./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i -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 cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:26:18,225 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:26:18,271 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:26:18,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:26:18,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:26:18,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:26:18,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:26:18,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:26:18,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:26:18,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:26:18,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:26:18,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:26:18,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:26:18,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:26:18,314 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:26:18,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:26:18,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:26:18,315 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:26:18,315 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:26:18,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:26:18,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:26:18,316 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:26:18,316 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:26:18,316 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:26:18,317 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:26:18,317 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:26:18,317 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:26:18,317 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:26:18,318 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:26:18,318 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:26:18,318 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:26:18,318 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:26:18,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:26:18,319 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:26:18,319 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:26:18,320 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:26:18,320 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:26:18,320 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:26:18,321 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:26:18,321 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:26:18,321 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:26:18,322 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:26:18,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc20d196113d3ae541f6b6d9413b3adf505f83f475b90cd277ec788090ea4b3d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:26:18,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:26:18,609 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:26:18,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:26:18,613 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:26:18,613 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:26:18,614 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-09-24 23:26:19,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:26:20,116 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:26:20,117 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound20.i [2024-09-24 23:26:20,126 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/295c889e2/d6087fae268543a581d8a2ae91eb4797/FLAG42e14e5ea [2024-09-24 23:26:20,499 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/295c889e2/d6087fae268543a581d8a2ae91eb4797 [2024-09-24 23:26:20,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:26:20,502 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:26:20,503 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:26:20,504 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:26:20,511 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:26:20,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,512 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394fe1fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20, skipping insertion in model container [2024-09-24 23:26:20,515 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:26:20,715 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/divbin2_unwindbound20.i[951,964] [2024-09-24 23:26:20,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:26:20,751 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:26:20,763 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/divbin2_unwindbound20.i[951,964] [2024-09-24 23:26:20,770 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:26:20,787 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:26:20,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20 WrapperNode [2024-09-24 23:26:20,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:26:20,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:26:20,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:26:20,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:26:20,796 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,802 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,808 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:26:20,809 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:26:20,810 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:26:20,810 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:26:20,810 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:26:20,819 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,819 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,820 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,834 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 23:26:20,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,841 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,845 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,846 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:26:20,853 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:26:20,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:26:20,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:26:20,854 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (1/1) ... [2024-09-24 23:26:20,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:26:20,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:20,888 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 23:26:20,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 23:26:20,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:26:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:26:20,938 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:26:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:26:20,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:26:20,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:26:20,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:26:20,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:26:20,940 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:26:20,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:26:21,004 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:26:21,006 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:26:21,160 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-24 23:26:21,160 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:26:21,194 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:26:21,195 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:26:21,195 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:26:21 BoogieIcfgContainer [2024-09-24 23:26:21,195 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:26:21,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:26:21,199 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:26:21,202 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:26:21,202 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:26:20" (1/3) ... [2024-09-24 23:26:21,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baca366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:26:21, skipping insertion in model container [2024-09-24 23:26:21,203 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:26:20" (2/3) ... [2024-09-24 23:26:21,203 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6baca366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:26:21, skipping insertion in model container [2024-09-24 23:26:21,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:26:21" (3/3) ... [2024-09-24 23:26:21,214 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound20.i [2024-09-24 23:26:21,245 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:26:21,246 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:26:21,301 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:26:21,307 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;@53068a6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:26:21,308 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:26:21,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 23:26:21,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-24 23:26:21,322 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:21,322 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:21,323 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:21,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1996614108, now seen corresponding path program 1 times [2024-09-24 23:26:21,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:21,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935533986] [2024-09-24 23:26:21,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:21,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:21,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935533986] [2024-09-24 23:26:21,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935533986] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:21,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:21,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:26:21,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942252751] [2024-09-24 23:26:21,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:21,531 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:26:21,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:21,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:26:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:26:21,550 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:21,606 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-09-24 23:26:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:26:21,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-24 23:26:21,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:21,615 INFO L225 Difference]: With dead ends: 41 [2024-09-24 23:26:21,615 INFO L226 Difference]: Without dead ends: 21 [2024-09-24 23:26:21,618 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:26:21,621 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:21,621 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-24 23:26:21,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-24 23:26:21,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-24 23:26:21,653 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-09-24 23:26:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:21,655 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-24 23:26:21,655 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:21,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:21,657 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-24 23:26:21,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-24 23:26:21,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:21,658 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:21,658 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:26:21,658 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:21,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:21,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1251497910, now seen corresponding path program 1 times [2024-09-24 23:26:21,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:21,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390457121] [2024-09-24 23:26:21,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:21,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:21,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:21,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:21,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:21,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:21,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:21,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390457121] [2024-09-24 23:26:21,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390457121] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:21,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:21,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:26:21,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114542914] [2024-09-24 23:26:21,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:21,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:26:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:21,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:26:21,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:21,820 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:21,898 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-24 23:26:21,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:26:21,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-24 23:26:21,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:21,900 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:26:21,900 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:26:21,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:26:21,901 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:21,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:26:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:26:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-24 23:26:21,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:21,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-24 23:26:21,911 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2024-09-24 23:26:21,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:21,911 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-24 23:26:21,911 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:21,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:21,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-24 23:26:21,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:26:21,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:21,913 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:21,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:26:21,913 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:21,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:21,914 INFO L85 PathProgramCache]: Analyzing trace with hash -239317110, now seen corresponding path program 1 times [2024-09-24 23:26:21,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:21,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587029655] [2024-09-24 23:26:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:21,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:21,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:26:21,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90938810] [2024-09-24 23:26:21,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:21,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:21,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:21,938 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:26:21,939 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:26:21,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:21,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:26:21,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:22,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:22,104 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:26:22,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:22,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587029655] [2024-09-24 23:26:22,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:26:22,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90938810] [2024-09-24 23:26:22,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90938810] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:22,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:22,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:26:22,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864903716] [2024-09-24 23:26:22,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:22,110 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:26:22,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:22,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:26:22,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:22,111 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:22,170 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-09-24 23:26:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:26:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-24 23:26:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:22,173 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:26:22,173 INFO L226 Difference]: Without dead ends: 31 [2024-09-24 23:26:22,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:26:22,175 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:22,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:22,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-24 23:26:22,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-24 23:26:22,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:22,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-24 23:26:22,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-09-24 23:26:22,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:22,184 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-24 23:26:22,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:26:22,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:22,184 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-24 23:26:22,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-24 23:26:22,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:22,185 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:22,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:26:22,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:22,387 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash 726925940, now seen corresponding path program 1 times [2024-09-24 23:26:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:22,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849720226] [2024-09-24 23:26:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:22,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-24 23:26:22,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:22,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849720226] [2024-09-24 23:26:22,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849720226] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:26:22,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:26:22,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:26:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219763343] [2024-09-24 23:26:22,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:26:22,665 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:26:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:26:22,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:26:22,667 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:22,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:22,731 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-09-24 23:26:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:26:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-24 23:26:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:22,732 INFO L225 Difference]: With dead ends: 57 [2024-09-24 23:26:22,734 INFO L226 Difference]: Without dead ends: 32 [2024-09-24 23:26:22,735 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:26:22,736 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:22,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:26:22,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-24 23:26:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-24 23:26:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:22,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-09-24 23:26:22,749 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2024-09-24 23:26:22,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:22,749 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-09-24 23:26:22,750 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:26:22,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-09-24 23:26:22,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:26:22,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:22,751 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:22,752 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 23:26:22,752 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:22,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:22,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1153424271, now seen corresponding path program 1 times [2024-09-24 23:26:22,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:22,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528367825] [2024-09-24 23:26:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:22,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:26:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-24 23:26:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:26:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:26:22,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528367825] [2024-09-24 23:26:22,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528367825] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:26:22,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589641399] [2024-09-24 23:26:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:22,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:22,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:22,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:26:22,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:26:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:22,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:26:22,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:23,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:26:23,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:26:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:26:23,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589641399] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:26:23,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:26:23,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-24 23:26:23,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123997823] [2024-09-24 23:26:23,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:26:23,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:26:23,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:26:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:26:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:26:23,098 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:26:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:26:23,227 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-24 23:26:23,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:26:23,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-24 23:26:23,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:26:23,230 INFO L225 Difference]: With dead ends: 72 [2024-09-24 23:26:23,230 INFO L226 Difference]: Without dead ends: 51 [2024-09-24 23:26:23,230 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:26:23,231 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:26:23,231 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:26:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-24 23:26:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-24 23:26:23,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:26:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-24 23:26:23,248 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2024-09-24 23:26:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:26:23,249 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-24 23:26:23,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-24 23:26:23,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:23,250 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-24 23:26:23,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:26:23,251 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:26:23,251 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:26:23,268 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-24 23:26:23,451 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:23,452 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:26:23,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:26:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504499, now seen corresponding path program 1 times [2024-09-24 23:26:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:26:23,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383290261] [2024-09-24 23:26:23,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:23,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:26:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:26:23,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [921797127] [2024-09-24 23:26:23,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:26:23,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:26:23,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:26:23,492 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:26:23,496 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:26:23,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:26:23,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:26:23,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:26:23,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:26:23,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:26:36,324 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 12 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:26:56,398 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:27:00,410 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ 1 (mod c_main_~r~0 4294967296))))) is different from true [2024-09-24 23:27:24,505 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:27:48,563 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:27:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-09-24 23:27:48,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:27:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383290261] [2024-09-24 23:27:48,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:27:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921797127] [2024-09-24 23:27:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921797127] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:27:48,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:27:48,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2024-09-24 23:27:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117582042] [2024-09-24 23:27:48,574 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:27:48,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:27:48,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:27:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:27:48,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=186, Unknown=1, NotChecked=28, Total=272 [2024-09-24 23:27:48,576 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:27:53,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:27:57,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:28:01,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:28:05,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-24 23:28:06,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:28:06,883 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-09-24 23:28:06,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:28:06,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-09-24 23:28:06,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:28:06,886 INFO L225 Difference]: With dead ends: 85 [2024-09-24 23:28:06,886 INFO L226 Difference]: Without dead ends: 80 [2024-09-24 23:28:06,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342 [2024-09-24 23:28:06,887 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 17.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:28:06,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 239 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 207 Invalid, 4 Unknown, 81 Unchecked, 17.7s Time] [2024-09-24 23:28:06,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-24 23:28:06,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-24 23:28:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-24 23:28:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-24 23:28:06,920 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 26 [2024-09-24 23:28:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:28:06,921 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-24 23:28:06,921 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:28:06,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-24 23:28:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:28:06,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:28:06,925 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:28:06,935 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-24 23:28:07,126 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:28:07,126 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:28:07,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1306939949, now seen corresponding path program 2 times [2024-09-24 23:28:07,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:28:07,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839765457] [2024-09-24 23:28:07,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:28:07,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:28:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:28:07,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273894086] [2024-09-24 23:28:07,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:28:07,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:28:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:28:07,177 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:28:07,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:28:07,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:28:07,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:28:07,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:28:07,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:28:07,696 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:28:07,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:28:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:28:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839765457] [2024-09-24 23:28:24,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:28:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273894086] [2024-09-24 23:28:24,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273894086] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:28:24,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:28:24,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-24 23:28:24,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678244822] [2024-09-24 23:28:24,993 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-24 23:28:24,993 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:28:24,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:28:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:28:24,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=181, Unknown=4, NotChecked=0, Total=240 [2024-09-24 23:28:24,995 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:28:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:28:25,244 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-09-24 23:28:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:28:25,245 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-09-24 23:28:25,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:28:25,248 INFO L225 Difference]: With dead ends: 123 [2024-09-24 23:28:25,248 INFO L226 Difference]: Without dead ends: 120 [2024-09-24 23:28:25,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=61, Invalid=207, Unknown=4, NotChecked=0, Total=272 [2024-09-24 23:28:25,249 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:28:25,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:28:25,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-24 23:28:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2024-09-24 23:28:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-24 23:28:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-09-24 23:28:25,285 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 32 [2024-09-24 23:28:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:28:25,285 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-09-24 23:28:25,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 23:28:25,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-09-24 23:28:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:28:25,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:28:25,288 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:28:25,297 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:28:25,491 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:28:25,491 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:28:25,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:28:25,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2037540399, now seen corresponding path program 3 times [2024-09-24 23:28:25,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:28:25,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121950443] [2024-09-24 23:28:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:28:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:28:25,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:25,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:28:26,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:26,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-24 23:28:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:26,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-24 23:28:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:28:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:28:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:28:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121950443] [2024-09-24 23:28:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121950443] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:28:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5188481] [2024-09-24 23:28:26,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:28:26,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:28:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:28:26,049 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:28:26,050 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process