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:56,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:56,710 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:56,712 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 00:24:56,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:24:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:56,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-13 00:24:56,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:24:57,175 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:24:57,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:24:57,571 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-13 00:24:57,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:24:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003641614] [2024-09-13 00:24:57,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:24:57,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104377827] [2024-09-13 00:24:57,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104377827] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:24:57,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:24:57,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-13 00:24:57,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944375746] [2024-09-13 00:24:57,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:24:57,573 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:24:57,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:24:57,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:24:57,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-13 00:24:57,574 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:24:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:24:59,004 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-13 00:24:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:24:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-13 00:24:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:24:59,006 INFO L225 Difference]: With dead ends: 253 [2024-09-13 00:24:59,006 INFO L226 Difference]: Without dead ends: 251 [2024-09-13 00:24:59,007 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 [2024-09-13 00:24:59,007 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 47 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:24:59,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 510 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:24:59,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-13 00:24:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-13 00:24:59,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-13 00:24:59,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-13 00:24:59,145 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-13 00:24:59,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:24:59,146 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-13 00:24:59,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-13 00:24:59,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:59,146 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-13 00:24:59,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-13 00:24:59,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:24:59,147 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:24:59,164 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-13 00:24:59,348 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 00:24:59,348 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:24:59,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:24:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-13 00:24:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:24:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936740110] [2024-09-13 00:24:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:24:59,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:24:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:24:59,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87732534] [2024-09-13 00:24:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:24:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:24:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:24:59,373 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:24:59,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 00:24:59,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:24:59,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:24:59,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 00:24:59,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:25:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:25:00,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:25:18,298 WARN L293 SmtUtils]: Spent 8.43s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:25:27,435 WARN L293 SmtUtils]: Spent 9.06s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:25:33,215 WARN L293 SmtUtils]: Spent 5.78s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:26:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 76 proven. 67 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2024-09-13 00:26:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:26:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936740110] [2024-09-13 00:26:06,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:26:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87732534] [2024-09-13 00:26:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87732534] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:26:06,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:26:06,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 23 [2024-09-13 00:26:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653560027] [2024-09-13 00:26:06,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:26:06,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 00:26:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:26:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 00:26:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=390, Unknown=1, NotChecked=0, Total=506 [2024-09-13 00:26:06,244 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:26:29,484 WARN L293 SmtUtils]: Spent 20.53s on a formula simplification. DAG size of input: 95 DAG size of output: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:26:37,482 WARN L293 SmtUtils]: Spent 7.81s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:26:39,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:43,054 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:26:57,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:14,650 WARN L293 SmtUtils]: Spent 16.84s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:27:18,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:30,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:34,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:40,374 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.51s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:27:44,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:28:02,018 WARN L293 SmtUtils]: Spent 10.93s on a formula simplification that was a NOOP. DAG size: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:28:05,157 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.80s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:28:12,454 WARN L293 SmtUtils]: Spent 5.66s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:28:13,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:28:13,934 INFO L93 Difference]: Finished difference Result 318 states and 455 transitions. [2024-09-13 00:28:13,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 00:28:13,935 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 128 [2024-09-13 00:28:13,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:28:13,937 INFO L225 Difference]: With dead ends: 318 [2024-09-13 00:28:13,937 INFO L226 Difference]: Without dead ends: 316 [2024-09-13 00:28:13,938 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 108.2s TimeCoverageRelationStatistics Valid=399, Invalid=1082, Unknown=1, NotChecked=0, Total=1482 [2024-09-13 00:28:13,938 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 72 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 102 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 39.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:28:13,939 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 482 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 518 Invalid, 6 Unknown, 0 Unchecked, 39.2s Time] [2024-09-13 00:28:13,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-13 00:28:14,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310. [2024-09-13 00:28:14,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 158 states have (on average 1.1772151898734178) internal successors, (186), 162 states have internal predecessors, (186), 131 states have call successors, (131), 21 states have call predecessors, (131), 20 states have return successors, (128), 126 states have call predecessors, (128), 128 states have call successors, (128) [2024-09-13 00:28:14,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 445 transitions. [2024-09-13 00:28:14,228 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 445 transitions. Word has length 128 [2024-09-13 00:28:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:28:14,229 INFO L474 AbstractCegarLoop]: Abstraction has 310 states and 445 transitions. [2024-09-13 00:28:14,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 20 states have internal predecessors, (43), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2024-09-13 00:28:14,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:28:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 445 transitions. [2024-09-13 00:28:14,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-13 00:28:14,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:28:14,231 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:28:14,247 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 00:28:14,431 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 00:28:14,431 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:28:14,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:28:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-13 00:28:14,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:28:14,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662309983] [2024-09-13 00:28:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:28:14,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:28:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:28:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882790543] [2024-09-13 00:28:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:28:14,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:28:14,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:28:14,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:28:14,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 00:28:14,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-13 00:28:14,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:28:14,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-13 00:28:14,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:28:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 102 proven. 91 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2024-09-13 00:28:15,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:28:37,672 WARN L293 SmtUtils]: Spent 9.78s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:28:48,241 WARN L293 SmtUtils]: Spent 6.46s on a formula simplification that was a NOOP. DAG size: 16 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-13 00:29:20,485 WARN L293 SmtUtils]: Spent 17.52s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:30:15,802 WARN L293 SmtUtils]: Spent 9.28s on a formula simplification that was a NOOP. DAG size: 55 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:30:24,108 WARN L876 $PredicateComparison]: unable to prove that (or (forall ((v_main_~q~0_51 Int)) (let ((.cse0 (* c_main_~yy~0 c_main_~s~0 c_main_~k~0)) (.cse3 (* c_main_~yy~0 c_main_~r~0)) (.cse4 (* v_main_~q~0_51 c_main_~xy~0)) (.cse1 (* c_main_~r~0 c_main_~y~0)) (.cse2 (* v_main_~q~0_51 c_main_~x~0)) (.cse6 (* c_main_~q~0 c_main_~x~0)) (.cse7 (* c_main_~s~0 c_main_~y~0)) (.cse5 (* c_main_~s~0 c_main_~y~0 c_main_~k~0))) (or (not (= (+ .cse0 .cse1 .cse2 (* c_main_~c~0 c_main_~y~0)) (+ .cse3 c_main_~c~0 .cse4 .cse5))) (not (= (+ c_main_~c~0 .cse5) (+ .cse1 .cse2))) (not (= (+ .cse6 c_main_~c~0 .cse7 .cse5) (+ c_main_~b~0 .cse1 .cse2))) (= (+ (* c_main_~q~0 c_main_~xy~0) .cse0 (* c_main_~yy~0 c_main_~s~0) (* v_main_~q~0_51 c_main_~x~0 c_main_~y~0) (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ .cse3 (* c_main_~q~0 c_main_~x~0 c_main_~y~0) .cse4 (* c_main_~s~0 c_main_~y~0 c_main_~y~0 c_main_~k~0) (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (< (+ c_main_~c~0 .cse1 .cse2) (+ .cse6 .cse7 .cse5 1)) (< (+ v_main_~q~0_51 (* c_main_~q~0 c_main_~k~0)) c_main_~p~0)))) (< c_main_~b~0 (+ c_main_~c~0 1))) is different from true [2024-09-13 00:30:29,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:30:29,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662309983] [2024-09-13 00:30:29,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:30:29,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882790543] [2024-09-13 00:30:29,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882790543] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:30:29,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:30:29,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:30:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829636912] [2024-09-13 00:30:29,612 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:30:29,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:30:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:30:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:30:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=4, NotChecked=56, Total=930 [2024-09-13 00:30:29,614 INFO L87 Difference]: Start difference. First operand 310 states and 445 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:30:31,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:30:31,433 INFO L93 Difference]: Finished difference Result 369 states and 516 transitions. [2024-09-13 00:30:31,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:30:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 131 [2024-09-13 00:30:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:30:31,437 INFO L225 Difference]: With dead ends: 369 [2024-09-13 00:30:31,437 INFO L226 Difference]: Without dead ends: 367 [2024-09-13 00:30:31,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 172 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 73.5s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=4, NotChecked=72, Total=1482 [2024-09-13 00:30:31,439 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 32 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:30:31,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 508 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:30:31,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-09-13 00:30:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362. [2024-09-13 00:30:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 191 states have internal predecessors, (218), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:30:31,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 509 transitions. [2024-09-13 00:30:31,921 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 509 transitions. Word has length 131 [2024-09-13 00:30:31,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:30:31,922 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 509 transitions. [2024-09-13 00:30:31,922 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:30:31,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:30:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 509 transitions. [2024-09-13 00:30:31,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-13 00:30:31,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:30:31,925 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:30:31,932 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-13 00:30:32,125 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:30:32,126 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:30:32,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:30:32,126 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-13 00:30:32,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:30:32,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720173608] [2024-09-13 00:30:32,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:30:32,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:30:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:30:32,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782621260] [2024-09-13 00:30:32,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:30:32,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:30:32,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:30:32,152 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:30:32,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 00:30:32,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:30:32,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:30:32,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:30:32,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:30:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-13 00:30:32,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:30:35,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:30:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720173608] [2024-09-13 00:30:35,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:30:35,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782621260] [2024-09-13 00:30:35,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782621260] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:30:35,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:30:35,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:30:35,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245955570] [2024-09-13 00:30:35,421 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:30:35,422 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:30:35,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:30:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:30:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:30:35,423 INFO L87 Difference]: Start difference. First operand 362 states and 509 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:30:36,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:30:36,631 INFO L93 Difference]: Finished difference Result 391 states and 552 transitions. [2024-09-13 00:30:36,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:30:36,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-13 00:30:36,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:30:36,634 INFO L225 Difference]: With dead ends: 391 [2024-09-13 00:30:36,634 INFO L226 Difference]: Without dead ends: 384 [2024-09-13 00:30:36,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:30:36,635 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 28 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:30:36,635 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 693 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 00:30:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-09-13 00:30:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 362. [2024-09-13 00:30:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 187 states have (on average 1.160427807486631) internal successors, (217), 191 states have internal predecessors, (217), 147 states have call successors, (147), 28 states have call predecessors, (147), 27 states have return successors, (144), 142 states have call predecessors, (144), 144 states have call successors, (144) [2024-09-13 00:30:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 508 transitions. [2024-09-13 00:30:36,988 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 508 transitions. Word has length 137 [2024-09-13 00:30:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:30:36,988 INFO L474 AbstractCegarLoop]: Abstraction has 362 states and 508 transitions. [2024-09-13 00:30:36,988 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-13 00:30:36,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:30:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 508 transitions. [2024-09-13 00:30:36,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-13 00:30:36,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:30:36,990 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:30:37,004 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 00:30:37,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:30:37,191 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:30:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:30:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 6 times [2024-09-13 00:30:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:30:37,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206704338] [2024-09-13 00:30:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:30:37,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:30:37,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:30:37,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1172300728] [2024-09-13 00:30:37,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:30:37,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:30:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:30:37,215 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:30:37,216 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 00:30:37,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:30:37,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:30:37,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-13 00:30:37,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:30:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 161 proven. 102 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2024-09-13 00:30:40,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:31:26,444 WARN L876 $PredicateComparison]: unable to prove that (forall ((main_~k~0 Int)) (let ((.cse4 (* c_main_~yy~0 c_main_~s~0 main_~k~0)) (.cse5 (* c_main_~q~0 c_main_~xy~0 main_~k~0)) (.cse6 (* c_main_~yy~0 c_main_~r~0)) (.cse7 (* c_main_~xy~0 c_main_~p~0)) (.cse0 (* c_main_~p~0 c_main_~x~0)) (.cse1 (* c_main_~r~0 c_main_~y~0)) (.cse2 (* c_main_~s~0 main_~k~0 c_main_~y~0)) (.cse8 (* c_main_~q~0 c_main_~x~0)) (.cse9 (* c_main_~s~0 c_main_~y~0)) (.cse3 (* c_main_~q~0 main_~k~0 c_main_~x~0))) (or (not (= (+ .cse0 .cse1) (+ .cse2 c_main_~c~0 .cse3))) (= (+ (* c_main_~q~0 c_main_~xy~0) (* c_main_~yy~0 c_main_~s~0) .cse4 (* c_main_~p~0 c_main_~x~0 c_main_~y~0) .cse5 (* c_main_~r~0 c_main_~y~0 c_main_~y~0)) (+ .cse6 (* c_main_~q~0 main_~k~0 c_main_~x~0 c_main_~y~0) (* c_main_~q~0 c_main_~x~0 c_main_~y~0) (* c_main_~s~0 main_~k~0 c_main_~y~0 c_main_~y~0) .cse7 (* c_main_~s~0 c_main_~y~0 c_main_~y~0))) (not (= (+ c_main_~b~0 .cse0 .cse1) (+ .cse2 .cse8 c_main_~c~0 .cse9 .cse3))) (not (= (+ .cse4 .cse0 .cse1 (* c_main_~c~0 c_main_~y~0) .cse5) (+ .cse2 .cse6 c_main_~c~0 .cse3 .cse7))) (< (+ .cse0 c_main_~c~0 .cse1) (+ .cse2 .cse8 .cse9 .cse3 1))))) is different from true [2024-09-13 00:31:54,402 WARN L293 SmtUtils]: Spent 8.76s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-13 00:31:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:31:59,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206704338] [2024-09-13 00:31:59,317 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:31:59,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172300728] [2024-09-13 00:31:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172300728] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:31:59,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:31:59,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:31:59,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419874400] [2024-09-13 00:31:59,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:31:59,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:31:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:31:59,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:31:59,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=699, Unknown=5, NotChecked=56, Total=930 [2024-09-13 00:31:59,319 INFO L87 Difference]: Start difference. First operand 362 states and 508 transitions. Second operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:32:05,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:05,545 INFO L93 Difference]: Finished difference Result 425 states and 588 transitions. [2024-09-13 00:32:05,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:32:05,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 153 [2024-09-13 00:32:05,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:05,548 INFO L225 Difference]: With dead ends: 425 [2024-09-13 00:32:05,548 INFO L226 Difference]: Without dead ends: 423 [2024-09-13 00:32:05,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 48.3s TimeCoverageRelationStatistics Valid=225, Invalid=896, Unknown=5, NotChecked=64, Total=1190 [2024-09-13 00:32:05,550 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:05,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 472 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 00:32:05,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-13 00:32:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 418. [2024-09-13 00:32:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 217 states have (on average 1.152073732718894) internal successors, (250), 222 states have internal predecessors, (250), 167 states have call successors, (167), 34 states have call predecessors, (167), 33 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:32:06,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 581 transitions. [2024-09-13 00:32:06,073 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 581 transitions. Word has length 153 [2024-09-13 00:32:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:06,074 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 581 transitions. [2024-09-13 00:32:06,074 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 16 states have internal predecessors, (35), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2024-09-13 00:32:06,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 581 transitions. [2024-09-13 00:32:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-13 00:32:06,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:06,076 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:06,086 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:06,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:06,277 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:06,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-13 00:32:06,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:06,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586615196] [2024-09-13 00:32:06,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:06,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423944152] [2024-09-13 00:32:06,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:32:06,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:06,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:06,298 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:06,299 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 00:32:06,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 00:32:06,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:06,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 00:32:06,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-13 00:32:07,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:12,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:12,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586615196] [2024-09-13 00:32:12,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:12,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423944152] [2024-09-13 00:32:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423944152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:12,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-13 00:32:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522143857] [2024-09-13 00:32:12,120 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:12,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 00:32:12,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 00:32:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-13 00:32:12,121 INFO L87 Difference]: Start difference. First operand 418 states and 581 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:12,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:12,911 INFO L93 Difference]: Finished difference Result 435 states and 595 transitions. [2024-09-13 00:32:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 00:32:12,912 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-13 00:32:12,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:12,915 INFO L225 Difference]: With dead ends: 435 [2024-09-13 00:32:12,915 INFO L226 Difference]: Without dead ends: 428 [2024-09-13 00:32:12,916 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:32:12,916 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:12,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 236 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 00:32:12,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2024-09-13 00:32:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 417. [2024-09-13 00:32:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 218 states have (on average 1.1422018348623852) internal successors, (249), 223 states have internal predecessors, (249), 163 states have call successors, (163), 36 states have call predecessors, (163), 35 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2024-09-13 00:32:13,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 572 transitions. [2024-09-13 00:32:13,344 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 572 transitions. Word has length 156 [2024-09-13 00:32:13,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:13,344 INFO L474 AbstractCegarLoop]: Abstraction has 417 states and 572 transitions. [2024-09-13 00:32:13,344 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-13 00:32:13,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:13,345 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 572 transitions. [2024-09-13 00:32:13,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:13,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:13,346 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:13,363 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:13,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-13 00:32:13,547 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:13,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-13 00:32:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882913268] [2024-09-13 00:32:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:13,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355254164] [2024-09-13 00:32:13,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:32:13,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:13,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:13,574 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:13,575 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 00:32:13,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:32:13,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:13,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-13 00:32:13,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 63 proven. 116 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-13 00:32:14,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:16,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882913268] [2024-09-13 00:32:16,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:16,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355254164] [2024-09-13 00:32:16,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355254164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:16,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:16,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:32:16,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270302040] [2024-09-13 00:32:16,504 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:16,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:32:16,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:16,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:32:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:32:16,505 INFO L87 Difference]: Start difference. First operand 417 states and 572 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:17,967 INFO L93 Difference]: Finished difference Result 468 states and 645 transitions. [2024-09-13 00:32:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:32:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-13 00:32:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:17,971 INFO L225 Difference]: With dead ends: 468 [2024-09-13 00:32:17,971 INFO L226 Difference]: Without dead ends: 461 [2024-09-13 00:32:17,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=160, Invalid=1172, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:17,972 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 48 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:17,972 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 452 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 00:32:17,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-09-13 00:32:18,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 434. [2024-09-13 00:32:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 234 states have internal predecessors, (261), 167 states have call successors, (167), 38 states have call predecessors, (167), 37 states have return successors, (164), 161 states have call predecessors, (164), 164 states have call successors, (164) [2024-09-13 00:32:18,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 592 transitions. [2024-09-13 00:32:18,506 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 592 transitions. Word has length 159 [2024-09-13 00:32:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:18,507 INFO L474 AbstractCegarLoop]: Abstraction has 434 states and 592 transitions. [2024-09-13 00:32:18,507 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-13 00:32:18,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 592 transitions. [2024-09-13 00:32:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-13 00:32:18,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:18,509 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:18,527 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-13 00:32:18,710 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 00:32:18,710 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:18,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:18,711 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-13 00:32:18,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:18,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511576545] [2024-09-13 00:32:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:18,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:18,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97043271] [2024-09-13 00:32:18,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:32:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:18,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:18,741 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:18,742 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 00:32:18,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 00:32:18,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:18,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:32:18,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-09-13 00:32:22,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:28,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:28,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511576545] [2024-09-13 00:32:28,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:28,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97043271] [2024-09-13 00:32:28,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97043271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:28,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:28,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:32:28,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384393010] [2024-09-13 00:32:28,562 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:28,562 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:32:28,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:28,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:32:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:32:28,563 INFO L87 Difference]: Start difference. First operand 434 states and 592 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:33,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:33,902 INFO L93 Difference]: Finished difference Result 486 states and 661 transitions. [2024-09-13 00:32:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:32:33,903 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 159 [2024-09-13 00:32:33,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:33,905 INFO L225 Difference]: With dead ends: 486 [2024-09-13 00:32:33,906 INFO L226 Difference]: Without dead ends: 484 [2024-09-13 00:32:33,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 00:32:33,907 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 33 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:33,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 779 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-13 00:32:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2024-09-13 00:32:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 454. [2024-09-13 00:32:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 244 states have (on average 1.1352459016393444) internal successors, (277), 250 states have internal predecessors, (277), 168 states have call successors, (168), 42 states have call predecessors, (168), 41 states have return successors, (165), 161 states have call predecessors, (165), 165 states have call successors, (165) [2024-09-13 00:32:34,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 610 transitions. [2024-09-13 00:32:34,399 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 610 transitions. Word has length 159 [2024-09-13 00:32:34,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:34,399 INFO L474 AbstractCegarLoop]: Abstraction has 454 states and 610 transitions. [2024-09-13 00:32:34,399 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-13 00:32:34,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:34,399 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 610 transitions. [2024-09-13 00:32:34,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-13 00:32:34,401 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:34,401 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:34,419 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-13 00:32:34,601 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:34,602 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:34,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:34,602 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-13 00:32:34,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:34,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724270687] [2024-09-13 00:32:34,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:34,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:34,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1547046749] [2024-09-13 00:32:34,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:32:34,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:34,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:34,625 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:34,628 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 00:32:34,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:32:34,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:34,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:32:34,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-13 00:32:35,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-13 00:32:35,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724270687] [2024-09-13 00:32:35,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:35,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547046749] [2024-09-13 00:32:35,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547046749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:32:35,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:32:35,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-13 00:32:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019557873] [2024-09-13 00:32:35,728 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:35,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:32:35,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:35,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:32:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-13 00:32:35,729 INFO L87 Difference]: Start difference. First operand 454 states and 610 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:38,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:38,666 INFO L93 Difference]: Finished difference Result 508 states and 685 transitions. [2024-09-13 00:32:38,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:38,666 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-13 00:32:38,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:38,669 INFO L225 Difference]: With dead ends: 508 [2024-09-13 00:32:38,669 INFO L226 Difference]: Without dead ends: 495 [2024-09-13 00:32:38,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:38,671 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 1181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:38,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 727 Invalid, 1181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 00:32:38,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2024-09-13 00:32:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 470. [2024-09-13 00:32:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 256 states have (on average 1.12890625) internal successors, (289), 263 states have internal predecessors, (289), 171 states have call successors, (171), 43 states have call predecessors, (171), 42 states have return successors, (169), 163 states have call predecessors, (169), 169 states have call successors, (169) [2024-09-13 00:32:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 629 transitions. [2024-09-13 00:32:39,137 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 629 transitions. Word has length 164 [2024-09-13 00:32:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:39,138 INFO L474 AbstractCegarLoop]: Abstraction has 470 states and 629 transitions. [2024-09-13 00:32:39,138 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-13 00:32:39,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 629 transitions. [2024-09-13 00:32:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-13 00:32:39,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:39,140 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:39,152 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:39,340 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 00:32:39,340 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:39,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:39,341 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 7 times [2024-09-13 00:32:39,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:39,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229573496] [2024-09-13 00:32:39,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:39,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:39,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [580166270] [2024-09-13 00:32:39,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:32:39,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:39,364 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:39,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 00:32:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:32:39,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 00:32:39,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:40,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 122 proven. 157 refuted. 0 times theorem prover too weak. 931 trivial. 0 not checked. [2024-09-13 00:32:40,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:41,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229573496] [2024-09-13 00:32:41,092 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:41,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580166270] [2024-09-13 00:32:41,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580166270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:41,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:32:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432802920] [2024-09-13 00:32:41,092 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:41,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:32:41,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:41,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:32:41,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:32:41,094 INFO L87 Difference]: Start difference. First operand 470 states and 629 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:42,680 INFO L93 Difference]: Finished difference Result 515 states and 689 transitions. [2024-09-13 00:32:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:32:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) Word has length 175 [2024-09-13 00:32:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:42,688 INFO L225 Difference]: With dead ends: 515 [2024-09-13 00:32:42,689 INFO L226 Difference]: Without dead ends: 513 [2024-09-13 00:32:42,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2024-09-13 00:32:42,692 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 49 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:42,692 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 649 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 00:32:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-09-13 00:32:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2024-09-13 00:32:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 276 states have (on average 1.1304347826086956) internal successors, (312), 283 states have internal predecessors, (312), 187 states have call successors, (187), 47 states have call predecessors, (187), 46 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2024-09-13 00:32:43,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 684 transitions. [2024-09-13 00:32:43,343 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 684 transitions. Word has length 175 [2024-09-13 00:32:43,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:43,343 INFO L474 AbstractCegarLoop]: Abstraction has 510 states and 684 transitions. [2024-09-13 00:32:43,343 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:43,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 684 transitions. [2024-09-13 00:32:43,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2024-09-13 00:32:43,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:43,350 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:43,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 00:32:43,550 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 00:32:43,550 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:43,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:43,551 INFO L85 PathProgramCache]: Analyzing trace with hash -942115888, now seen corresponding path program 8 times [2024-09-13 00:32:43,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:43,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584505619] [2024-09-13 00:32:43,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:43,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:43,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064519576] [2024-09-13 00:32:43,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:32:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:43,583 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:43,584 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 00:32:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:32:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:43,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 91 conjuncts are in the unsatisfiable core [2024-09-13 00:32:43,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 219 proven. 170 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-13 00:32:45,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:32:45,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:32:45,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584505619] [2024-09-13 00:32:45,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:32:45,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064519576] [2024-09-13 00:32:45,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064519576] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:32:45,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:32:45,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:32:45,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195265343] [2024-09-13 00:32:45,725 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:32:45,726 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:32:45,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:32:45,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:32:45,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:32:45,727 INFO L87 Difference]: Start difference. First operand 510 states and 684 transitions. Second operand has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:47,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:32:47,649 INFO L93 Difference]: Finished difference Result 564 states and 752 transitions. [2024-09-13 00:32:47,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 00:32:47,650 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) Word has length 178 [2024-09-13 00:32:47,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:32:47,653 INFO L225 Difference]: With dead ends: 564 [2024-09-13 00:32:47,653 INFO L226 Difference]: Without dead ends: 562 [2024-09-13 00:32:47,653 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=166, Invalid=1166, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 00:32:47,653 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 48 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:32:47,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 749 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 00:32:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2024-09-13 00:32:48,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 557. [2024-09-13 00:32:48,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 302 states have (on average 1.1291390728476822) internal successors, (341), 309 states have internal predecessors, (341), 203 states have call successors, (203), 52 states have call predecessors, (203), 51 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:32:48,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 745 transitions. [2024-09-13 00:32:48,280 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 745 transitions. Word has length 178 [2024-09-13 00:32:48,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:32:48,281 INFO L474 AbstractCegarLoop]: Abstraction has 557 states and 745 transitions. [2024-09-13 00:32:48,281 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 10 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 9 states have call successors, (30) [2024-09-13 00:32:48,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:48,281 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 745 transitions. [2024-09-13 00:32:48,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:32:48,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:32:48,283 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:32:48,297 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-13 00:32:48,483 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-13 00:32:48,483 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:32:48,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:32:48,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1646591799, now seen corresponding path program 6 times [2024-09-13 00:32:48,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:32:48,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004539790] [2024-09-13 00:32:48,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:32:48,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:32:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:32:48,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711766349] [2024-09-13 00:32:48,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:32:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:32:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:32:48,514 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:32:48,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 00:32:48,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:32:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:32:48,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 00:32:48,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:32:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 127 proven. 132 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2024-09-13 00:32:56,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:02,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:02,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004539790] [2024-09-13 00:33:02,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:02,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711766349] [2024-09-13 00:33:02,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711766349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:02,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:02,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-13 00:33:02,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014010773] [2024-09-13 00:33:02,540 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:02,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 00:33:02,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:02,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 00:33:02,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=509, Unknown=1, NotChecked=0, Total=600 [2024-09-13 00:33:02,542 INFO L87 Difference]: Start difference. First operand 557 states and 745 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:33:10,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:33:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:12,856 INFO L93 Difference]: Finished difference Result 579 states and 763 transitions. [2024-09-13 00:33:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:33:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) Word has length 181 [2024-09-13 00:33:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:12,860 INFO L225 Difference]: With dead ends: 579 [2024-09-13 00:33:12,860 INFO L226 Difference]: Without dead ends: 572 [2024-09-13 00:33:12,861 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=133, Invalid=736, Unknown=1, NotChecked=0, Total=870 [2024-09-13 00:33:12,861 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:12,861 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 595 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 539 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2024-09-13 00:33:12,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-13 00:33:13,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 569. [2024-09-13 00:33:13,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 311 states have (on average 1.1221864951768488) internal successors, (349), 318 states have internal predecessors, (349), 203 states have call successors, (203), 55 states have call predecessors, (203), 54 states have return successors, (201), 195 states have call predecessors, (201), 201 states have call successors, (201) [2024-09-13 00:33:13,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 753 transitions. [2024-09-13 00:33:13,486 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 753 transitions. Word has length 181 [2024-09-13 00:33:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:13,487 INFO L474 AbstractCegarLoop]: Abstraction has 569 states and 753 transitions. [2024-09-13 00:33:13,487 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 15 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-13 00:33:13,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 753 transitions. [2024-09-13 00:33:13,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:33:13,489 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:13,489 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:13,507 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-13 00:33:13,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 00:33:13,690 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:13,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:13,691 INFO L85 PathProgramCache]: Analyzing trace with hash -468699879, now seen corresponding path program 7 times [2024-09-13 00:33:13,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:13,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357973075] [2024-09-13 00:33:13,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:13,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:13,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10880147] [2024-09-13 00:33:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:33:13,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:13,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:13,727 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:13,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 00:33:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:33:13,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-13 00:33:13,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 119 proven. 110 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2024-09-13 00:33:15,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:19,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:19,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357973075] [2024-09-13 00:33:19,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:19,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10880147] [2024-09-13 00:33:19,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10880147] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:19,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:19,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:33:19,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737533155] [2024-09-13 00:33:19,645 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:19,645 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:33:19,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:19,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:33:19,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:33:19,646 INFO L87 Difference]: Start difference. First operand 569 states and 753 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:33:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:23,016 INFO L93 Difference]: Finished difference Result 616 states and 823 transitions. [2024-09-13 00:33:23,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 00:33:23,017 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) Word has length 181 [2024-09-13 00:33:23,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:23,021 INFO L225 Difference]: With dead ends: 616 [2024-09-13 00:33:23,021 INFO L226 Difference]: Without dead ends: 609 [2024-09-13 00:33:23,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=204, Invalid=1518, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 00:33:23,023 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 47 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:23,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 639 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-13 00:33:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2024-09-13 00:33:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 582. [2024-09-13 00:33:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 319 states have (on average 1.1222570532915361) internal successors, (358), 326 states have internal predecessors, (358), 207 states have call successors, (207), 56 states have call predecessors, (207), 55 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-13 00:33:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 770 transitions. [2024-09-13 00:33:23,705 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 770 transitions. Word has length 181 [2024-09-13 00:33:23,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:23,705 INFO L474 AbstractCegarLoop]: Abstraction has 582 states and 770 transitions. [2024-09-13 00:33:23,705 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 18 states have internal predecessors, (39), 11 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (31), 10 states have call predecessors, (31), 10 states have call successors, (31) [2024-09-13 00:33:23,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 770 transitions. [2024-09-13 00:33:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2024-09-13 00:33:23,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:23,708 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:23,726 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:23,908 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:23,908 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:23,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1752760443, now seen corresponding path program 8 times [2024-09-13 00:33:23,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:23,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759981290] [2024-09-13 00:33:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:23,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2116740099] [2024-09-13 00:33:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:33:23,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:23,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:23,944 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:23,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 00:33:24,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:33:24,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:24,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 00:33:24,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 101 refuted. 0 times theorem prover too weak. 1095 trivial. 0 not checked. [2024-09-13 00:33:25,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:26,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759981290] [2024-09-13 00:33:26,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:26,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116740099] [2024-09-13 00:33:26,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116740099] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:26,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:26,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:33:26,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754621042] [2024-09-13 00:33:26,201 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:26,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:33:26,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:26,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:33:26,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:33:26,203 INFO L87 Difference]: Start difference. First operand 582 states and 770 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:33:28,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:28,286 INFO L93 Difference]: Finished difference Result 642 states and 850 transitions. [2024-09-13 00:33:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 00:33:28,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 181 [2024-09-13 00:33:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:28,290 INFO L225 Difference]: With dead ends: 642 [2024-09-13 00:33:28,290 INFO L226 Difference]: Without dead ends: 635 [2024-09-13 00:33:28,290 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 00:33:28,291 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 37 mSDsluCounter, 874 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 938 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:28,291 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 938 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 00:33:28,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2024-09-13 00:33:29,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 631. [2024-09-13 00:33:29,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 344 states have (on average 1.125) internal successors, (387), 351 states have internal predecessors, (387), 227 states have call successors, (227), 60 states have call predecessors, (227), 59 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:33:29,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 839 transitions. [2024-09-13 00:33:29,040 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 839 transitions. Word has length 181 [2024-09-13 00:33:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:29,040 INFO L474 AbstractCegarLoop]: Abstraction has 631 states and 839 transitions. [2024-09-13 00:33:29,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2024-09-13 00:33:29,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 839 transitions. [2024-09-13 00:33:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-09-13 00:33:29,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:29,042 INFO L216 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:29,058 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-13 00:33:29,243 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 00:33:29,243 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:29,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:29,243 INFO L85 PathProgramCache]: Analyzing trace with hash 58480029, now seen corresponding path program 9 times [2024-09-13 00:33:29,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:29,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599949675] [2024-09-13 00:33:29,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:29,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:29,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765132764] [2024-09-13 00:33:29,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:33:29,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:29,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:29,273 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:29,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 00:33:29,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 00:33:29,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:29,424 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-13 00:33:29,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:30,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 148 proven. 152 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2024-09-13 00:33:30,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:32,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 201 proven. 68 refuted. 0 times theorem prover too weak. 1048 trivial. 0 not checked. [2024-09-13 00:33:32,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599949675] [2024-09-13 00:33:32,672 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:32,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765132764] [2024-09-13 00:33:32,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765132764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:33:32,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:33:32,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2024-09-13 00:33:32,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192960507] [2024-09-13 00:33:32,673 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:32,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-13 00:33:32,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:32,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-13 00:33:32,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2024-09-13 00:33:32,675 INFO L87 Difference]: Start difference. First operand 631 states and 839 transitions. Second operand has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:33:40,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:40,892 INFO L93 Difference]: Finished difference Result 693 states and 919 transitions. [2024-09-13 00:33:40,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-13 00:33:40,893 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) Word has length 184 [2024-09-13 00:33:40,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:40,896 INFO L225 Difference]: With dead ends: 693 [2024-09-13 00:33:40,896 INFO L226 Difference]: Without dead ends: 685 [2024-09-13 00:33:40,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 334 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=783, Invalid=3639, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 00:33:40,898 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 130 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:40,898 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1141 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2024-09-13 00:33:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2024-09-13 00:33:41,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 646. [2024-09-13 00:33:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 356 states have (on average 1.1207865168539326) internal successors, (399), 363 states have internal predecessors, (399), 227 states have call successors, (227), 63 states have call predecessors, (227), 62 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:33:41,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 851 transitions. [2024-09-13 00:33:41,703 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 851 transitions. Word has length 184 [2024-09-13 00:33:41,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:41,703 INFO L474 AbstractCegarLoop]: Abstraction has 646 states and 851 transitions. [2024-09-13 00:33:41,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.064516129032258) internal successors, (64), 30 states have internal predecessors, (64), 15 states have call successors, (53), 2 states have call predecessors, (53), 3 states have return successors, (52), 14 states have call predecessors, (52), 13 states have call successors, (52) [2024-09-13 00:33:41,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 851 transitions. [2024-09-13 00:33:41,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:33:41,705 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:41,706 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:41,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-13 00:33:41,906 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:41,906 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:41,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:41,906 INFO L85 PathProgramCache]: Analyzing trace with hash 735942281, now seen corresponding path program 9 times [2024-09-13 00:33:41,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:41,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988684240] [2024-09-13 00:33:41,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:41,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:41,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1081727065] [2024-09-13 00:33:41,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 00:33:41,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:41,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:41,936 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:41,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 00:33:42,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 00:33:42,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:42,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-13 00:33:42,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 223 proven. 72 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2024-09-13 00:33:43,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:43,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:43,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988684240] [2024-09-13 00:33:43,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:43,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081727065] [2024-09-13 00:33:43,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081727065] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:43,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:43,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-13 00:33:43,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415859794] [2024-09-13 00:33:43,519 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:43,519 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-13 00:33:43,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-13 00:33:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-13 00:33:43,520 INFO L87 Difference]: Start difference. First operand 646 states and 851 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:33:44,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:44,935 INFO L93 Difference]: Finished difference Result 676 states and 875 transitions. [2024-09-13 00:33:44,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 00:33:44,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 197 [2024-09-13 00:33:44,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:44,939 INFO L225 Difference]: With dead ends: 676 [2024-09-13 00:33:44,939 INFO L226 Difference]: Without dead ends: 674 [2024-09-13 00:33:44,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-13 00:33:44,940 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 23 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:44,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 502 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 00:33:44,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2024-09-13 00:33:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 670. [2024-09-13 00:33:45,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 374 states have (on average 1.1149732620320856) internal successors, (417), 381 states have internal predecessors, (417), 227 states have call successors, (227), 69 states have call predecessors, (227), 68 states have return successors, (225), 219 states have call predecessors, (225), 225 states have call successors, (225) [2024-09-13 00:33:45,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 869 transitions. [2024-09-13 00:33:45,725 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 869 transitions. Word has length 197 [2024-09-13 00:33:45,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:45,725 INFO L474 AbstractCegarLoop]: Abstraction has 670 states and 869 transitions. [2024-09-13 00:33:45,725 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-13 00:33:45,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:45,726 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 869 transitions. [2024-09-13 00:33:45,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2024-09-13 00:33:45,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:45,728 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:45,746 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-13 00:33:45,932 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:45,933 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -659240853, now seen corresponding path program 10 times [2024-09-13 00:33:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104094771] [2024-09-13 00:33:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [808163180] [2024-09-13 00:33:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:33:45,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:45,957 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:45,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 00:33:46,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:33:46,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:46,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 00:33:46,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:47,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1645 backedges. 136 proven. 195 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2024-09-13 00:33:47,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:48,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104094771] [2024-09-13 00:33:48,070 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:48,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808163180] [2024-09-13 00:33:48,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808163180] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:48,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:48,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:33:48,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052769270] [2024-09-13 00:33:48,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:48,071 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:33:48,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:48,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:33:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2024-09-13 00:33:48,072 INFO L87 Difference]: Start difference. First operand 670 states and 869 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:33:49,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:49,885 INFO L93 Difference]: Finished difference Result 715 states and 929 transitions. [2024-09-13 00:33:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 00:33:49,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) Word has length 197 [2024-09-13 00:33:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:49,889 INFO L225 Difference]: With dead ends: 715 [2024-09-13 00:33:49,889 INFO L226 Difference]: Without dead ends: 713 [2024-09-13 00:33:49,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 180 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:33:49,890 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 38 mSDsluCounter, 913 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 982 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:49,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 982 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 00:33:49,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2024-09-13 00:33:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 677. [2024-09-13 00:33:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 378 states have (on average 1.1137566137566137) internal successors, (421), 386 states have internal predecessors, (421), 229 states have call successors, (229), 70 states have call predecessors, (229), 69 states have return successors, (227), 220 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-13 00:33:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 877 transitions. [2024-09-13 00:33:50,736 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 877 transitions. Word has length 197 [2024-09-13 00:33:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:50,737 INFO L474 AbstractCegarLoop]: Abstraction has 677 states and 877 transitions. [2024-09-13 00:33:50,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 11 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 00:33:50,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 877 transitions. [2024-09-13 00:33:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:33:50,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:50,740 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:50,757 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-13 00:33:50,941 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-13 00:33:50,941 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:50,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:50,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2074926545, now seen corresponding path program 11 times [2024-09-13 00:33:50,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:50,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834028744] [2024-09-13 00:33:50,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:50,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:50,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097166489] [2024-09-13 00:33:50,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:33:50,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:50,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:50,965 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:50,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 00:33:51,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-13 00:33:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:51,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-13 00:33:51,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 308 proven. 157 refuted. 0 times theorem prover too weak. 1188 trivial. 0 not checked. [2024-09-13 00:33:53,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:53,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834028744] [2024-09-13 00:33:53,755 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:53,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097166489] [2024-09-13 00:33:53,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097166489] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:53,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-13 00:33:53,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464023683] [2024-09-13 00:33:53,756 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:53,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 00:33:53,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 00:33:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2024-09-13 00:33:53,757 INFO L87 Difference]: Start difference. First operand 677 states and 877 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 12 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:33:56,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:33:56,584 INFO L93 Difference]: Finished difference Result 762 states and 988 transitions. [2024-09-13 00:33:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:33:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 12 states have call predecessors, (34), 10 states have call successors, (34) Word has length 200 [2024-09-13 00:33:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:33:56,588 INFO L225 Difference]: With dead ends: 762 [2024-09-13 00:33:56,588 INFO L226 Difference]: Without dead ends: 760 [2024-09-13 00:33:56,589 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:33:56,590 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 38 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 995 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:33:56,590 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 995 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-13 00:33:56,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-13 00:33:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 716. [2024-09-13 00:33:57,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 400 states have (on average 1.115) internal successors, (446), 407 states have internal predecessors, (446), 241 states have call successors, (241), 75 states have call predecessors, (241), 74 states have return successors, (239), 233 states have call predecessors, (239), 239 states have call successors, (239) [2024-09-13 00:33:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 926 transitions. [2024-09-13 00:33:57,487 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 926 transitions. Word has length 200 [2024-09-13 00:33:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:33:57,488 INFO L474 AbstractCegarLoop]: Abstraction has 716 states and 926 transitions. [2024-09-13 00:33:57,488 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 11 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (34), 12 states have call predecessors, (34), 10 states have call successors, (34) [2024-09-13 00:33:57,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 926 transitions. [2024-09-13 00:33:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-13 00:33:57,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:33:57,491 INFO L216 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:33:57,501 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-13 00:33:57,692 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:57,692 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:33:57,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:33:57,692 INFO L85 PathProgramCache]: Analyzing trace with hash 572704943, now seen corresponding path program 12 times [2024-09-13 00:33:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:33:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261127571] [2024-09-13 00:33:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:33:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:33:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:33:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361187257] [2024-09-13 00:33:57,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:33:57,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:33:57,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:33:57,720 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:33:57,722 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 00:33:57,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 00:33:57,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:33:57,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 00:33:57,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:33:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 207 proven. 132 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2024-09-13 00:33:59,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:33:59,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:33:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261127571] [2024-09-13 00:33:59,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:33:59,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361187257] [2024-09-13 00:33:59,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361187257] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:33:59,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:33:59,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2024-09-13 00:33:59,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925075611] [2024-09-13 00:33:59,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:33:59,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 00:33:59,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:33:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 00:33:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-09-13 00:33:59,737 INFO L87 Difference]: Start difference. First operand 716 states and 926 transitions. Second operand has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-13 00:34:02,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:34:02,542 INFO L93 Difference]: Finished difference Result 803 states and 1041 transitions. [2024-09-13 00:34:02,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 00:34:02,543 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) Word has length 200 [2024-09-13 00:34:02,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:34:02,547 INFO L225 Difference]: With dead ends: 803 [2024-09-13 00:34:02,547 INFO L226 Difference]: Without dead ends: 801 [2024-09-13 00:34:02,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 00:34:02,548 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 25 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:34:02,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 388 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 00:34:02,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-09-13 00:34:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 724. [2024-09-13 00:34:03,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 406 states have (on average 1.1133004926108374) internal successors, (452), 413 states have internal predecessors, (452), 241 states have call successors, (241), 77 states have call predecessors, (241), 76 states have return successors, (239), 233 states have call predecessors, (239), 239 states have call successors, (239) [2024-09-13 00:34:03,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 932 transitions. [2024-09-13 00:34:03,558 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 932 transitions. Word has length 200 [2024-09-13 00:34:03,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:34:03,558 INFO L474 AbstractCegarLoop]: Abstraction has 724 states and 932 transitions. [2024-09-13 00:34:03,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 9 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (25), 10 states have call predecessors, (25), 8 states have call successors, (25) [2024-09-13 00:34:03,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:03,558 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 932 transitions. [2024-09-13 00:34:03,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-09-13 00:34:03,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:34:03,560 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:34:03,566 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-13 00:34:03,760 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 00:34:03,760 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:34:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:34:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1842378248, now seen corresponding path program 10 times [2024-09-13 00:34:03,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:34:03,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898068040] [2024-09-13 00:34:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:34:03,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:34:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:34:03,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817358025] [2024-09-13 00:34:03,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 00:34:03,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:34:03,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:34:03,785 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:34:03,786 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-13 00:34:03,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 00:34:03,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:34:03,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-13 00:34:03,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:34:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 91 proven. 194 refuted. 0 times theorem prover too weak. 1476 trivial. 0 not checked. [2024-09-13 00:34:05,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:34:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 85 proven. 185 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2024-09-13 00:34:08,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:34:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898068040] [2024-09-13 00:34:08,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:34:08,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817358025] [2024-09-13 00:34:08,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817358025] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 00:34:08,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 00:34:08,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2024-09-13 00:34:08,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028882187] [2024-09-13 00:34:08,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 00:34:08,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 00:34:08,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:34:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 00:34:08,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 00:34:08,737 INFO L87 Difference]: Start difference. First operand 724 states and 932 transitions. Second operand has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2024-09-13 00:34:21,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:35:14,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:35:16,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-13 00:35:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:19,584 INFO L93 Difference]: Finished difference Result 1069 states and 1536 transitions. [2024-09-13 00:35:19,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-13 00:35:19,585 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) Word has length 203 [2024-09-13 00:35:19,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:19,589 INFO L225 Difference]: With dead ends: 1069 [2024-09-13 00:35:19,589 INFO L226 Difference]: Without dead ends: 1061 [2024-09-13 00:35:19,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 370 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=1765, Invalid=8741, Unknown=0, NotChecked=0, Total=10506 [2024-09-13 00:35:19,592 INFO L434 NwaCegarLoop]: 94 mSDtfsCounter, 226 mSDsluCounter, 1484 mSDsCounter, 0 mSdLazyCounter, 1983 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 1578 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:19,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 1578 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1983 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2024-09-13 00:35:19,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2024-09-13 00:35:21,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 832. [2024-09-13 00:35:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 442 states have (on average 1.1425339366515836) internal successors, (505), 449 states have internal predecessors, (505), 313 states have call successors, (313), 77 states have call predecessors, (313), 76 states have return successors, (311), 305 states have call predecessors, (311), 311 states have call successors, (311) [2024-09-13 00:35:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1129 transitions. [2024-09-13 00:35:21,094 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1129 transitions. Word has length 203 [2024-09-13 00:35:21,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:21,095 INFO L474 AbstractCegarLoop]: Abstraction has 832 states and 1129 transitions. [2024-09-13 00:35:21,095 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 21 states have call successors, (69), 3 states have call predecessors, (69), 3 states have return successors, (67), 19 states have call predecessors, (67), 19 states have call successors, (67) [2024-09-13 00:35:21,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:21,096 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1129 transitions. [2024-09-13 00:35:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2024-09-13 00:35:21,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:21,098 INFO L216 NwaCegarLoop]: trace histogram [29, 28, 28, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:21,116 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-13 00:35:21,302 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 00:35:21,303 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:21,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:21,303 INFO L85 PathProgramCache]: Analyzing trace with hash 337297370, now seen corresponding path program 11 times [2024-09-13 00:35:21,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:21,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176176051] [2024-09-13 00:35:21,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:21,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:21,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49643269] [2024-09-13 00:35:21,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 00:35:21,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:21,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:21,324 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:21,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-13 00:35:21,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-13 00:35:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:21,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 00:35:21,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:25,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1761 backedges. 97 proven. 173 refuted. 0 times theorem prover too weak. 1491 trivial. 0 not checked. [2024-09-13 00:35:25,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176176051] [2024-09-13 00:35:37,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49643269] [2024-09-13 00:35:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49643269] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:37,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-13 00:35:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110906107] [2024-09-13 00:35:37,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:37,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 00:35:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 00:35:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=716, Unknown=1, NotChecked=0, Total=812 [2024-09-13 00:35:37,064 INFO L87 Difference]: Start difference. First operand 832 states and 1129 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-13 00:35:48,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:48,327 INFO L93 Difference]: Finished difference Result 888 states and 1213 transitions. [2024-09-13 00:35:48,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 00:35:48,328 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) Word has length 203 [2024-09-13 00:35:48,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:48,332 INFO L225 Difference]: With dead ends: 888 [2024-09-13 00:35:48,332 INFO L226 Difference]: Without dead ends: 881 [2024-09-13 00:35:48,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=186, Invalid=1373, Unknown=1, NotChecked=0, Total=1560 [2024-09-13 00:35:48,333 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 40 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1134 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:48,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1014 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1134 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2024-09-13 00:35:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2024-09-13 00:35:49,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 836. [2024-09-13 00:35:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 445 states have (on average 1.1415730337078651) internal successors, (508), 452 states have internal predecessors, (508), 313 states have call successors, (313), 78 states have call predecessors, (313), 77 states have return successors, (311), 305 states have call predecessors, (311), 311 states have call successors, (311) [2024-09-13 00:35:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1132 transitions. [2024-09-13 00:35:49,871 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 1132 transitions. Word has length 203 [2024-09-13 00:35:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:49,871 INFO L474 AbstractCegarLoop]: Abstraction has 836 states and 1132 transitions. [2024-09-13 00:35:49,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (37), 2 states have call predecessors, (37), 2 states have return successors, (35), 10 states have call predecessors, (35), 10 states have call successors, (35) [2024-09-13 00:35:49,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 1132 transitions. [2024-09-13 00:35:49,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2024-09-13 00:35:49,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:49,874 INFO L216 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:49,890 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:50,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-13 00:35:50,075 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:50,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:50,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1772388170, now seen corresponding path program 13 times [2024-09-13 00:35:50,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:50,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978280724] [2024-09-13 00:35:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:50,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:50,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969642922] [2024-09-13 00:35:50,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:35:50,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:50,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:50,108 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-13 00:35:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:35:50,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-13 00:35:50,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:35:52,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 157 proven. 178 refuted. 0 times theorem prover too weak. 1815 trivial. 0 not checked. [2024-09-13 00:35:52,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:35:53,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:35:53,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978280724] [2024-09-13 00:35:53,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:35:53,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969642922] [2024-09-13 00:35:53,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969642922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:35:53,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:35:53,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2024-09-13 00:35:53,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218506372] [2024-09-13 00:35:53,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:35:53,800 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-13 00:35:53,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:35:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-13 00:35:53,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2024-09-13 00:35:53,801 INFO L87 Difference]: Start difference. First operand 836 states and 1132 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:35:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:35:57,434 INFO L93 Difference]: Finished difference Result 903 states and 1229 transitions. [2024-09-13 00:35:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 00:35:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) Word has length 219 [2024-09-13 00:35:57,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:35:57,439 INFO L225 Difference]: With dead ends: 903 [2024-09-13 00:35:57,439 INFO L226 Difference]: Without dead ends: 901 [2024-09-13 00:35:57,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:35:57,440 INFO L434 NwaCegarLoop]: 66 mSDtfsCounter, 47 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-13 00:35:57,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 878 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1443 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-13 00:35:57,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2024-09-13 00:35:58,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 846. [2024-09-13 00:35:58,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 450 states have (on average 1.1422222222222222) internal successors, (514), 457 states have internal predecessors, (514), 317 states have call successors, (317), 79 states have call predecessors, (317), 78 states have return successors, (315), 309 states have call predecessors, (315), 315 states have call successors, (315) [2024-09-13 00:35:58,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1146 transitions. [2024-09-13 00:35:58,982 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1146 transitions. Word has length 219 [2024-09-13 00:35:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:35:58,982 INFO L474 AbstractCegarLoop]: Abstraction has 846 states and 1146 transitions. [2024-09-13 00:35:58,982 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 12 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:35:58,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:58,982 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1146 transitions. [2024-09-13 00:35:58,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-09-13 00:35:58,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:35:58,984 INFO L216 NwaCegarLoop]: trace histogram [32, 31, 31, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:35:58,997 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-13 00:35:59,185 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 00:35:59,185 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:35:59,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:35:59,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1534598350, now seen corresponding path program 14 times [2024-09-13 00:35:59,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:35:59,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921439287] [2024-09-13 00:35:59,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:35:59,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:35:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:35:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [452778711] [2024-09-13 00:35:59,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:35:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:35:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:35:59,212 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:35:59,213 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-13 00:35:59,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:35:59,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:35:59,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-13 00:35:59,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:01,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2158 backedges. 162 proven. 265 refuted. 0 times theorem prover too weak. 1731 trivial. 0 not checked. [2024-09-13 00:36:01,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:01,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:01,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921439287] [2024-09-13 00:36:01,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:01,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452778711] [2024-09-13 00:36:01,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452778711] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:01,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:01,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2024-09-13 00:36:01,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660644429] [2024-09-13 00:36:01,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:01,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-13 00:36:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:01,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-13 00:36:01,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2024-09-13 00:36:01,528 INFO L87 Difference]: Start difference. First operand 846 states and 1146 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 13 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:36:04,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:36:04,989 INFO L93 Difference]: Finished difference Result 916 states and 1246 transitions. [2024-09-13 00:36:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 00:36:04,990 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 13 states have call predecessors, (38), 11 states have call successors, (38) Word has length 222 [2024-09-13 00:36:04,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:36:04,993 INFO L225 Difference]: With dead ends: 916 [2024-09-13 00:36:04,993 INFO L226 Difference]: Without dead ends: 914 [2024-09-13 00:36:04,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 00:36:04,994 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 54 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-13 00:36:04,994 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 838 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-13 00:36:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2024-09-13 00:36:06,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 856. [2024-09-13 00:36:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 455 states have (on average 1.1428571428571428) internal successors, (520), 462 states have internal predecessors, (520), 321 states have call successors, (321), 80 states have call predecessors, (321), 79 states have return successors, (319), 313 states have call predecessors, (319), 319 states have call successors, (319) [2024-09-13 00:36:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1160 transitions. [2024-09-13 00:36:06,642 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1160 transitions. Word has length 222 [2024-09-13 00:36:06,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:36:06,643 INFO L474 AbstractCegarLoop]: Abstraction has 856 states and 1160 transitions. [2024-09-13 00:36:06,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 21 states have internal predecessors, (45), 12 states have call successors, (40), 2 states have call predecessors, (40), 3 states have return successors, (38), 13 states have call predecessors, (38), 11 states have call successors, (38) [2024-09-13 00:36:06,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:06,643 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1160 transitions. [2024-09-13 00:36:06,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2024-09-13 00:36:06,646 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:36:06,646 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:36:06,664 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-13 00:36:06,847 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 00:36:06,847 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:36:06,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:36:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash -324643877, now seen corresponding path program 12 times [2024-09-13 00:36:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:36:06,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710384994] [2024-09-13 00:36:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:36:06,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:36:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:36:06,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923160246] [2024-09-13 00:36:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 00:36:06,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:36:06,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:36:06,884 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:36:06,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-13 00:36:07,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 00:36:07,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:36:07,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-13 00:36:07,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:36:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2283 backedges. 211 proven. 180 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2024-09-13 00:36:19,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:36:21,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:36:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710384994] [2024-09-13 00:36:21,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:36:21,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923160246] [2024-09-13 00:36:21,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923160246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:36:21,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:36:21,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-13 00:36:21,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478146770] [2024-09-13 00:36:21,438 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:36:21,438 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 00:36:21,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:36:21,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 00:36:21,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=396, Unknown=1, NotChecked=0, Total=462 [2024-09-13 00:36:21,439 INFO L87 Difference]: Start difference. First operand 856 states and 1160 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:36:24,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:26,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:31,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:36,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:40,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:45,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:52,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:55,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:36:59,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:03,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:05,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:09,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:14,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:16,722 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:20,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:24,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.29s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:28,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:32,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:34,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:36,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:41,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:46,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:52,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:37:56,733 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:01,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:05,290 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:09,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:14,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-13 00:38:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:15,415 INFO L93 Difference]: Finished difference Result 1013 states and 1400 transitions. [2024-09-13 00:38:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 00:38:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) Word has length 225 [2024-09-13 00:38:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:15,421 INFO L225 Difference]: With dead ends: 1013 [2024-09-13 00:38:15,421 INFO L226 Difference]: Without dead ends: 1006 [2024-09-13 00:38:15,422 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 226 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=112, Invalid=642, Unknown=2, NotChecked=0, Total=756 [2024-09-13 00:38:15,422 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 18 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 18 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 105.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 674 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 105.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:15,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 674 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 643 Invalid, 17 Unknown, 0 Unchecked, 105.7s Time] [2024-09-13 00:38:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2024-09-13 00:38:17,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 897. [2024-09-13 00:38:17,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 476 states have (on average 1.1365546218487395) internal successors, (541), 485 states have internal predecessors, (541), 337 states have call successors, (337), 84 states have call predecessors, (337), 83 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2024-09-13 00:38:17,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1213 transitions. [2024-09-13 00:38:17,202 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1213 transitions. Word has length 225 [2024-09-13 00:38:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:17,203 INFO L474 AbstractCegarLoop]: Abstraction has 897 states and 1213 transitions. [2024-09-13 00:38:17,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 7 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-13 00:38:17,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:17,203 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1213 transitions. [2024-09-13 00:38:17,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-09-13 00:38:17,206 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:17,206 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:38:17,220 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-13 00:38:17,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 00:38:17,410 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:17,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash 957873661, now seen corresponding path program 13 times [2024-09-13 00:38:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:17,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913030117] [2024-09-13 00:38:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:38:17,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335042334] [2024-09-13 00:38:17,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 00:38:17,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:17,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:17,432 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:17,434 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-13 00:38:17,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 00:38:17,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-13 00:38:17,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 00:38:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2291 backedges. 173 proven. 269 refuted. 0 times theorem prover too weak. 1849 trivial. 0 not checked. [2024-09-13 00:38:19,486 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 00:38:23,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 00:38:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913030117] [2024-09-13 00:38:23,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 00:38:23,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335042334] [2024-09-13 00:38:23,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335042334] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 00:38:23,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 00:38:23,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-13 00:38:23,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332897467] [2024-09-13 00:38:23,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 00:38:23,985 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 00:38:23,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 00:38:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 00:38:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=773, Unknown=1, NotChecked=0, Total=870 [2024-09-13 00:38:23,986 INFO L87 Difference]: Start difference. First operand 897 states and 1213 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 13 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-13 00:38:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 00:38:28,156 INFO L93 Difference]: Finished difference Result 963 states and 1305 transitions. [2024-09-13 00:38:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 00:38:28,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 13 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) Word has length 228 [2024-09-13 00:38:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 00:38:28,160 INFO L225 Difference]: With dead ends: 963 [2024-09-13 00:38:28,160 INFO L226 Difference]: Without dead ends: 956 [2024-09-13 00:38:28,161 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=176, Invalid=1463, Unknown=1, NotChecked=0, Total=1640 [2024-09-13 00:38:28,161 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 57 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 1544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-13 00:38:28,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 578 Invalid, 1544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-13 00:38:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2024-09-13 00:38:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 909. [2024-09-13 00:38:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 485 states have (on average 1.134020618556701) internal successors, (550), 494 states have internal predecessors, (550), 337 states have call successors, (337), 87 states have call predecessors, (337), 86 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2024-09-13 00:38:29,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1222 transitions. [2024-09-13 00:38:29,991 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1222 transitions. Word has length 228 [2024-09-13 00:38:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 00:38:29,992 INFO L474 AbstractCegarLoop]: Abstraction has 909 states and 1222 transitions. [2024-09-13 00:38:29,992 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 21 states have internal predecessors, (46), 13 states have call successors, (41), 2 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-13 00:38:29,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1222 transitions. [2024-09-13 00:38:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2024-09-13 00:38:29,995 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 00:38:29,995 INFO L216 NwaCegarLoop]: trace histogram [33, 32, 32, 8, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 00:38:30,014 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-13 00:38:30,196 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 00:38:30,196 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 00:38:30,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 00:38:30,196 INFO L85 PathProgramCache]: Analyzing trace with hash 674435035, now seen corresponding path program 14 times [2024-09-13 00:38:30,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 00:38:30,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946809219] [2024-09-13 00:38:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 00:38:30,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 00:38:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 00:38:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803232885] [2024-09-13 00:38:30,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 00:38:30,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 00:38:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 00:38:30,235 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 00:38:30,238 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-13 00:38:30,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 00:38:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 00:38:30,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 00:38:30,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... Killed by 15