./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.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 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 16:04:19,874 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 16:04:19,914 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 16:04:19,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 16:04:19,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 16:04:19,941 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 16:04:19,941 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 16:04:19,942 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 16:04:19,942 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 16:04:19,945 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 16:04:19,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 16:04:19,945 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 16:04:19,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 16:04:19,946 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 16:04:19,946 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 16:04:19,946 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 16:04:19,946 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 16:04:19,947 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 16:04:19,947 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 16:04:19,947 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 16:04:19,947 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 16:04:19,947 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 16:04:19,948 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 16:04:19,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 16:04:19,949 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 16:04:19,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 16:04:19,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 16:04:19,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:04:19,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 16:04:19,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 16:04:19,950 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 16:04:19,950 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 16:04:19,950 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 16:04:19,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 16:04:19,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 16:04:19,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 16:04:19,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 16:04:19,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 008f13fd1550f54b25db8c20ee30759d3819e45d65744da9f4f77718b68e7e66 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 16:04:20,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 16:04:20,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 16:04:20,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 16:04:20,170 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 16:04:20,170 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 16:04:20,171 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-09-18 16:04:21,437 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 16:04:21,584 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 16:04:21,584 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_valuebound1.c [2024-09-18 16:04:21,589 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8e4a4babb/9d815b348ffb45edb5906a63e02f9d43/FLAG0812f6f1a [2024-09-18 16:04:22,003 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8e4a4babb/9d815b348ffb45edb5906a63e02f9d43 [2024-09-18 16:04:22,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 16:04:22,006 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 16:04:22,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 16:04:22,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 16:04:22,012 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 16:04:22,013 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,013 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@218fd546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22, skipping insertion in model container [2024-09-18 16:04:22,013 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,032 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 16:04:22,136 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/egcd-ll_valuebound1.c[489,502] [2024-09-18 16:04:22,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:04:22,159 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 16:04:22,167 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/egcd-ll_valuebound1.c[489,502] [2024-09-18 16:04:22,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 16:04:22,185 INFO L204 MainTranslator]: Completed translation [2024-09-18 16:04:22,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22 WrapperNode [2024-09-18 16:04:22,185 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 16:04:22,186 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 16:04:22,186 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 16:04:22,186 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 16:04:22,191 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,196 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,202 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 16:04:22,203 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 16:04:22,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 16:04:22,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 16:04:22,204 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 16:04:22,211 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,212 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,222 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]. [2024-09-18 16:04:22,222 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,222 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,224 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,227 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,228 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,228 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,230 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 16:04:22,230 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 16:04:22,230 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 16:04:22,231 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 16:04:22,231 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (1/1) ... [2024-09-18 16:04:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 16:04:22,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:22,259 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) [2024-09-18 16:04:22,261 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 [2024-09-18 16:04:22,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-18 16:04:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 16:04:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 16:04:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 16:04:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 16:04:22,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 16:04:22,294 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 16:04:22,340 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 16:04:22,341 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 16:04:22,478 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 16:04:22,478 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 16:04:22,496 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 16:04:22,497 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 16:04:22,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:04:22 BoogieIcfgContainer [2024-09-18 16:04:22,497 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 16:04:22,499 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 16:04:22,499 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 16:04:22,502 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 16:04:22,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 04:04:22" (1/3) ... [2024-09-18 16:04:22,503 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8ca107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:04:22, skipping insertion in model container [2024-09-18 16:04:22,503 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 04:04:22" (2/3) ... [2024-09-18 16:04:22,504 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8ca107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 04:04:22, skipping insertion in model container [2024-09-18 16:04:22,504 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:04:22" (3/3) ... [2024-09-18 16:04:22,505 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound1.c [2024-09-18 16:04:22,518 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 16:04:22,519 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 16:04:22,573 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 16:04:22,578 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;@3ba29b01, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 16:04:22,578 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 16:04:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-18 16:04:22,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:04:22,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:22,589 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:22,589 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:22,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash 963610160, now seen corresponding path program 1 times [2024-09-18 16:04:22,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:22,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326317942] [2024-09-18 16:04:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:22,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:22,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,729 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:04:22,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:22,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326317942] [2024-09-18 16:04:22,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326317942] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:22,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:04:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 16:04:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559266903] [2024-09-18 16:04:22,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:22,740 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 16:04:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 16:04:22,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:04:22,770 INFO L87 Difference]: Start difference. First operand has 35 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:04:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:22,800 INFO L93 Difference]: Finished difference Result 64 states and 102 transitions. [2024-09-18 16:04:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 16:04:22,802 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-18 16:04:22,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:22,814 INFO L225 Difference]: With dead ends: 64 [2024-09-18 16:04:22,815 INFO L226 Difference]: Without dead ends: 31 [2024-09-18 16:04:22,817 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 16:04:22,821 INFO L434 NwaCegarLoop]: 43 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, 43 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 [2024-09-18 16:04:22,823 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:22,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-18 16:04:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-18 16:04:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-18 16:04:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2024-09-18 16:04:22,880 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 32 [2024-09-18 16:04:22,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:22,881 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2024-09-18 16:04:22,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-18 16:04:22,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-09-18 16:04:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 16:04:22,883 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:22,883 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:22,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 16:04:22,883 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:22,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:22,884 INFO L85 PathProgramCache]: Analyzing trace with hash -914175556, now seen corresponding path program 1 times [2024-09-18 16:04:22,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:22,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065411111] [2024-09-18 16:04:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:22,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:04:22,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312875516] [2024-09-18 16:04:22,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:22,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:22,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:22,935 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) [2024-09-18 16:04:22,937 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 16:04:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:22,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:04:22,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:04:23,082 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:04:23,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:23,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065411111] [2024-09-18 16:04:23,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:04:23,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312875516] [2024-09-18 16:04:23,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312875516] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:23,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:04:23,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:04:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487316696] [2024-09-18 16:04:23,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:23,088 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:04:23,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:23,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:04:23,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:04:23,088 INFO L87 Difference]: Start difference. First operand 31 states and 41 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:04:23,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:23,153 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2024-09-18 16:04:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:04:23,153 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 32 [2024-09-18 16:04:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:23,154 INFO L225 Difference]: With dead ends: 47 [2024-09-18 16:04:23,154 INFO L226 Difference]: Without dead ends: 45 [2024-09-18 16:04:23,155 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:04:23,155 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:23,156 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 129 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-18 16:04:23,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-18 16:04:23,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 20 states have (on average 1.25) internal successors, (25), 22 states have internal predecessors, (25), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:04:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 61 transitions. [2024-09-18 16:04:23,168 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 61 transitions. Word has length 32 [2024-09-18 16:04:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:23,169 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 61 transitions. [2024-09-18 16:04:23,169 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, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2024-09-18 16:04:23,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 61 transitions. [2024-09-18 16:04:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 16:04:23,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:23,170 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:23,183 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 16:04:23,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:23,373 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:23,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:23,373 INFO L85 PathProgramCache]: Analyzing trace with hash 737940505, now seen corresponding path program 1 times [2024-09-18 16:04:23,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:23,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020341231] [2024-09-18 16:04:23,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:23,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:04:23,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [272742746] [2024-09-18 16:04:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:23,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:23,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:23,395 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) [2024-09-18 16:04:23,397 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 16:04:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:23,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:04:23,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:04:23,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:04:23,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020341231] [2024-09-18 16:04:23,489 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:04:23,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272742746] [2024-09-18 16:04:23,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272742746] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:23,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:04:23,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:04:23,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410157179] [2024-09-18 16:04:23,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:23,490 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:04:23,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:23,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:04:23,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:04:23,491 INFO L87 Difference]: Start difference. First operand 44 states and 61 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) [2024-09-18 16:04:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:23,542 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-18 16:04:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:04:23,542 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 [2024-09-18 16:04:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:23,543 INFO L225 Difference]: With dead ends: 51 [2024-09-18 16:04:23,543 INFO L226 Difference]: Without dead ends: 49 [2024-09-18 16:04:23,544 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 [2024-09-18 16:04:23,544 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:23,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 131 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-18 16:04:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2024-09-18 16:04:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 16:04:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2024-09-18 16:04:23,552 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 37 [2024-09-18 16:04:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:23,553 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2024-09-18 16:04:23,553 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) [2024-09-18 16:04:23,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2024-09-18 16:04:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-18 16:04:23,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:23,554 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:23,567 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 16:04:23,754 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:23,755 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:23,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:23,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1385223068, now seen corresponding path program 1 times [2024-09-18 16:04:23,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:23,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003464547] [2024-09-18 16:04:23,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:23,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 16:04:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708928131] [2024-09-18 16:04:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:23,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:23,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:23,775 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) [2024-09-18 16:04:23,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 16:04:23,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:23,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 16:04:23,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-18 16:04:23,879 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:04:23,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:23,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003464547] [2024-09-18 16:04:23,879 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 16:04:23,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708928131] [2024-09-18 16:04:23,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708928131] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:23,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:04:23,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:04:23,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672184839] [2024-09-18 16:04:23,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:23,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:04:23,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:23,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:04:23,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:04:23,882 INFO L87 Difference]: Start difference. First operand 48 states and 64 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, (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) [2024-09-18 16:04:23,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:23,938 INFO L93 Difference]: Finished difference Result 73 states and 104 transitions. [2024-09-18 16:04:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:04:23,939 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, (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 42 [2024-09-18 16:04:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:23,941 INFO L225 Difference]: With dead ends: 73 [2024-09-18 16:04:23,942 INFO L226 Difference]: Without dead ends: 69 [2024-09-18 16:04:23,942 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:04:23,943 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:23,943 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 130 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-18 16:04:23,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-18 16:04:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 32 states have (on average 1.28125) internal successors, (41), 36 states have internal predecessors, (41), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-18 16:04:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 97 transitions. [2024-09-18 16:04:23,960 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 97 transitions. Word has length 42 [2024-09-18 16:04:23,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:23,961 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 97 transitions. [2024-09-18 16:04:23,961 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, (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) [2024-09-18 16:04:23,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:23,961 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 97 transitions. [2024-09-18 16:04:23,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 16:04:23,962 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:23,962 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:23,976 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 16:04:24,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:24,167 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:24,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:24,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1071635405, now seen corresponding path program 1 times [2024-09-18 16:04:24,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:24,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757788733] [2024-09-18 16:04:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:24,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:24,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:24,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:04:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:04:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:04:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 16:04:24,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757788733] [2024-09-18 16:04:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757788733] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 16:04:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 16:04:24,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178445156] [2024-09-18 16:04:24,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:24,359 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:04:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:04:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 16:04:24,360 INFO L87 Difference]: Start difference. First operand 69 states and 97 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-18 16:04:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:24,399 INFO L93 Difference]: Finished difference Result 75 states and 102 transitions. [2024-09-18 16:04:24,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:04:24,400 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 48 [2024-09-18 16:04:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:24,401 INFO L225 Difference]: With dead ends: 75 [2024-09-18 16:04:24,403 INFO L226 Difference]: Without dead ends: 73 [2024-09-18 16:04:24,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 16:04:24,404 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:24,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 140 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:24,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-18 16:04:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2024-09-18 16:04:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 39 states have internal predecessors, (44), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-18 16:04:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 100 transitions. [2024-09-18 16:04:24,418 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 100 transitions. Word has length 48 [2024-09-18 16:04:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:24,418 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 100 transitions. [2024-09-18 16:04:24,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2024-09-18 16:04:24,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 100 transitions. [2024-09-18 16:04:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-18 16:04:24,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:24,420 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:24,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-18 16:04:24,420 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:24,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:24,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1501538128, now seen corresponding path program 1 times [2024-09-18 16:04:24,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:24,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556126953] [2024-09-18 16:04:24,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:24,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:24,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:04:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:04:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:04:24,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,595 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-18 16:04:24,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:24,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556126953] [2024-09-18 16:04:24,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556126953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:04:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114952438] [2024-09-18 16:04:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:24,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:24,599 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) [2024-09-18 16:04:24,601 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 16:04:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:24,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:04:24,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-18 16:04:24,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:04:24,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114952438] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:24,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:04:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2024-09-18 16:04:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735087002] [2024-09-18 16:04:24,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:24,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 16:04:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 16:04:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-18 16:04:24,720 INFO L87 Difference]: Start difference. First operand 73 states and 100 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 16:04:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:24,766 INFO L93 Difference]: Finished difference Result 83 states and 108 transitions. [2024-09-18 16:04:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 16:04:24,767 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2024-09-18 16:04:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:24,768 INFO L225 Difference]: With dead ends: 83 [2024-09-18 16:04:24,770 INFO L226 Difference]: Without dead ends: 80 [2024-09-18 16:04:24,770 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:04:24,771 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 4 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:24,771 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 132 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-18 16:04:24,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2024-09-18 16:04:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 44 states have internal predecessors, (50), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-18 16:04:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-18 16:04:24,785 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 50 [2024-09-18 16:04:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:24,786 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-18 16:04:24,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-18 16:04:24,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-18 16:04:24,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-18 16:04:24,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:24,789 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:24,801 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 16:04:24,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:24,990 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:24,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:24,990 INFO L85 PathProgramCache]: Analyzing trace with hash 789508930, now seen corresponding path program 1 times [2024-09-18 16:04:24,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:24,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878071077] [2024-09-18 16:04:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:24,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:25,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:04:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:04:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:04:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-18 16:04:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-18 16:04:25,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878071077] [2024-09-18 16:04:25,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878071077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:04:25,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926110634] [2024-09-18 16:04:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:25,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:25,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:25,262 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) [2024-09-18 16:04:25,263 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 16:04:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-18 16:04:25,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-18 16:04:25,375 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 16:04:25,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926110634] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 16:04:25,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 16:04:25,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-18 16:04:25,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345111834] [2024-09-18 16:04:25,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 16:04:25,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-18 16:04:25,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:25,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-18 16:04:25,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-18 16:04:25,376 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 16:04:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:25,441 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2024-09-18 16:04:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 16:04:25,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 53 [2024-09-18 16:04:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:25,444 INFO L225 Difference]: With dead ends: 91 [2024-09-18 16:04:25,444 INFO L226 Difference]: Without dead ends: 87 [2024-09-18 16:04:25,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-09-18 16:04:25,445 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:25,446 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 157 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-18 16:04:25,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2024-09-18 16:04:25,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 50 states have internal predecessors, (55), 27 states have call successors, (27), 12 states have call predecessors, (27), 11 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-18 16:04:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2024-09-18 16:04:25,462 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 53 [2024-09-18 16:04:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:25,463 INFO L474 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2024-09-18 16:04:25,463 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-18 16:04:25,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2024-09-18 16:04:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-18 16:04:25,464 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:25,464 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:25,478 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-18 16:04:25,668 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-18 16:04:25,669 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:25,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1427018501, now seen corresponding path program 2 times [2024-09-18 16:04:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231857571] [2024-09-18 16:04:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:25,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:25,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:04:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:04:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:04:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 16:04:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 16:04:25,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:25,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231857571] [2024-09-18 16:04:25,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231857571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:04:25,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41699441] [2024-09-18 16:04:25,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 16:04:25,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:25,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:25,842 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) [2024-09-18 16:04:25,843 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 16:04:25,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 16:04:25,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 16:04:25,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 16:04:25,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-18 16:04:25,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:04:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-18 16:04:26,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41699441] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:04:26,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:04:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-18 16:04:26,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678267129] [2024-09-18 16:04:26,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:04:26,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 16:04:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 16:04:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-18 16:04:26,074 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-18 16:04:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:26,181 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2024-09-18 16:04:26,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:04:26,181 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) Word has length 55 [2024-09-18 16:04:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:26,182 INFO L225 Difference]: With dead ends: 110 [2024-09-18 16:04:26,182 INFO L226 Difference]: Without dead ends: 74 [2024-09-18 16:04:26,183 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2024-09-18 16:04:26,183 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 36 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:26,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 200 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 16:04:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-18 16:04:26,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-09-18 16:04:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 43 states have internal predecessors, (46), 22 states have call successors, (22), 11 states have call predecessors, (22), 10 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-18 16:04:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 88 transitions. [2024-09-18 16:04:26,191 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 88 transitions. Word has length 55 [2024-09-18 16:04:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:26,192 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 88 transitions. [2024-09-18 16:04:26,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 11 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-18 16:04:26,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 88 transitions. [2024-09-18 16:04:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-18 16:04:26,192 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 16:04:26,193 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:26,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 16:04:26,396 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:26,397 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 16:04:26,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:26,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1563984878, now seen corresponding path program 1 times [2024-09-18 16:04:26,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 16:04:26,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281048688] [2024-09-18 16:04:26,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:26,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 16:04:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 16:04:26,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-18 16:04:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 16:04:26,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 16:04:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-18 16:04:26,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 16:04:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 16:04:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-18 16:04:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-18 16:04:26,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-18 16:04:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,527 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:04:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 16:04:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281048688] [2024-09-18 16:04:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281048688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 16:04:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706233042] [2024-09-18 16:04:26,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 16:04:26,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:26,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 16:04:26,529 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) [2024-09-18 16:04:26,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 16:04:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 16:04:26,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 16:04:26,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 16:04:26,654 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-18 16:04:26,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 16:04:26,744 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-18 16:04:26,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706233042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 16:04:26,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 16:04:26,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-18 16:04:26,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747413658] [2024-09-18 16:04:26,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 16:04:26,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-18 16:04:26,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 16:04:26,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-18 16:04:26,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-18 16:04:26,746 INFO L87 Difference]: Start difference. First operand 74 states and 88 transitions. Second operand has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-18 16:04:26,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 16:04:26,813 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2024-09-18 16:04:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 16:04:26,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 60 [2024-09-18 16:04:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 16:04:26,813 INFO L225 Difference]: With dead ends: 78 [2024-09-18 16:04:26,813 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 16:04:26,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-09-18 16:04:26,814 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 16:04:26,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 145 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 16:04:26,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 16:04:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 16:04:26,815 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) [2024-09-18 16:04:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 16:04:26,815 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 60 [2024-09-18 16:04:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 16:04:26,815 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 16:04:26,815 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 9 states have internal predecessors, (28), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-18 16:04:26,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 16:04:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 16:04:26,816 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 16:04:26,817 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 16:04:26,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 16:04:27,018 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 16:04:27,021 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 16:04:27,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 16:04:27,266 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 16:04:27,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 04:04:27 BoogieIcfgContainer [2024-09-18 16:04:27,276 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 16:04:27,277 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 16:04:27,277 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 16:04:27,277 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 16:04:27,277 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 04:04:22" (3/4) ... [2024-09-18 16:04:27,278 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 16:04:27,315 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 16:04:27,315 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 16:04:27,315 INFO L158 Benchmark]: Toolchain (without parser) took 5309.40ms. Allocated memory was 157.3MB in the beginning and 190.8MB in the end (delta: 33.6MB). Free memory was 89.0MB in the beginning and 98.9MB in the end (delta: -9.9MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,315 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:04:27,315 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.40ms. Allocated memory is still 157.3MB. Free memory was 88.8MB in the beginning and 76.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,315 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.00ms. Allocated memory is still 157.3MB. Free memory was 76.7MB in the beginning and 75.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 16:04:27,316 INFO L158 Benchmark]: Boogie Preprocessor took 26.45ms. Allocated memory is still 157.3MB. Free memory was 75.5MB in the beginning and 73.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,316 INFO L158 Benchmark]: RCFGBuilder took 266.82ms. Allocated memory is still 157.3MB. Free memory was 73.9MB in the beginning and 127.8MB in the end (delta: -53.9MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,316 INFO L158 Benchmark]: TraceAbstraction took 4777.79ms. Allocated memory was 157.3MB in the beginning and 190.8MB in the end (delta: 33.6MB). Free memory was 127.0MB in the beginning and 102.0MB in the end (delta: 25.0MB). Peak memory consumption was 59.0MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,316 INFO L158 Benchmark]: Witness Printer took 37.97ms. Allocated memory is still 190.8MB. Free memory was 102.0MB in the beginning and 98.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 16:04:27,317 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 113.2MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.40ms. Allocated memory is still 157.3MB. Free memory was 88.8MB in the beginning and 76.7MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 17.00ms. Allocated memory is still 157.3MB. Free memory was 76.7MB in the beginning and 75.5MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.45ms. Allocated memory is still 157.3MB. Free memory was 75.5MB in the beginning and 73.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.82ms. Allocated memory is still 157.3MB. Free memory was 73.9MB in the beginning and 127.8MB in the end (delta: -53.9MB). Peak memory consumption was 17.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4777.79ms. Allocated memory was 157.3MB in the beginning and 190.8MB in the end (delta: 33.6MB). Free memory was 127.0MB in the beginning and 102.0MB in the end (delta: 25.0MB). Peak memory consumption was 59.0MB. Max. memory is 16.1GB. * Witness Printer took 37.97ms. Allocated memory is still 190.8MB. Free memory was 102.0MB in the beginning and 98.9MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. 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: 13]: 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, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 4.5s, OverallIterations: 9, TraceHistogramMax: 6, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 92 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 1207 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 896 mSDsCounter, 55 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 389 IncrementalHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 55 mSolverCounterUnsat, 311 mSDtfsCounter, 389 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 522 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86occurred in iteration=7, InterpolantAutomatonStates: 49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 738 NumberOfCodeBlocks, 738 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 727 ConstructedInterpolants, 0 QuantifiedInterpolants, 1528 SizeOfPredicates, 13 NumberOfNonLiveVariables, 830 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 15 InterpolantComputations, 7 PerfectInterpolantSequences, 710/759 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: 35]: Loop Invariant Derived loop invariant: ((((((((r == 0) && (y == 1)) && (s == 1)) && (x == 1)) && (b == y)) && (q == 0)) && (a == x)) && (p == 1)) - ProcedureContractResult [Line: 7]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 10]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= \old(cond)) Ensures: (1 <= \old(cond)) RESULT: Ultimate proved your program to be correct! [2024-09-18 16:04:27,336 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE