./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.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 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 --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-27b4987-m [2024-09-21 12:08:09,723 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:08:09,799 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:08:09,804 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:08:09,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:08:09,835 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:08:09,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:08:09,836 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:08:09,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:08:09,837 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:08:09,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:08:09,838 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:08:09,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:08:09,840 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:08:09,840 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:08:09,842 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:08:09,842 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:08:09,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:08:09,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:08:09,843 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:08:09,843 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:08:09,844 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:08:09,844 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:08:09,845 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:08:09,845 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:08:09,849 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:08:09,849 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:08:09,850 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:08:09,850 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:08:09,850 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:08:09,850 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:08:09,850 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:08:09,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:08:09,851 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:08:09,851 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:08:09,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:08:09,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:08:09,852 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:08:09,852 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:08:09,852 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:08:09,852 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:08:09,853 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:08:09,853 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:08:10,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:08:10,130 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:08:10,133 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:08:10,134 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:08:10,135 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:08:10,136 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2024-09-21 12:08:11,667 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:08:11,837 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:08:11,838 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2024-09-21 12:08:11,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c6a643f4e/0ffa61ffcbf14d5198b94e0450ab33a4/FLAG99029e469 [2024-09-21 12:08:11,858 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c6a643f4e/0ffa61ffcbf14d5198b94e0450ab33a4 [2024-09-21 12:08:11,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:08:11,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:08:11,863 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:08:11,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:08:11,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:08:11,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:08:11" (1/1) ... [2024-09-21 12:08:11,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@be02a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:11, skipping insertion in model container [2024-09-21 12:08:11,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:08:11" (1/1) ... [2024-09-21 12:08:11,890 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:08:12,051 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/hard-ll_valuebound2.c[538,551] [2024-09-21 12:08:12,070 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:08:12,086 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:08:12,096 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/hard-ll_valuebound2.c[538,551] [2024-09-21 12:08:12,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:08:12,118 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:08:12,119 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12 WrapperNode [2024-09-21 12:08:12,119 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:08:12,121 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:08:12,121 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:08:12,121 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:08:12,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,138 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,149 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:08:12,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:08:12,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:08:12,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:08:12,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:08:12,163 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,164 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,165 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,181 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]. [2024-09-21 12:08:12,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,182 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,189 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,197 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:08:12,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:08:12,204 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:08:12,204 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:08:12,204 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (1/1) ... [2024-09-21 12:08:12,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:08:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:12,241 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) [2024-09-21 12:08:12,245 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 [2024-09-21 12:08:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:08:12,287 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-21 12:08:12,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-21 12:08:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:08:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:08:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:08:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:08:12,288 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:08:12,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:08:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:08:12,289 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 12:08:12,289 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 12:08:12,351 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:08:12,353 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:08:12,520 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-21 12:08:12,521 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:08:12,542 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:08:12,543 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 12:08:12,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:08:12 BoogieIcfgContainer [2024-09-21 12:08:12,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:08:12,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:08:12,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:08:12,548 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:08:12,548 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:08:11" (1/3) ... [2024-09-21 12:08:12,549 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebe0edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:08:12, skipping insertion in model container [2024-09-21 12:08:12,549 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:08:12" (2/3) ... [2024-09-21 12:08:12,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ebe0edb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:08:12, skipping insertion in model container [2024-09-21 12:08:12,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:08:12" (3/3) ... [2024-09-21 12:08:12,551 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2024-09-21 12:08:12,566 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:08:12,566 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:08:12,613 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:08:12,620 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;@55dc336b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:08:12,620 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:08:12,624 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 12:08:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 12:08:12,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:12,632 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:12,633 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:12,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:12,637 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-21 12:08:12,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:12,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197703828] [2024-09-21 12:08:12,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:12,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:12,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:12,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:12,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:12,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:12,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:08:12,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:12,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197703828] [2024-09-21 12:08:12,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197703828] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:12,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:08:12,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 12:08:12,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867319359] [2024-09-21 12:08:12,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:12,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 12:08:12,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 12:08:12,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:08:12,936 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:08:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:12,976 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-21 12:08:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 12:08:12,983 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-21 12:08:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:12,998 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:08:13,002 INFO L226 Difference]: Without dead ends: 32 [2024-09-21 12:08:13,006 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 12:08:13,012 INFO L434 NwaCegarLoop]: 44 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, 44 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 [2024-09-21 12:08:13,017 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:13,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-21 12:08:13,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-21 12:08:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 12:08:13,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-21 12:08:13,074 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-21 12:08:13,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:13,075 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-21 12:08:13,075 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, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-21 12:08:13,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,076 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-21 12:08:13,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-21 12:08:13,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:13,077 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:13,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:08:13,078 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:13,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,078 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-21 12:08:13,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:13,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696151339] [2024-09-21 12:08:13,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:13,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:08:13,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:13,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696151339] [2024-09-21 12:08:13,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696151339] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:13,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:08:13,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:08:13,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936634352] [2024-09-21 12:08:13,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:13,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:13,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:13,367 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-21 12:08:13,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:13,448 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-21 12:08:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-21 12:08:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:13,450 INFO L225 Difference]: With dead ends: 45 [2024-09-21 12:08:13,450 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 12:08:13,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:13,451 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:13,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:13,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 12:08:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-21 12:08:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 12:08:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-21 12:08:13,472 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-21 12:08:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:13,472 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-21 12:08:13,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-21 12:08:13,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,473 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-21 12:08:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-21 12:08:13,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:13,474 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:13,474 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 12:08:13,475 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:13,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,476 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-21 12:08:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:13,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223632970] [2024-09-21 12:08:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:13,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:13,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:08:13,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223632970] [2024-09-21 12:08:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223632970] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:13,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:08:13,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:08:13,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509536060] [2024-09-21 12:08:13,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:13,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:13,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:13,645 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:08:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:13,726 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-21 12:08:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:13,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-21 12:08:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:13,727 INFO L225 Difference]: With dead ends: 49 [2024-09-21 12:08:13,727 INFO L226 Difference]: Without dead ends: 47 [2024-09-21 12:08:13,728 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:13,729 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:13,731 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:08:13,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-21 12:08:13,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-21 12:08:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 12:08:13,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-21 12:08:13,746 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-21 12:08:13,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:13,746 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-21 12:08:13,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-21 12:08:13,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,747 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-21 12:08:13,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-21 12:08:13,747 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:13,748 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:13,748 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-21 12:08:13,748 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:13,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-21 12:08:13,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:13,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372932069] [2024-09-21 12:08:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:13,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:13,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507056939] [2024-09-21 12:08:13,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:13,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:13,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:13,772 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) [2024-09-21 12:08:13,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:08:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:13,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 12:08:13,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-21 12:08:13,904 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:08:13,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:13,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372932069] [2024-09-21 12:08:13,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:13,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507056939] [2024-09-21 12:08:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507056939] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:13,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:08:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:08:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443295282] [2024-09-21 12:08:13,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:13,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:13,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:13,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:13,911 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:08:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:13,997 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-21 12:08:13,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:13,998 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-21 12:08:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:14,000 INFO L225 Difference]: With dead ends: 66 [2024-09-21 12:08:14,001 INFO L226 Difference]: Without dead ends: 53 [2024-09-21 12:08:14,002 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:14,003 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:14,003 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:08:14,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-21 12:08:14,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-21 12:08:14,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 12:08:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-21 12:08:14,016 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-21 12:08:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:14,016 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-21 12:08:14,017 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-21 12:08:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:14,017 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-21 12:08:14,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-21 12:08:14,018 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:14,018 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:14,038 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-21 12:08:14,219 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:14,220 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:14,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-21 12:08:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:14,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961782518] [2024-09-21 12:08:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:14,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:14,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370842702] [2024-09-21 12:08:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:14,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:14,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:14,240 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) [2024-09-21 12:08:14,253 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:08:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:14,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-21 12:08:14,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-21 12:08:14,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-21 12:08:14,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961782518] [2024-09-21 12:08:14,619 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:14,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370842702] [2024-09-21 12:08:14,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370842702] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:14,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:08:14,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-21 12:08:14,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130475478] [2024-09-21 12:08:14,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:14,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-21 12:08:14,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-21 12:08:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-21 12:08:14,621 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:08:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:14,758 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-21 12:08:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:08:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-21 12:08:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:14,761 INFO L225 Difference]: With dead ends: 68 [2024-09-21 12:08:14,764 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:08:14,765 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-21 12:08:14,765 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:14,767 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:08:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:08:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-21 12:08:14,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 12:08:14,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-21 12:08:14,785 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-21 12:08:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:14,787 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-21 12:08:14,787 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-21 12:08:14,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:14,787 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-21 12:08:14,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 12:08:14,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:14,789 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 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] [2024-09-21 12:08:14,807 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 12:08:14,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:14,994 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:14,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:14,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-21 12:08:14,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:14,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576218925] [2024-09-21 12:08:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:14,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:15,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829597837] [2024-09-21 12:08:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:15,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:15,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:15,039 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) [2024-09-21 12:08:15,045 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:08:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-21 12:08:15,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-21 12:08:15,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-21 12:08:15,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576218925] [2024-09-21 12:08:15,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829597837] [2024-09-21 12:08:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829597837] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:15,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:08:15,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-21 12:08:15,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852498684] [2024-09-21 12:08:15,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:15,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:15,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:15,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:15,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-21 12:08:15,283 INFO L87 Difference]: Start difference. First operand 63 states and 80 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, (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) [2024-09-21 12:08:15,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:15,349 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-21 12:08:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:15,349 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, (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 54 [2024-09-21 12:08:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:15,350 INFO L225 Difference]: With dead ends: 73 [2024-09-21 12:08:15,350 INFO L226 Difference]: Without dead ends: 71 [2024-09-21 12:08:15,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-21 12:08:15,356 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:15,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-21 12:08:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-21 12:08:15,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-21 12:08:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-21 12:08:15,384 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-21 12:08:15,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:15,385 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-21 12:08:15,385 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, (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) [2024-09-21 12:08:15,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:15,386 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-21 12:08:15,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-21 12:08:15,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:15,389 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:15,407 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:08:15,590 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-21 12:08:15,591 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:15,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-21 12:08:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393071851] [2024-09-21 12:08:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:15,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:15,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:15,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:15,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:15,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 12:08:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-21 12:08:15,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:15,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393071851] [2024-09-21 12:08:15,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393071851] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:15,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:08:15,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:08:15,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182783180] [2024-09-21 12:08:15,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:15,788 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:15,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:15,789 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-21 12:08:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:15,872 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-21 12:08:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:15,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-21 12:08:15,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:15,874 INFO L225 Difference]: With dead ends: 78 [2024-09-21 12:08:15,875 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:08:15,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:15,876 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:15,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:08:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-21 12:08:15,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 12:08:15,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-21 12:08:15,899 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-21 12:08:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:15,899 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-21 12:08:15,899 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-21 12:08:15,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:15,901 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-21 12:08:15,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-21 12:08:15,904 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:15,905 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:15,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-21 12:08:15,905 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:15,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:15,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-21 12:08:15,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:15,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685259551] [2024-09-21 12:08:15,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:15,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1078433390] [2024-09-21 12:08:15,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:15,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:15,945 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) [2024-09-21 12:08:15,947 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:08:16,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:16,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-21 12:08:16,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-21 12:08:16,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-21 12:08:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:18,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685259551] [2024-09-21 12:08:18,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:18,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078433390] [2024-09-21 12:08:18,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078433390] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:18,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:08:18,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-21 12:08:18,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951207720] [2024-09-21 12:08:18,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:18,541 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:08:18,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:18,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:08:18,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:08:18,542 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-21 12:08:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:19,902 INFO L93 Difference]: Finished difference Result 152 states and 208 transitions. [2024-09-21 12:08:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 12:08:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 74 [2024-09-21 12:08:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:19,905 INFO L225 Difference]: With dead ends: 152 [2024-09-21 12:08:19,905 INFO L226 Difference]: Without dead ends: 129 [2024-09-21 12:08:19,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:08:19,907 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:19,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 308 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:08:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-21 12:08:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2024-09-21 12:08:19,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-21 12:08:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-21 12:08:19,944 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-21 12:08:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:19,945 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-21 12:08:19,945 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-21 12:08:19,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-21 12:08:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 12:08:19,947 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:19,947 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 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, 1, 1] [2024-09-21 12:08:19,964 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:08:20,147 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:20,148 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:20,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:20,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-21 12:08:20,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:20,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603777892] [2024-09-21 12:08:20,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:20,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:20,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452992015] [2024-09-21 12:08:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:20,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:20,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:20,176 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) [2024-09-21 12:08:20,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:08:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:20,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-21 12:08:20,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-21 12:08:20,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-21 12:08:21,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603777892] [2024-09-21 12:08:21,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452992015] [2024-09-21 12:08:21,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452992015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:21,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:08:21,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-21 12:08:21,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248451566] [2024-09-21 12:08:21,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:21,290 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:08:21,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:21,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:08:21,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:08:21,293 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-21 12:08:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:21,830 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-21 12:08:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:08:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-21 12:08:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:21,834 INFO L225 Difference]: With dead ends: 145 [2024-09-21 12:08:21,834 INFO L226 Difference]: Without dead ends: 111 [2024-09-21 12:08:21,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:08:21,836 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:21,837 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 350 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:08:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-21 12:08:21,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-21 12:08:21,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-21 12:08:21,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-21 12:08:21,884 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-21 12:08:21,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:21,885 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-21 12:08:21,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-21 12:08:21,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:21,885 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-21 12:08:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-21 12:08:21,890 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:21,890 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 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] [2024-09-21 12:08:21,908 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 12:08:22,090 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:22,091 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:22,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-21 12:08:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:22,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768796425] [2024-09-21 12:08:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:22,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:22,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:22,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:22,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:08:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,267 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 12:08:22,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 12:08:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-21 12:08:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-21 12:08:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-21 12:08:22,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768796425] [2024-09-21 12:08:22,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768796425] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:22,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948213551] [2024-09-21 12:08:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:08:22,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:22,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:22,316 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) [2024-09-21 12:08:22,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:08:22,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:08:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:08:22,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-21 12:08:22,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:22,400 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-21 12:08:22,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-21 12:08:22,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948213551] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:22,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:08:22,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-21 12:08:22,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214731679] [2024-09-21 12:08:22,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:22,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:22,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:22,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:22,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:22,490 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-21 12:08:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:22,571 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-21 12:08:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-21 12:08:22,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-21 12:08:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:22,577 INFO L225 Difference]: With dead ends: 124 [2024-09-21 12:08:22,577 INFO L226 Difference]: Without dead ends: 102 [2024-09-21 12:08:22,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:08:22,578 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:22,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:22,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-21 12:08:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-21 12:08:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-21 12:08:22,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-21 12:08:22,616 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-21 12:08:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:22,618 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-21 12:08:22,618 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-21 12:08:22,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:22,618 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-21 12:08:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-21 12:08:22,621 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:22,622 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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, 1, 1, 1, 1] [2024-09-21 12:08:22,640 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 12:08:22,822 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-21 12:08:22,823 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:22,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:22,824 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-21 12:08:22,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:22,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163347682] [2024-09-21 12:08:22,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:22,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:22,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:23,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:23,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:08:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 12:08:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 12:08:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-21 12:08:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-21 12:08:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-21 12:08:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,117 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-21 12:08:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163347682] [2024-09-21 12:08:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163347682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981604026] [2024-09-21 12:08:23,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:23,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:23,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:23,121 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) [2024-09-21 12:08:23,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:08:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:23,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-21 12:08:23,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-21 12:08:23,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:23,839 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-21 12:08:23,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981604026] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:23,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:08:23,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-21 12:08:23,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145248373] [2024-09-21 12:08:23,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:23,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:08:23,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:23,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:08:23,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:08:23,841 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-21 12:08:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:24,237 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-21 12:08:24,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:08:24,238 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-21 12:08:24,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:24,240 INFO L225 Difference]: With dead ends: 117 [2024-09-21 12:08:24,240 INFO L226 Difference]: Without dead ends: 100 [2024-09-21 12:08:24,240 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:08:24,241 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:24,241 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 389 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:08:24,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-21 12:08:24,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-21 12:08:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-21 12:08:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-21 12:08:24,266 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-21 12:08:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:24,267 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-21 12:08:24,267 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-21 12:08:24,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-21 12:08:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-21 12:08:24,268 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:24,268 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:24,285 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:08:24,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:24,473 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:24,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:24,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-21 12:08:24,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:24,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701783439] [2024-09-21 12:08:24,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:24,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:24,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:24,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:24,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:24,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:08:24,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 12:08:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 12:08:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 12:08:24,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 12:08:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-21 12:08:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-21 12:08:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-21 12:08:24,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:24,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701783439] [2024-09-21 12:08:24,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701783439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:24,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489365519] [2024-09-21 12:08:24,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:24,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:24,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:24,611 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) [2024-09-21 12:08:24,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:08:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:24,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-21 12:08:24,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-21 12:08:24,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:08:24,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489365519] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:08:24,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:08:24,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-21 12:08:24,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392200477] [2024-09-21 12:08:24,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:08:24,701 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:08:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:08:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:24,703 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-21 12:08:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:24,767 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-21 12:08:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:08:24,767 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-21 12:08:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:24,769 INFO L225 Difference]: With dead ends: 100 [2024-09-21 12:08:24,769 INFO L226 Difference]: Without dead ends: 88 [2024-09-21 12:08:24,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-21 12:08:24,770 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:24,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 120 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:08:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-21 12:08:24,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-21 12:08:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-21 12:08:24,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-21 12:08:24,820 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-21 12:08:24,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:24,821 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-21 12:08:24,821 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), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-21 12:08:24,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:24,821 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-21 12:08:24,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-21 12:08:24,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:24,822 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 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] [2024-09-21 12:08:24,838 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:08:25,023 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:25,024 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:25,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:25,024 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-21 12:08:25,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:25,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203363443] [2024-09-21 12:08:25,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:25,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:08:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,629 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 12:08:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 12:08:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 12:08:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 12:08:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-21 12:08:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-21 12:08:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-21 12:08:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-21 12:08:25,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203363443] [2024-09-21 12:08:25,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203363443] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:25,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971373563] [2024-09-21 12:08:25,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:08:25,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:25,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:25,723 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) [2024-09-21 12:08:25,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:08:25,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:08:25,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:08:25,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-21 12:08:25,819 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:26,271 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-21 12:08:26,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:27,039 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-21 12:08:27,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971373563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:27,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:08:27,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2024-09-21 12:08:27,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905459426] [2024-09-21 12:08:27,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:27,040 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-21 12:08:27,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:27,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-21 12:08:27,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:08:27,042 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) [2024-09-21 12:08:27,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:27,632 INFO L93 Difference]: Finished difference Result 153 states and 189 transitions. [2024-09-21 12:08:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:08:27,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) Word has length 104 [2024-09-21 12:08:27,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:27,637 INFO L225 Difference]: With dead ends: 153 [2024-09-21 12:08:27,637 INFO L226 Difference]: Without dead ends: 101 [2024-09-21 12:08:27,638 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2024-09-21 12:08:27,638 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:27,639 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 502 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:08:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-21 12:08:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2024-09-21 12:08:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-21 12:08:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2024-09-21 12:08:27,681 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 104 [2024-09-21 12:08:27,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:27,682 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2024-09-21 12:08:27,682 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) [2024-09-21 12:08:27,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:27,682 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2024-09-21 12:08:27,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 12:08:27,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:27,684 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 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] [2024-09-21 12:08:27,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 12:08:27,884 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 [2024-09-21 12:08:27,885 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:27,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:27,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1394769075, now seen corresponding path program 1 times [2024-09-21 12:08:27,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:27,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253043771] [2024-09-21 12:08:27,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:27,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:27,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926483168] [2024-09-21 12:08:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:27,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:27,942 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) [2024-09-21 12:08:27,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:08:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:28,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-21 12:08:28,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:28,569 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-21 12:08:28,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-21 12:08:30,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:30,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253043771] [2024-09-21 12:08:30,714 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:30,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926483168] [2024-09-21 12:08:30,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926483168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:30,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 12:08:30,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2024-09-21 12:08:30,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021144263] [2024-09-21 12:08:30,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:30,715 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-21 12:08:30,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:30,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-21 12:08:30,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-09-21 12:08:30,716 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-21 12:08:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:31,538 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-09-21 12:08:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:08:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) Word has length 109 [2024-09-21 12:08:31,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:31,540 INFO L225 Difference]: With dead ends: 117 [2024-09-21 12:08:31,540 INFO L226 Difference]: Without dead ends: 95 [2024-09-21 12:08:31,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 12:08:31,541 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:31,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-21 12:08:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-21 12:08:31,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-21 12:08:31,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-21 12:08:31,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2024-09-21 12:08:31,566 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 109 [2024-09-21 12:08:31,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:31,567 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2024-09-21 12:08:31,568 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-21 12:08:31,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2024-09-21 12:08:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-21 12:08:31,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:31,569 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:31,586 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:08:31,770 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 [2024-09-21 12:08:31,770 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:31,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:31,771 INFO L85 PathProgramCache]: Analyzing trace with hash 733497000, now seen corresponding path program 1 times [2024-09-21 12:08:31,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:31,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635133244] [2024-09-21 12:08:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:31,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:31,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-21 12:08:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768693607] [2024-09-21 12:08:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:31,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:31,794 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) [2024-09-21 12:08:31,795 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:08:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:31,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-21 12:08:31,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2024-09-21 12:08:32,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:34,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:34,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635133244] [2024-09-21 12:08:34,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-21 12:08:34,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768693607] [2024-09-21 12:08:34,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768693607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:34,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:08:34,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-21 12:08:34,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314577357] [2024-09-21 12:08:34,192 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:34,193 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 12:08:34,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:34,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 12:08:34,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:08:34,194 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-21 12:08:34,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:34,696 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2024-09-21 12:08:34,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:08:34,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 115 [2024-09-21 12:08:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:34,698 INFO L225 Difference]: With dead ends: 101 [2024-09-21 12:08:34,698 INFO L226 Difference]: Without dead ends: 97 [2024-09-21 12:08:34,698 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-21 12:08:34,698 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:34,699 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 405 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 12:08:34,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-21 12:08:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-09-21 12:08:34,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.0) internal successors, (60), 60 states have internal predecessors, (60), 22 states have call successors, (22), 16 states have call predecessors, (22), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-21 12:08:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2024-09-21 12:08:34,728 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 115 [2024-09-21 12:08:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:34,730 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2024-09-21 12:08:34,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-21 12:08:34,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2024-09-21 12:08:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-21 12:08:34,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:08:34,733 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:34,750 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:08:34,937 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 [2024-09-21 12:08:34,938 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:08:34,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash 265983484, now seen corresponding path program 1 times [2024-09-21 12:08:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:08:34,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079997322] [2024-09-21 12:08:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:34,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:08:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:08:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:08:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 12:08:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 12:08:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 12:08:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 12:08:35,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 12:08:35,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 12:08:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 12:08:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 12:08:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 12:08:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 12:08:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 12:08:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 12:08:35,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-21 12:08:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-21 12:08:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-21 12:08:35,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-21 12:08:35,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-21 12:08:35,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-21 12:08:35,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-21 12:08:35,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:08:35,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079997322] [2024-09-21 12:08:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079997322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:08:35,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899878616] [2024-09-21 12:08:35,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:08:35,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:08:35,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:08:35,392 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) [2024-09-21 12:08:35,393 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:08:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:08:35,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-21 12:08:35,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:08:35,834 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-21 12:08:35,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:08:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-21 12:08:36,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899878616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:08:36,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:08:36,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-09-21 12:08:36,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219352058] [2024-09-21 12:08:36,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:08:36,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 12:08:36,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:08:36,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 12:08:36,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:08:36,702 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-21 12:08:37,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:08:37,131 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2024-09-21 12:08:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:08:37,131 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-21 12:08:37,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:08:37,132 INFO L225 Difference]: With dead ends: 97 [2024-09-21 12:08:37,132 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:08:37,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:08:37,133 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 12:08:37,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 354 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 12:08:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:08:37,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:08:37,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-21 12:08:37,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:08:37,135 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2024-09-21 12:08:37,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:08:37,135 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:08:37,136 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-21 12:08:37,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:08:37,136 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:08:37,136 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:08:37,139 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:08:37,157 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-21 12:08:37,343 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 [2024-09-21 12:08:37,347 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:08:37,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:08:39,252 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:08:39,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:08:39 BoogieIcfgContainer [2024-09-21 12:08:39,280 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 12:08:39,280 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 12:08:39,281 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 12:08:39,281 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 12:08:39,281 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:08:12" (3/4) ... [2024-09-21 12:08:39,283 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 12:08:39,335 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 12:08:39,336 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 12:08:39,336 INFO L158 Benchmark]: Toolchain (without parser) took 27475.09ms. Allocated memory was 169.9MB in the beginning and 469.8MB in the end (delta: 299.9MB). Free memory was 101.6MB in the beginning and 324.5MB in the end (delta: -222.9MB). Peak memory consumption was 80.0MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,337 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:08:39,337 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.98ms. Allocated memory is still 169.9MB. Free memory was 101.2MB in the beginning and 89.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,337 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.81ms. Allocated memory is still 169.9MB. Free memory was 89.4MB in the beginning and 88.6MB in the end (delta: 816.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,337 INFO L158 Benchmark]: Boogie Preprocessor took 52.84ms. Allocated memory is still 169.9MB. Free memory was 88.4MB in the beginning and 86.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:08:39,338 INFO L158 Benchmark]: RCFGBuilder took 339.78ms. Allocated memory is still 169.9MB. Free memory was 86.5MB in the beginning and 72.3MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,339 INFO L158 Benchmark]: TraceAbstraction took 26735.12ms. Allocated memory was 169.9MB in the beginning and 469.8MB in the end (delta: 299.9MB). Free memory was 71.9MB in the beginning and 327.7MB in the end (delta: -255.8MB). Peak memory consumption was 216.3MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,339 INFO L158 Benchmark]: Witness Printer took 55.22ms. Allocated memory is still 469.8MB. Free memory was 327.7MB in the beginning and 324.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-21 12:08:39,340 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 117.4MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.98ms. Allocated memory is still 169.9MB. Free memory was 101.2MB in the beginning and 89.4MB in the end (delta: 11.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.81ms. Allocated memory is still 169.9MB. Free memory was 89.4MB in the beginning and 88.6MB in the end (delta: 816.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 52.84ms. Allocated memory is still 169.9MB. Free memory was 88.4MB in the beginning and 86.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 339.78ms. Allocated memory is still 169.9MB. Free memory was 86.5MB in the beginning and 72.3MB in the end (delta: 14.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 26735.12ms. Allocated memory was 169.9MB in the beginning and 469.8MB in the end (delta: 299.9MB). Free memory was 71.9MB in the beginning and 327.7MB in the end (delta: -255.8MB). Peak memory consumption was 216.3MB. Max. memory is 16.1GB. * Witness Printer took 55.22ms. Allocated memory is still 469.8MB. Free memory was 327.7MB in the beginning and 324.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.7s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 5.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 313 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 262 mSDsluCounter, 3912 SdHoareTripleChecker+Invalid, 2.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3270 mSDsCounter, 326 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2541 IncrementalHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 326 mSolverCounterUnsat, 642 mSDtfsCounter, 2541 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2120 GetRequests, 1884 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=8, InterpolantAutomatonStates: 149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 16 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 14.8s InterpolantComputationTime, 2172 NumberOfCodeBlocks, 2145 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2391 ConstructedInterpolants, 0 QuantifiedInterpolants, 15679 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2175 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 6714/7295 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((((((((0 <= r) && (((__int128) r + 1) <= d)) && (((__int128) d + r) == A)) && (((__int128) r + ((long long) 2 * B)) == ((__int128) A + d))) && (q == 1)) && (A <= 2)) && (p == 1)) || ((((((B == 1) && (r == 0)) && (q == 2)) && (p == 2)) && (A == 2)) && (d == 2))) || (((((((A == r) && (d == ((long long) 2 * B))) && (((__int128) r + 1) <= d)) && (p == 2)) && (q == 0)) && (A <= 2)) && (B <= r))) || ((((((B == 1) && (r == 0)) && (q == 2)) && (A == 2)) && (d == 1)) && (p == 1))) || ((((d == B) && (A == r)) && (q == 0)) && (p == 1))) || (((((((0 <= (r + (((__int128) -1 * d) / 2))) && (((__int128) A + d) == ((__int128) ((long long) B * 4) + r))) && (q == 0)) && (p == 4)) && ((A + (d / 2)) == ((__int128) r + ((long long) 2 * B)))) && (1 <= d)) && (A <= 2))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((d == B) && (A == r)) && (q == 0)) && (1 <= d)) && (A <= 2)) && (p == 1)) || (((((((A == r) && (d == ((long long) 2 * B))) && (p == 2)) && (q == 0)) && (1 <= d)) && (A <= 2)) && (B <= r))) || (((((((0 <= (r + (((__int128) -1 * d) / 2))) && (((__int128) A + d) == ((__int128) ((long long) B * 4) + r))) && (q == 0)) && (p == 4)) && ((A + (d / 2)) == ((__int128) r + ((long long) 2 * B)))) && (1 <= d)) && (A <= 2))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: (cond != 0) RESULT: Ultimate proved your program to be correct! [2024-09-21 12:08:39,408 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE