./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:35:18,661 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:35:18,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:35:18,727 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:35:18,727 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:35:18,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:35:18,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:35:18,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:35:18,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:35:18,758 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:35:18,758 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:35:18,759 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:35:18,759 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:35:18,759 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:35:18,760 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:35:18,760 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:35:18,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:35:18,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:35:18,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:35:18,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:35:18,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:35:18,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:35:18,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:35:18,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:35:18,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:35:18,767 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:35:18,767 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:35:18,767 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:35:18,768 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:35:18,768 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:35:18,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:35:18,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:35:18,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:35:18,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:35:18,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:35:18,770 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:35:18,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:35:18,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:35:18,771 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:35:18,771 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:35:18,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:35:18,772 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:35:18,772 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:35:19,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:35:19,040 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:35:19,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:35:19,044 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:35:19,045 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:35:19,046 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2024-09-24 23:35:20,548 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:35:20,744 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:35:20,745 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2024-09-24 23:35:20,753 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c86d0d6fb/f923be1888834ea3bbf533e315b14823/FLAG0b4187f7f [2024-09-24 23:35:20,767 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c86d0d6fb/f923be1888834ea3bbf533e315b14823 [2024-09-24 23:35:20,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:35:20,771 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:35:20,773 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:35:20,773 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:35:20,779 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:35:20,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:35:20" (1/1) ... [2024-09-24 23:35:20,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f4d7b71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:20, skipping insertion in model container [2024-09-24 23:35:20,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:35:20" (1/1) ... [2024-09-24 23:35:20,804 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:35:20,963 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2024-09-24 23:35:20,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:35:20,993 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:35:21,015 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c[490,503] [2024-09-24 23:35:21,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:35:21,061 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:35:21,071 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21 WrapperNode [2024-09-24 23:35:21,071 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:35:21,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:35:21,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:35:21,073 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:35:21,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,089 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,096 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:35:21,096 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:35:21,097 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:35:21,097 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:35:21,097 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:35:21,105 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,105 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,107 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,119 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]. [2024-09-24 23:35:21,119 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,119 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,132 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,137 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,141 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,142 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:35:21,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:35:21,147 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:35:21,147 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:35:21,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (1/1) ... [2024-09-24 23:35:21,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:35:21,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:21,178 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) [2024-09-24 23:35:21,180 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 [2024-09-24 23:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:35:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:35:21,223 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:35:21,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:35:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:35:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:35:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:35:21,224 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:35:21,224 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:35:21,292 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:35:21,294 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:35:21,489 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:35:21,489 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:35:21,511 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:35:21,511 INFO L317 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-24 23:35:21,512 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:35:21 BoogieIcfgContainer [2024-09-24 23:35:21,512 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:35:21,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:35:21,515 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:35:21,518 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:35:21,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:35:20" (1/3) ... [2024-09-24 23:35:21,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a67870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:35:21, skipping insertion in model container [2024-09-24 23:35:21,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:35:21" (2/3) ... [2024-09-24 23:35:21,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62a67870 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:35:21, skipping insertion in model container [2024-09-24 23:35:21,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:35:21" (3/3) ... [2024-09-24 23:35:21,521 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2024-09-24 23:35:21,536 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:35:21,536 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:35:21,583 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:35:21,590 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;@de568dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:35:21,590 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:35:21,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-24 23:35:21,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:35:21,602 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:21,603 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:21,603 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:21,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash -681232038, now seen corresponding path program 1 times [2024-09-24 23:35:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:21,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911290182] [2024-09-24 23:35:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:21,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:21,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:21,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:21,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:21,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911290182] [2024-09-24 23:35:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911290182] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:35:21,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670615413] [2024-09-24 23:35:21,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:21,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:35:21,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:21,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:35:21,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:35:21,886 INFO L87 Difference]: Start difference. First operand has 38 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:35:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:21,912 INFO L93 Difference]: Finished difference Result 70 states and 112 transitions. [2024-09-24 23:35:21,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:35:21,914 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-24 23:35:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:21,921 INFO L225 Difference]: With dead ends: 70 [2024-09-24 23:35:21,921 INFO L226 Difference]: Without dead ends: 34 [2024-09-24 23:35:21,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:35:21,928 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:21,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-24 23:35:21,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-24 23:35:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-24 23:35:21,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-24 23:35:21,963 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 32 [2024-09-24 23:35:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:21,964 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-24 23:35:21,964 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:35:21,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-24 23:35:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:35:21,968 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:21,968 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:21,969 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:35:21,970 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:21,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2087558939, now seen corresponding path program 1 times [2024-09-24 23:35:21,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:21,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936485964] [2024-09-24 23:35:21,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:22,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:35:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936485964] [2024-09-24 23:35:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936485964] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:22,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:22,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-24 23:35:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963213817] [2024-09-24 23:35:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:22,303 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:35:22,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:22,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:35:22,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:22,305 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:35:22,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:22,426 INFO L93 Difference]: Finished difference Result 53 states and 68 transitions. [2024-09-24 23:35:22,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:35:22,426 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2024-09-24 23:35:22,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:22,428 INFO L225 Difference]: With dead ends: 53 [2024-09-24 23:35:22,429 INFO L226 Difference]: Without dead ends: 46 [2024-09-24 23:35:22,430 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:22,434 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:22,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 129 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:22,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-24 23:35:22,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2024-09-24 23:35:22,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-24 23:35:22,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-24 23:35:22,454 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 33 [2024-09-24 23:35:22,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:22,454 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-24 23:35:22,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:35:22,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:22,455 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-24 23:35:22,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:35:22,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:22,456 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:22,456 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:35:22,457 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:22,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:22,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2066421882, now seen corresponding path program 1 times [2024-09-24 23:35:22,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:22,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102401920] [2024-09-24 23:35:22,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:22,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:22,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70263452] [2024-09-24 23:35:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:22,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:22,491 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) [2024-09-24 23:35:22,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:35:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:22,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:35:22,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:22,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:35:22,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:22,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102401920] [2024-09-24 23:35:22,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:22,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70263452] [2024-09-24 23:35:22,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70263452] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:22,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:22,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105291813] [2024-09-24 23:35:22,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:22,703 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:22,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:22,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:22,705 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:35:22,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:22,778 INFO L93 Difference]: Finished difference Result 52 states and 66 transitions. [2024-09-24 23:35:22,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:22,779 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 36 [2024-09-24 23:35:22,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:22,781 INFO L225 Difference]: With dead ends: 52 [2024-09-24 23:35:22,781 INFO L226 Difference]: Without dead ends: 50 [2024-09-24 23:35:22,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:22,783 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:22,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 142 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-24 23:35:22,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2024-09-24 23:35:22,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-24 23:35:22,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 63 transitions. [2024-09-24 23:35:22,804 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 63 transitions. Word has length 36 [2024-09-24 23:35:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:22,805 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 63 transitions. [2024-09-24 23:35:22,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-24 23:35:22,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:22,805 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 63 transitions. [2024-09-24 23:35:22,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:35:22,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:22,808 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:22,827 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:23,009 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:23,009 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:23,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:23,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1918028984, now seen corresponding path program 1 times [2024-09-24 23:35:23,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:23,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065122293] [2024-09-24 23:35:23,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:23,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:23,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:23,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:35:23,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:23,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065122293] [2024-09-24 23:35:23,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065122293] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:23,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040176789] [2024-09-24 23:35:23,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:23,190 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) [2024-09-24 23:35:23,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:35:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:35:23,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:35:23,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:23,416 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:35:23,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040176789] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:23,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:35:23,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-24 23:35:23,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951370342] [2024-09-24 23:35:23,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:23,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:35:23,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:35:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:35:23,418 INFO L87 Difference]: Start difference. First operand 49 states and 63 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:35:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:23,637 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2024-09-24 23:35:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:35:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2024-09-24 23:35:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:23,642 INFO L225 Difference]: With dead ends: 102 [2024-09-24 23:35:23,642 INFO L226 Difference]: Without dead ends: 95 [2024-09-24 23:35:23,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 81 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:35:23,646 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 60 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:23,646 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 213 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-24 23:35:23,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 70. [2024-09-24 23:35:23,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-24 23:35:23,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2024-09-24 23:35:23,679 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 38 [2024-09-24 23:35:23,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:23,680 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2024-09-24 23:35:23,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:35:23,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:23,680 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2024-09-24 23:35:23,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:35:23,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:23,682 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:23,700 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:35:23,882 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:23,883 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:23,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:23,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1557854921, now seen corresponding path program 1 times [2024-09-24 23:35:23,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:23,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288529235] [2024-09-24 23:35:23,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:23,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:23,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2046639780] [2024-09-24 23:35:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:23,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:23,911 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) [2024-09-24 23:35:23,912 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:35:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:23,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-24 23:35:23,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:24,038 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:24,038 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:35:24,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288529235] [2024-09-24 23:35:24,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046639780] [2024-09-24 23:35:24,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046639780] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:24,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:24,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:24,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125620058] [2024-09-24 23:35:24,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:24,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:24,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:24,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:24,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:24,041 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:24,113 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2024-09-24 23:35:24,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:24,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2024-09-24 23:35:24,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:24,115 INFO L225 Difference]: With dead ends: 78 [2024-09-24 23:35:24,115 INFO L226 Difference]: Without dead ends: 76 [2024-09-24 23:35:24,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:24,117 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:24,117 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 139 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-24 23:35:24,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2024-09-24 23:35:24,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-24 23:35:24,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2024-09-24 23:35:24,144 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 41 [2024-09-24 23:35:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:24,147 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2024-09-24 23:35:24,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:24,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:24,148 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2024-09-24 23:35:24,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:35:24,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:24,150 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:24,166 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:35:24,350 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:24,351 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:24,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:24,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1651771191, now seen corresponding path program 1 times [2024-09-24 23:35:24,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:24,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214779783] [2024-09-24 23:35:24,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:24,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:24,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810339390] [2024-09-24 23:35:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:24,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:24,366 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) [2024-09-24 23:35:24,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:35:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:24,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:35:24,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:35:24,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:24,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:24,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214779783] [2024-09-24 23:35:24,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:24,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810339390] [2024-09-24 23:35:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810339390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:24,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:24,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2024-09-24 23:35:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688977073] [2024-09-24 23:35:24,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:24,994 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:35:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:35:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:35:24,995 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:35:26,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:26,414 INFO L93 Difference]: Finished difference Result 132 states and 180 transitions. [2024-09-24 23:35:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-24 23:35:26,415 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 41 [2024-09-24 23:35:26,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:26,416 INFO L225 Difference]: With dead ends: 132 [2024-09-24 23:35:26,416 INFO L226 Difference]: Without dead ends: 130 [2024-09-24 23:35:26,417 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2024-09-24 23:35:26,418 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 99 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:26,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 316 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:35:26,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-24 23:35:26,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 109. [2024-09-24 23:35:26,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 27 states have call successors, (27), 7 states have call predecessors, (27), 6 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-24 23:35:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 146 transitions. [2024-09-24 23:35:26,453 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 146 transitions. Word has length 41 [2024-09-24 23:35:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:26,454 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 146 transitions. [2024-09-24 23:35:26,454 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:35:26,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 146 transitions. [2024-09-24 23:35:26,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-24 23:35:26,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:26,456 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:26,474 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:26,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:26,657 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:26,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:26,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1994416550, now seen corresponding path program 1 times [2024-09-24 23:35:26,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:26,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377630110] [2024-09-24 23:35:26,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:26,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:26,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931188588] [2024-09-24 23:35:26,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:26,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:26,671 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) [2024-09-24 23:35:26,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:35:26,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:26,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:35:26,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:26,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-24 23:35:26,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:35:26,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377630110] [2024-09-24 23:35:26,773 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:26,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931188588] [2024-09-24 23:35:26,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931188588] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:26,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:26,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986658282] [2024-09-24 23:35:26,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:26,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:26,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:26,777 INFO L87 Difference]: Start difference. First operand 109 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:35:26,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:26,866 INFO L93 Difference]: Finished difference Result 155 states and 218 transitions. [2024-09-24 23:35:26,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:26,867 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2024-09-24 23:35:26,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:26,879 INFO L225 Difference]: With dead ends: 155 [2024-09-24 23:35:26,880 INFO L226 Difference]: Without dead ends: 153 [2024-09-24 23:35:26,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:26,881 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:26,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-24 23:35:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 147. [2024-09-24 23:35:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 93 states have internal predecessors, (118), 47 states have call successors, (47), 8 states have call predecessors, (47), 7 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-24 23:35:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 210 transitions. [2024-09-24 23:35:26,925 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 210 transitions. Word has length 46 [2024-09-24 23:35:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:26,925 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 210 transitions. [2024-09-24 23:35:26,925 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-24 23:35:26,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:26,926 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 210 transitions. [2024-09-24 23:35:26,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-24 23:35:26,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:26,927 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:26,944 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:27,127 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-24 23:35:27,127 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:27,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:27,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1824834714, now seen corresponding path program 1 times [2024-09-24 23:35:27,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:27,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123558259] [2024-09-24 23:35:27,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:27,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:27,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:27,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936713826] [2024-09-24 23:35:27,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:27,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:27,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:27,143 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) [2024-09-24 23:35:27,151 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:35:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:27,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 23:35:27,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:27,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:27,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:27,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123558259] [2024-09-24 23:35:27,360 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:27,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936713826] [2024-09-24 23:35:27,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936713826] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:27,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:35:27,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2024-09-24 23:35:27,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775268447] [2024-09-24 23:35:27,361 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:27,361 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:35:27,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:27,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:35:27,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:35:27,362 INFO L87 Difference]: Start difference. First operand 147 states and 210 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:27,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:27,543 INFO L93 Difference]: Finished difference Result 174 states and 246 transitions. [2024-09-24 23:35:27,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:35:27,543 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2024-09-24 23:35:27,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:27,546 INFO L225 Difference]: With dead ends: 174 [2024-09-24 23:35:27,546 INFO L226 Difference]: Without dead ends: 172 [2024-09-24 23:35:27,547 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:35:27,547 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 26 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:27,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 221 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:27,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-24 23:35:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-24 23:35:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 105 states have (on average 1.276190476190476) internal successors, (134), 106 states have internal predecessors, (134), 55 states have call successors, (55), 10 states have call predecessors, (55), 9 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-24 23:35:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 242 transitions. [2024-09-24 23:35:27,614 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 242 transitions. Word has length 46 [2024-09-24 23:35:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:27,615 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 242 transitions. [2024-09-24 23:35:27,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:27,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 242 transitions. [2024-09-24 23:35:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:35:27,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:27,617 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:27,636 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:35:27,823 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:27,824 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:27,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:27,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1598858537, now seen corresponding path program 1 times [2024-09-24 23:35:27,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:27,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781331257] [2024-09-24 23:35:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:27,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484532071] [2024-09-24 23:35:27,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:27,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:27,839 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) [2024-09-24 23:35:27,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:35:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:27,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:35:27,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:35:27,938 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:35:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:27,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781331257] [2024-09-24 23:35:27,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:27,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484532071] [2024-09-24 23:35:27,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484532071] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:27,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:27,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730483066] [2024-09-24 23:35:27,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:27,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:27,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:27,945 INFO L87 Difference]: Start difference. First operand 170 states and 242 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:35:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:28,070 INFO L93 Difference]: Finished difference Result 254 states and 385 transitions. [2024-09-24 23:35:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2024-09-24 23:35:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:28,073 INFO L225 Difference]: With dead ends: 254 [2024-09-24 23:35:28,073 INFO L226 Difference]: Without dead ends: 252 [2024-09-24 23:35:28,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:28,075 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:28,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 140 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-24 23:35:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 234. [2024-09-24 23:35:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 120 states have (on average 1.2416666666666667) internal successors, (149), 133 states have internal predecessors, (149), 103 states have call successors, (103), 11 states have call predecessors, (103), 10 states have return successors, (101), 89 states have call predecessors, (101), 101 states have call successors, (101) [2024-09-24 23:35:28,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 353 transitions. [2024-09-24 23:35:28,167 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 353 transitions. Word has length 51 [2024-09-24 23:35:28,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:28,167 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 353 transitions. [2024-09-24 23:35:28,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-24 23:35:28,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 353 transitions. [2024-09-24 23:35:28,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:35:28,168 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:28,168 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:28,185 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:35:28,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:28,373 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:28,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:28,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1695820567, now seen corresponding path program 2 times [2024-09-24 23:35:28,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:28,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64360068] [2024-09-24 23:35:28,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:28,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:28,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:35:28,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:35:28,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:28,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64360068] [2024-09-24 23:35:28,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64360068] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:28,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:28,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:28,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751587633] [2024-09-24 23:35:28,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:28,448 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:28,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:28,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:28,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:28,449 INFO L87 Difference]: Start difference. First operand 234 states and 353 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:28,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:28,567 INFO L93 Difference]: Finished difference Result 291 states and 429 transitions. [2024-09-24 23:35:28,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:35:28,567 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2024-09-24 23:35:28,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:28,570 INFO L225 Difference]: With dead ends: 291 [2024-09-24 23:35:28,570 INFO L226 Difference]: Without dead ends: 177 [2024-09-24 23:35:28,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:35:28,575 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 18 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:28,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 168 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:35:28,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-24 23:35:28,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 169. [2024-09-24 23:35:28,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 71 states have call successors, (71), 11 states have call predecessors, (71), 10 states have return successors, (69), 61 states have call predecessors, (69), 69 states have call successors, (69) [2024-09-24 23:35:28,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 243 transitions. [2024-09-24 23:35:28,637 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 243 transitions. Word has length 51 [2024-09-24 23:35:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:28,637 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 243 transitions. [2024-09-24 23:35:28,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-24 23:35:28,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 243 transitions. [2024-09-24 23:35:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-24 23:35:28,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:28,639 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:28,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-24 23:35:28,639 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:28,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1173987183, now seen corresponding path program 1 times [2024-09-24 23:35:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:28,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793867786] [2024-09-24 23:35:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:28,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204584459] [2024-09-24 23:35:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:28,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:28,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:28,657 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) [2024-09-24 23:35:28,658 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:35:28,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:28,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-24 23:35:28,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-24 23:35:29,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-24 23:35:30,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793867786] [2024-09-24 23:35:30,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204584459] [2024-09-24 23:35:30,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204584459] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:30,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:30,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-24 23:35:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423638703] [2024-09-24 23:35:30,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:30,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:35:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:35:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:35:30,826 INFO L87 Difference]: Start difference. First operand 169 states and 243 transitions. Second operand has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-24 23:35:35,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:35,541 INFO L93 Difference]: Finished difference Result 393 states and 601 transitions. [2024-09-24 23:35:35,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-24 23:35:35,542 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 63 [2024-09-24 23:35:35,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:35,545 INFO L225 Difference]: With dead ends: 393 [2024-09-24 23:35:35,545 INFO L226 Difference]: Without dead ends: 385 [2024-09-24 23:35:35,546 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-24 23:35:35,547 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 257 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:35,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 660 Invalid, 949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-24 23:35:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-24 23:35:35,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 234. [2024-09-24 23:35:35,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 131 states have (on average 1.2213740458015268) internal successors, (160), 138 states have internal predecessors, (160), 91 states have call successors, (91), 12 states have call predecessors, (91), 11 states have return successors, (89), 83 states have call predecessors, (89), 89 states have call successors, (89) [2024-09-24 23:35:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 340 transitions. [2024-09-24 23:35:35,661 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 340 transitions. Word has length 63 [2024-09-24 23:35:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:35,661 INFO L474 AbstractCegarLoop]: Abstraction has 234 states and 340 transitions. [2024-09-24 23:35:35,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 6 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2024-09-24 23:35:35,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 340 transitions. [2024-09-24 23:35:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-24 23:35:35,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:35,663 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:35,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:35,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:35,864 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:35,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1431506047, now seen corresponding path program 1 times [2024-09-24 23:35:35,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:35,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956214267] [2024-09-24 23:35:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:35,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:35:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:35:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:35:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:35:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:35:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-24 23:35:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:35:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:35:35,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-24 23:35:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:35:35,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:35:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:35:35,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:35,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956214267] [2024-09-24 23:35:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956214267] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:35:35,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:35:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:35:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766634511] [2024-09-24 23:35:35,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:35,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:35,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:35:35,992 INFO L87 Difference]: Start difference. First operand 234 states and 340 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-24 23:35:36,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:36,155 INFO L93 Difference]: Finished difference Result 399 states and 580 transitions. [2024-09-24 23:35:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:36,156 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 71 [2024-09-24 23:35:36,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:36,158 INFO L225 Difference]: With dead ends: 399 [2024-09-24 23:35:36,158 INFO L226 Difference]: Without dead ends: 243 [2024-09-24 23:35:36,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:35:36,159 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:36,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 129 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:36,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-24 23:35:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2024-09-24 23:35:36,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 129 states have (on average 1.2248062015503876) internal successors, (158), 130 states have internal predecessors, (158), 87 states have call successors, (87), 12 states have call predecessors, (87), 11 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-24 23:35:36,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 330 transitions. [2024-09-24 23:35:36,267 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 330 transitions. Word has length 71 [2024-09-24 23:35:36,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:36,267 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 330 transitions. [2024-09-24 23:35:36,267 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-24 23:35:36,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 330 transitions. [2024-09-24 23:35:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-24 23:35:36,269 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:36,269 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:36,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-24 23:35:36,269 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:36,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:36,269 INFO L85 PathProgramCache]: Analyzing trace with hash -683532968, now seen corresponding path program 1 times [2024-09-24 23:35:36,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:36,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201789060] [2024-09-24 23:35:36,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:36,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:36,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284544118] [2024-09-24 23:35:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:36,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:36,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:36,284 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) [2024-09-24 23:35:36,285 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:35:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:36,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-24 23:35:36,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2024-09-24 23:35:36,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:36,455 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-24 23:35:36,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201789060] [2024-09-24 23:35:36,455 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:36,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284544118] [2024-09-24 23:35:36,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284544118] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:35:36,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:35:36,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-24 23:35:36,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282794166] [2024-09-24 23:35:36,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:35:36,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:35:36,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:36,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:35:36,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:35:36,456 INFO L87 Difference]: Start difference. First operand 228 states and 330 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-24 23:35:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:36,613 INFO L93 Difference]: Finished difference Result 234 states and 335 transitions. [2024-09-24 23:35:36,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:35:36,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 73 [2024-09-24 23:35:36,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:36,616 INFO L225 Difference]: With dead ends: 234 [2024-09-24 23:35:36,616 INFO L226 Difference]: Without dead ends: 232 [2024-09-24 23:35:36,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:35:36,617 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 4 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:36,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 135 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:35:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-24 23:35:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2024-09-24 23:35:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 132 states have (on average 1.2196969696969697) internal successors, (161), 133 states have internal predecessors, (161), 87 states have call successors, (87), 13 states have call predecessors, (87), 12 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2024-09-24 23:35:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 333 transitions. [2024-09-24 23:35:36,702 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 333 transitions. Word has length 73 [2024-09-24 23:35:36,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:36,702 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 333 transitions. [2024-09-24 23:35:36,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-24 23:35:36,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:36,703 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 333 transitions. [2024-09-24 23:35:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-24 23:35:36,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:36,704 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:36,720 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:35:36,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-24 23:35:36,904 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:36,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1907222079, now seen corresponding path program 1 times [2024-09-24 23:35:36,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:36,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844272591] [2024-09-24 23:35:36,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:36,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:36,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993459820] [2024-09-24 23:35:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:36,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:36,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:36,920 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) [2024-09-24 23:35:36,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:35:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:36,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-24 23:35:36,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:37,490 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-24 23:35:37,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:35:38,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844272591] [2024-09-24 23:35:38,236 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:38,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993459820] [2024-09-24 23:35:38,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993459820] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:38,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:38,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2024-09-24 23:35:38,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403962651] [2024-09-24 23:35:38,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:38,237 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:35:38,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:38,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:35:38,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:35:38,238 INFO L87 Difference]: Start difference. First operand 232 states and 333 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-24 23:35:44,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:35:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:47,272 INFO L93 Difference]: Finished difference Result 385 states and 560 transitions. [2024-09-24 23:35:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-24 23:35:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 71 [2024-09-24 23:35:47,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:47,275 INFO L225 Difference]: With dead ends: 385 [2024-09-24 23:35:47,275 INFO L226 Difference]: Without dead ends: 383 [2024-09-24 23:35:47,276 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=503, Invalid=1849, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:35:47,277 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 153 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 111 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:47,277 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 447 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 585 Invalid, 1 Unknown, 0 Unchecked, 6.0s Time] [2024-09-24 23:35:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2024-09-24 23:35:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 339. [2024-09-24 23:35:47,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 197 states have (on average 1.2233502538071066) internal successors, (241), 198 states have internal predecessors, (241), 127 states have call successors, (127), 15 states have call predecessors, (127), 14 states have return successors, (125), 125 states have call predecessors, (125), 125 states have call successors, (125) [2024-09-24 23:35:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 493 transitions. [2024-09-24 23:35:47,455 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 493 transitions. Word has length 71 [2024-09-24 23:35:47,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:47,455 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 493 transitions. [2024-09-24 23:35:47,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 20 states have internal predecessors, (49), 6 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-24 23:35:47,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:47,456 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 493 transitions. [2024-09-24 23:35:47,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-09-24 23:35:47,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:47,457 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:47,475 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-24 23:35:47,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:35:47,658 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:47,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 992091053, now seen corresponding path program 2 times [2024-09-24 23:35:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258393424] [2024-09-24 23:35:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:47,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680050331] [2024-09-24 23:35:47,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:35:47,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:47,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:47,678 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) [2024-09-24 23:35:47,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:35:47,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:35:47,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:35:47,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:35:47,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-09-24 23:35:47,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-24 23:35:48,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:48,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258393424] [2024-09-24 23:35:48,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:48,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680050331] [2024-09-24 23:35:48,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680050331] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:48,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:48,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-24 23:35:48,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030808268] [2024-09-24 23:35:48,015 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:48,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:35:48,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:48,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:35:48,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:35:48,016 INFO L87 Difference]: Start difference. First operand 339 states and 493 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:35:48,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:48,755 INFO L93 Difference]: Finished difference Result 436 states and 631 transitions. [2024-09-24 23:35:48,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:35:48,756 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 71 [2024-09-24 23:35:48,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:48,759 INFO L225 Difference]: With dead ends: 436 [2024-09-24 23:35:48,759 INFO L226 Difference]: Without dead ends: 434 [2024-09-24 23:35:48,760 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:35:48,760 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:48,761 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 361 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:35:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-09-24 23:35:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2024-09-24 23:35:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 241 states have (on average 1.2282157676348548) internal successors, (296), 242 states have internal predecessors, (296), 159 states have call successors, (159), 17 states have call predecessors, (159), 16 states have return successors, (157), 157 states have call predecessors, (157), 157 states have call successors, (157) [2024-09-24 23:35:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 612 transitions. [2024-09-24 23:35:49,010 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 612 transitions. Word has length 71 [2024-09-24 23:35:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:49,010 INFO L474 AbstractCegarLoop]: Abstraction has 417 states and 612 transitions. [2024-09-24 23:35:49,010 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 5 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:35:49,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 612 transitions. [2024-09-24 23:35:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-24 23:35:49,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:49,012 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:49,019 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:35:49,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:35:49,212 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:49,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1837389712, now seen corresponding path program 1 times [2024-09-24 23:35:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:49,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913072404] [2024-09-24 23:35:49,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:49,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208328167] [2024-09-24 23:35:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:49,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:49,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:49,233 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) [2024-09-24 23:35:49,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:35:49,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:49,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-24 23:35:49,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2024-09-24 23:35:49,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-24 23:35:51,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:51,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913072404] [2024-09-24 23:35:51,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:51,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208328167] [2024-09-24 23:35:51,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208328167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:51,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:51,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2024-09-24 23:35:51,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502180423] [2024-09-24 23:35:51,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:51,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-24 23:35:51,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:51,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-24 23:35:51,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:35:51,877 INFO L87 Difference]: Start difference. First operand 417 states and 612 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-24 23:35:57,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:35:57,165 INFO L93 Difference]: Finished difference Result 558 states and 820 transitions. [2024-09-24 23:35:57,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-24 23:35:57,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 85 [2024-09-24 23:35:57,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:35:57,170 INFO L225 Difference]: With dead ends: 558 [2024-09-24 23:35:57,170 INFO L226 Difference]: Without dead ends: 554 [2024-09-24 23:35:57,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=737, Invalid=3045, Unknown=0, NotChecked=0, Total=3782 [2024-09-24 23:35:57,172 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 217 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:35:57,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 536 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-24 23:35:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2024-09-24 23:35:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 540. [2024-09-24 23:35:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 312 states have (on average 1.233974358974359) internal successors, (385), 313 states have internal predecessors, (385), 207 states have call successors, (207), 21 states have call predecessors, (207), 20 states have return successors, (205), 205 states have call predecessors, (205), 205 states have call successors, (205) [2024-09-24 23:35:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 797 transitions. [2024-09-24 23:35:57,522 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 797 transitions. Word has length 85 [2024-09-24 23:35:57,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:35:57,523 INFO L474 AbstractCegarLoop]: Abstraction has 540 states and 797 transitions. [2024-09-24 23:35:57,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2024-09-24 23:35:57,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:57,523 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 797 transitions. [2024-09-24 23:35:57,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-24 23:35:57,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:35:57,525 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:35:57,543 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:35:57,729 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:35:57,730 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:35:57,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:35:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1100697445, now seen corresponding path program 1 times [2024-09-24 23:35:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:35:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532251201] [2024-09-24 23:35:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:35:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:35:57,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327431675] [2024-09-24 23:35:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:35:57,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:35:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:35:57,766 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) [2024-09-24 23:35:57,768 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:35:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:35:57,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-24 23:35:57,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:35:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2024-09-24 23:35:58,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:35:58,419 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 26 proven. 14 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2024-09-24 23:35:58,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:35:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532251201] [2024-09-24 23:35:58,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:35:58,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327431675] [2024-09-24 23:35:58,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327431675] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:35:58,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:35:58,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-24 23:35:58,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768807701] [2024-09-24 23:35:58,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:35:58,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:35:58,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:35:58,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:35:58,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:35:58,421 INFO L87 Difference]: Start difference. First operand 540 states and 797 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-24 23:36:00,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:00,375 INFO L93 Difference]: Finished difference Result 1241 states and 1983 transitions. [2024-09-24 23:36:00,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:36:00,376 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 98 [2024-09-24 23:36:00,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:00,383 INFO L225 Difference]: With dead ends: 1241 [2024-09-24 23:36:00,383 INFO L226 Difference]: Without dead ends: 1239 [2024-09-24 23:36:00,384 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2024-09-24 23:36:00,384 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 153 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:00,385 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 375 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:36:00,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2024-09-24 23:36:01,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 1170. [2024-09-24 23:36:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 563 states have (on average 1.3285968028419184) internal successors, (748), 564 states have internal predecessors, (748), 583 states have call successors, (583), 24 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-24 23:36:01,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1912 transitions. [2024-09-24 23:36:01,419 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1912 transitions. Word has length 98 [2024-09-24 23:36:01,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:36:01,420 INFO L474 AbstractCegarLoop]: Abstraction has 1170 states and 1912 transitions. [2024-09-24 23:36:01,420 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 18 states have internal predecessors, (46), 8 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-24 23:36:01,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1912 transitions. [2024-09-24 23:36:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-24 23:36:01,423 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:36:01,424 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:36:01,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-24 23:36:01,627 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:36:01,628 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:36:01,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:01,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1927942246, now seen corresponding path program 3 times [2024-09-24 23:36:01,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:36:01,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503508860] [2024-09-24 23:36:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:36:01,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:36:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:36:01,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403835943] [2024-09-24 23:36:01,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:36:01,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:01,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:36:01,650 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) [2024-09-24 23:36:01,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:36:01,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:36:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:36:01,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:36:01,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:36:02,098 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-24 23:36:02,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:36:02,534 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 36 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2024-09-24 23:36:02,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:02,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503508860] [2024-09-24 23:36:02,534 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:36:02,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403835943] [2024-09-24 23:36:02,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403835943] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:36:02,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:36:02,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2024-09-24 23:36:02,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407625307] [2024-09-24 23:36:02,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:02,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-24 23:36:02,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:02,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-24 23:36:02,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:36:02,536 INFO L87 Difference]: Start difference. First operand 1170 states and 1912 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-24 23:36:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:05,137 INFO L93 Difference]: Finished difference Result 1369 states and 2252 transitions. [2024-09-24 23:36:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-24 23:36:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) Word has length 96 [2024-09-24 23:36:05,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:05,146 INFO L225 Difference]: With dead ends: 1369 [2024-09-24 23:36:05,147 INFO L226 Difference]: Without dead ends: 1365 [2024-09-24 23:36:05,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:36:05,148 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 63 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:05,149 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 485 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-24 23:36:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2024-09-24 23:36:06,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1172. [2024-09-24 23:36:06,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 565 states have (on average 1.3256637168141594) internal successors, (749), 565 states have internal predecessors, (749), 583 states have call successors, (583), 25 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-24 23:36:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1913 transitions. [2024-09-24 23:36:06,345 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1913 transitions. Word has length 96 [2024-09-24 23:36:06,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:36:06,346 INFO L474 AbstractCegarLoop]: Abstraction has 1172 states and 1913 transitions. [2024-09-24 23:36:06,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 7 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (21), 5 states have call predecessors, (21), 5 states have call successors, (21) [2024-09-24 23:36:06,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1913 transitions. [2024-09-24 23:36:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-24 23:36:06,348 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:36:06,348 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:36:06,355 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 23:36:06,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-24 23:36:06,549 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:36:06,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:06,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1336069028, now seen corresponding path program 2 times [2024-09-24 23:36:06,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:36:06,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530779046] [2024-09-24 23:36:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:36:06,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:36:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:36:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:36:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:36:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:36:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-24 23:36:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-24 23:36:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-24 23:36:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-24 23:36:06,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-24 23:36:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:36:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-24 23:36:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-24 23:36:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-24 23:36:06,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:36:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-24 23:36:06,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530779046] [2024-09-24 23:36:06,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530779046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:36:06,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205861972] [2024-09-24 23:36:06,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:36:06,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:06,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:36:06,831 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) [2024-09-24 23:36:06,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:36:06,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:36:06,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:36:06,926 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-24 23:36:06,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:36:06,973 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-24 23:36:06,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:36:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2024-09-24 23:36:07,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205861972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:36:07,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:36:07,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 11 [2024-09-24 23:36:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192649979] [2024-09-24 23:36:07,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:07,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:36:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:07,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:36:07,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:36:07,063 INFO L87 Difference]: Start difference. First operand 1172 states and 1913 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:36:08,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:08,682 INFO L93 Difference]: Finished difference Result 1305 states and 2119 transitions. [2024-09-24 23:36:08,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-24 23:36:08,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 98 [2024-09-24 23:36:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:08,691 INFO L225 Difference]: With dead ends: 1305 [2024-09-24 23:36:08,691 INFO L226 Difference]: Without dead ends: 1300 [2024-09-24 23:36:08,692 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 220 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2024-09-24 23:36:08,693 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 66 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:08,693 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 413 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:36:08,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2024-09-24 23:36:09,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1166. [2024-09-24 23:36:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 559 states have (on average 1.3273703041144902) internal successors, (742), 559 states have internal predecessors, (742), 583 states have call successors, (583), 25 states have call predecessors, (583), 23 states have return successors, (581), 581 states have call predecessors, (581), 581 states have call successors, (581) [2024-09-24 23:36:09,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1906 transitions. [2024-09-24 23:36:09,899 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1906 transitions. Word has length 98 [2024-09-24 23:36:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:36:09,900 INFO L474 AbstractCegarLoop]: Abstraction has 1166 states and 1906 transitions. [2024-09-24 23:36:09,900 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-24 23:36:09,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1906 transitions. [2024-09-24 23:36:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-24 23:36:09,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:36:09,903 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:36:09,910 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-24 23:36:10,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:10,104 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:36:10,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:10,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1998153044, now seen corresponding path program 2 times [2024-09-24 23:36:10,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:36:10,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711599863] [2024-09-24 23:36:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:36:10,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:36:10,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:36:10,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [56832040] [2024-09-24 23:36:10,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:36:10,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:10,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:36:10,128 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) [2024-09-24 23:36:10,130 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:36:10,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:36:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:36:10,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-24 23:36:10,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:36:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-24 23:36:10,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:36:13,877 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 50 proven. 38 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2024-09-24 23:36:13,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:13,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711599863] [2024-09-24 23:36:13,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:36:13,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56832040] [2024-09-24 23:36:13,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56832040] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:36:13,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:36:13,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 30 [2024-09-24 23:36:13,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303857663] [2024-09-24 23:36:13,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:13,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:36:13,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:13,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:36:13,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:36:13,880 INFO L87 Difference]: Start difference. First operand 1166 states and 1906 transitions. Second operand has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-24 23:36:29,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:29,823 INFO L93 Difference]: Finished difference Result 1456 states and 2338 transitions. [2024-09-24 23:36:29,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-24 23:36:29,824 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) Word has length 112 [2024-09-24 23:36:29,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:29,831 INFO L225 Difference]: With dead ends: 1456 [2024-09-24 23:36:29,831 INFO L226 Difference]: Without dead ends: 1450 [2024-09-24 23:36:29,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1349, Invalid=5293, Unknown=0, NotChecked=0, Total=6642 [2024-09-24 23:36:29,833 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 266 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1266 mSolverCounterSat, 328 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 328 IncrementalHoareTripleChecker+Valid, 1266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:29,833 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 963 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [328 Valid, 1266 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2024-09-24 23:36:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2024-09-24 23:36:31,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1393. [2024-09-24 23:36:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 687 states have (on average 1.3202328966521106) internal successors, (907), 687 states have internal predecessors, (907), 675 states have call successors, (675), 32 states have call predecessors, (675), 30 states have return successors, (673), 673 states have call predecessors, (673), 673 states have call successors, (673) [2024-09-24 23:36:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2255 transitions. [2024-09-24 23:36:31,688 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2255 transitions. Word has length 112 [2024-09-24 23:36:31,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:36:31,688 INFO L474 AbstractCegarLoop]: Abstraction has 1393 states and 2255 transitions. [2024-09-24 23:36:31,689 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 29 states have internal predecessors, (61), 10 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (29), 8 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-24 23:36:31,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2255 transitions. [2024-09-24 23:36:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-24 23:36:31,691 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:36:31,691 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:36:31,700 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-24 23:36:31,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:31,892 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:36:31,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2105883196, now seen corresponding path program 3 times [2024-09-24 23:36:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:36:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750410361] [2024-09-24 23:36:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:36:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:36:31,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:36:31,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1477905492] [2024-09-24 23:36:31,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:36:31,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:31,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:36:31,917 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) [2024-09-24 23:36:31,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 23:36:32,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-24 23:36:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:36:32,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-09-24 23:36:32,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:36:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-24 23:36:32,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:36:35,866 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-24 23:36:35,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:35,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750410361] [2024-09-24 23:36:35,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:36:35,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477905492] [2024-09-24 23:36:35,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477905492] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:36:35,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:36:35,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2024-09-24 23:36:35,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350265071] [2024-09-24 23:36:35,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:35,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-24 23:36:35,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:35,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-24 23:36:35,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:36:35,869 INFO L87 Difference]: Start difference. First operand 1393 states and 2255 transitions. Second operand has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-24 23:36:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:50,865 INFO L93 Difference]: Finished difference Result 1694 states and 2726 transitions. [2024-09-24 23:36:50,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-24 23:36:50,865 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 115 [2024-09-24 23:36:50,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:50,873 INFO L225 Difference]: With dead ends: 1694 [2024-09-24 23:36:50,873 INFO L226 Difference]: Without dead ends: 1688 [2024-09-24 23:36:50,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1724, Invalid=8376, Unknown=0, NotChecked=0, Total=10100 [2024-09-24 23:36:50,876 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 371 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:50,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 907 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-24 23:36:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2024-09-24 23:36:53,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1543. [2024-09-24 23:36:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1543 states, 763 states have (on average 1.3211009174311927) internal successors, (1008), 763 states have internal predecessors, (1008), 747 states have call successors, (747), 34 states have call predecessors, (747), 32 states have return successors, (745), 745 states have call predecessors, (745), 745 states have call successors, (745) [2024-09-24 23:36:53,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1543 states to 1543 states and 2500 transitions. [2024-09-24 23:36:53,277 INFO L78 Accepts]: Start accepts. Automaton has 1543 states and 2500 transitions. Word has length 115 [2024-09-24 23:36:53,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:36:53,277 INFO L474 AbstractCegarLoop]: Abstraction has 1543 states and 2500 transitions. [2024-09-24 23:36:53,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 27 states have internal predecessors, (62), 9 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2024-09-24 23:36:53,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:53,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1543 states and 2500 transitions. [2024-09-24 23:36:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-24 23:36:53,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:36:53,279 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:36:53,287 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-24 23:36:53,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:53,480 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:36:53,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:36:53,480 INFO L85 PathProgramCache]: Analyzing trace with hash 402888186, now seen corresponding path program 4 times [2024-09-24 23:36:53,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:36:53,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052319577] [2024-09-24 23:36:53,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:36:53,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:36:53,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:36:53,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88487515] [2024-09-24 23:36:53,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:36:53,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:36:53,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:36:53,514 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) [2024-09-24 23:36:53,517 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:36:53,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:36:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:36:53,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-24 23:36:53,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:36:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 56 proven. 48 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2024-09-24 23:36:54,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:36:56,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:36:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052319577] [2024-09-24 23:36:56,090 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:36:56,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88487515] [2024-09-24 23:36:56,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88487515] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:36:56,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:36:56,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2024-09-24 23:36:56,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547171709] [2024-09-24 23:36:56,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:36:56,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:36:56,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:36:56,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:36:56,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:36:56,092 INFO L87 Difference]: Start difference. First operand 1543 states and 2500 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-24 23:36:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:36:59,654 INFO L93 Difference]: Finished difference Result 1679 states and 2705 transitions. [2024-09-24 23:36:59,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-24 23:36:59,655 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 115 [2024-09-24 23:36:59,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:36:59,664 INFO L225 Difference]: With dead ends: 1679 [2024-09-24 23:36:59,664 INFO L226 Difference]: Without dead ends: 1674 [2024-09-24 23:36:59,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:36:59,666 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 87 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:36:59,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 610 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:36:59,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2024-09-24 23:37:02,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 1657. [2024-09-24 23:37:02,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1657 states, 817 states have (on average 1.3206854345165238) internal successors, (1079), 817 states have internal predecessors, (1079), 803 states have call successors, (803), 38 states have call predecessors, (803), 36 states have return successors, (801), 801 states have call predecessors, (801), 801 states have call successors, (801) [2024-09-24 23:37:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1657 states to 1657 states and 2683 transitions. [2024-09-24 23:37:02,345 INFO L78 Accepts]: Start accepts. Automaton has 1657 states and 2683 transitions. Word has length 115 [2024-09-24 23:37:02,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:37:02,345 INFO L474 AbstractCegarLoop]: Abstraction has 1657 states and 2683 transitions. [2024-09-24 23:37:02,346 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 21 states have internal predecessors, (43), 7 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-24 23:37:02,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:37:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1657 states and 2683 transitions. [2024-09-24 23:37:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-24 23:37:02,347 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:37:02,348 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:37:02,365 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-24 23:37:02,548 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-24 23:37:02,548 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:37:02,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:37:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 488840605, now seen corresponding path program 5 times [2024-09-24 23:37:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:37:02,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060281229] [2024-09-24 23:37:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:37:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:37:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:37:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [906585972] [2024-09-24 23:37:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:37:02,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:37:02,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:37:02,574 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) [2024-09-24 23:37:02,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:37:02,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-24 23:37:02,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:37:02,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-24 23:37:02,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:37:03,721 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-24 23:37:03,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:37:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 43 proven. 95 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2024-09-24 23:37:07,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:37:07,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060281229] [2024-09-24 23:37:07,923 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:37:07,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906585972] [2024-09-24 23:37:07,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906585972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:37:07,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:37:07,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 38 [2024-09-24 23:37:07,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793995872] [2024-09-24 23:37:07,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:37:07,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-24 23:37:07,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:37:07,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-24 23:37:07,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:37:07,925 INFO L87 Difference]: Start difference. First operand 1657 states and 2683 transitions. Second operand has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-24 23:37:49,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:37:49,098 INFO L93 Difference]: Finished difference Result 2425 states and 3907 transitions. [2024-09-24 23:37:49,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-09-24 23:37:49,099 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) Word has length 120 [2024-09-24 23:37:49,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:37:49,111 INFO L225 Difference]: With dead ends: 2425 [2024-09-24 23:37:49,112 INFO L226 Difference]: Without dead ends: 2419 [2024-09-24 23:37:49,117 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5529 ImplicationChecksByTransitivity, 31.7s TimeCoverageRelationStatistics Valid=3568, Invalid=14791, Unknown=1, NotChecked=0, Total=18360 [2024-09-24 23:37:49,118 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 444 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 535 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 2391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 535 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:37:49,118 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1344 Invalid, 2391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [535 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2024-09-24 23:37:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2419 states. [2024-09-24 23:37:53,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2419 to 1905. [2024-09-24 23:37:53,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1905 states, 962 states have (on average 1.3056133056133057) internal successors, (1256), 962 states have internal predecessors, (1256), 899 states have call successors, (899), 45 states have call predecessors, (899), 43 states have return successors, (897), 897 states have call predecessors, (897), 897 states have call successors, (897) [2024-09-24 23:37:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1905 states to 1905 states and 3052 transitions. [2024-09-24 23:37:53,135 INFO L78 Accepts]: Start accepts. Automaton has 1905 states and 3052 transitions. Word has length 120 [2024-09-24 23:37:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:37:53,135 INFO L474 AbstractCegarLoop]: Abstraction has 1905 states and 3052 transitions. [2024-09-24 23:37:53,136 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 10 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (29), 9 states have call predecessors, (29), 8 states have call successors, (29) [2024-09-24 23:37:53,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:37:53,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1905 states and 3052 transitions. [2024-09-24 23:37:53,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2024-09-24 23:37:53,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:37:53,139 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:37:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-24 23:37:53,339 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-24 23:37:53,339 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:37:53,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:37:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 43466790, now seen corresponding path program 6 times [2024-09-24 23:37:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:37:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801507221] [2024-09-24 23:37:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:37:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:37:53,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:37:53,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444043239] [2024-09-24 23:37:53,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:37:53,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:37:53,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:37:53,359 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) [2024-09-24 23:37:53,360 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:37:53,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-24 23:37:53,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:37:53,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-24 23:37:53,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:37:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-24 23:37:54,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:37:57,377 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 32 proven. 45 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2024-09-24 23:37:57,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:37:57,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801507221] [2024-09-24 23:37:57,377 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:37:57,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444043239] [2024-09-24 23:37:57,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444043239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:37:57,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:37:57,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2024-09-24 23:37:57,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591861595] [2024-09-24 23:37:57,378 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:37:57,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-24 23:37:57,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:37:57,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-24 23:37:57,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:37:57,380 INFO L87 Difference]: Start difference. First operand 1905 states and 3052 transitions. Second operand has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-24 23:38:13,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:38:13,982 INFO L93 Difference]: Finished difference Result 2302 states and 3686 transitions. [2024-09-24 23:38:13,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-24 23:38:13,983 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) Word has length 132 [2024-09-24 23:38:13,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:38:13,993 INFO L225 Difference]: With dead ends: 2302 [2024-09-24 23:38:13,993 INFO L226 Difference]: Without dead ends: 2296 [2024-09-24 23:38:13,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1277, Invalid=5695, Unknown=0, NotChecked=0, Total=6972 [2024-09-24 23:38:13,996 INFO L434 NwaCegarLoop]: 58 mSDtfsCounter, 211 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:38:13,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 792 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2024-09-24 23:38:13,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2024-09-24 23:38:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 2119. [2024-09-24 23:38:18,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 1065 states have (on average 1.3089201877934273) internal successors, (1394), 1065 states have internal predecessors, (1394), 1007 states have call successors, (1007), 48 states have call predecessors, (1007), 46 states have return successors, (1005), 1005 states have call predecessors, (1005), 1005 states have call successors, (1005) [2024-09-24 23:38:18,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 3406 transitions. [2024-09-24 23:38:18,361 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 3406 transitions. Word has length 132 [2024-09-24 23:38:18,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:38:18,361 INFO L474 AbstractCegarLoop]: Abstraction has 2119 states and 3406 transitions. [2024-09-24 23:38:18,361 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 25 states have internal predecessors, (56), 11 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (37), 9 states have call predecessors, (37), 9 states have call successors, (37) [2024-09-24 23:38:18,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:38:18,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 3406 transitions. [2024-09-24 23:38:18,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2024-09-24 23:38:18,365 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:38:18,365 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:38:18,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-24 23:38:18,566 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:38:18,567 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:38:18,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:38:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1666271485, now seen corresponding path program 7 times [2024-09-24 23:38:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:38:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121352833] [2024-09-24 23:38:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:38:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:38:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:38:18,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [792264171] [2024-09-24 23:38:18,606 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:38:18,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:38:18,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:38:18,608 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) [2024-09-24 23:38:18,609 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:38:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:38:18,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-24 23:38:18,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:38:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 76 proven. 76 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2024-09-24 23:38:20,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:38:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 70 proven. 73 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2024-09-24 23:38:25,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:38:25,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121352833] [2024-09-24 23:38:25,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:38:25,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792264171] [2024-09-24 23:38:25,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792264171] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:38:25,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:38:25,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20] total 41 [2024-09-24 23:38:25,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893551990] [2024-09-24 23:38:25,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:38:25,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-24 23:38:25,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:38:25,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-24 23:38:25,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:38:25,327 INFO L87 Difference]: Start difference. First operand 2119 states and 3406 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 39 states have internal predecessors, (82), 14 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2024-09-24 23:38:48,558 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:39:03,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []