./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/bresenham-ll.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 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/bresenham-ll.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 68505a1040934ea3cdccf61a3fb1a3debf8c6c64330c175637d96b2737c92d5f --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:37:40,237 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:37:40,300 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:37:40,309 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:37:40,311 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:37:40,335 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:37:40,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:37:40,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:37:40,339 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:37:40,339 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:37:40,340 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:37:40,340 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:37:40,340 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:37:40,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:37:40,343 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:37:40,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:37:40,344 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:37:40,344 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:37:40,344 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:37:40,344 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:37:40,345 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:37:40,345 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:37:40,345 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:37:40,345 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:37:40,346 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:37:40,346 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:37:40,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:37:40,349 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:37:40,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:37:40,349 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:37:40,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:37:40,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:37:40,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:37:40,350 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:37:40,350 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:37:40,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:37:40,351 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 -> 68505a1040934ea3cdccf61a3fb1a3debf8c6c64330c175637d96b2737c92d5f 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.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true 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 [2024-09-25 10:37:40,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:37:40,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:37:40,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:37:40,619 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:37:40,620 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:37:40,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/bresenham-ll.c [2024-09-25 10:37:41,981 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:37:42,145 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:37:42,149 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/bresenham-ll.c [2024-09-25 10:37:42,158 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/03fe50ca6/03a97674fd134b99a9816b1a71386eb8/FLAG6ac25bd2f [2024-09-25 10:37:42,563 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/03fe50ca6/03a97674fd134b99a9816b1a71386eb8 [2024-09-25 10:37:42,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:37:42,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:37:42,567 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:37:42,568 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:37:42,572 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:37:42,573 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,573 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e26f0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42, skipping insertion in model container [2024-09-25 10:37:42,574 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,590 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:37:42,722 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/bresenham-ll.c[597,610] [2024-09-25 10:37:42,741 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:37:42,751 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:37:42,761 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/bresenham-ll.c[597,610] [2024-09-25 10:37:42,769 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:37:42,783 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:37:42,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42 WrapperNode [2024-09-25 10:37:42,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:37:42,785 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:37:42,785 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:37:42,785 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:37:42,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,796 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,802 INFO L138 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:37:42,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:37:42,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:37:42,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:37:42,804 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:37:42,812 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,817 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,832 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]. [2024-09-25 10:37:42,836 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,837 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,839 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,843 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,847 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,849 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:37:42,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:37:42,851 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:37:42,851 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:37:42,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (1/1) ... [2024-09-25 10:37:42,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:37:42,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:42,882 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) [2024-09-25 10:37:42,889 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 [2024-09-25 10:37:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:37:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:37:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:37:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:37:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:37:42,933 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:37:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:37:42,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:37:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:37:42,935 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:37:43,002 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:37:43,003 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:37:43,125 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 10:37:43,126 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:37:43,141 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:37:43,142 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-25 10:37:43,142 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:37:43 BoogieIcfgContainer [2024-09-25 10:37:43,142 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:37:43,143 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:37:43,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:37:43,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:37:43,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:37:42" (1/3) ... [2024-09-25 10:37:43,147 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230bfde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:37:43, skipping insertion in model container [2024-09-25 10:37:43,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:37:42" (2/3) ... [2024-09-25 10:37:43,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230bfde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:37:43, skipping insertion in model container [2024-09-25 10:37:43,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:37:43" (3/3) ... [2024-09-25 10:37:43,149 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll.c [2024-09-25 10:37:43,164 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:37:43,164 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:37:43,203 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:37:43,210 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;@4d0655d7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:37:43,210 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:37:43,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 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), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:37:43,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-25 10:37:43,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:43,220 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:43,220 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:43,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:43,225 INFO L85 PathProgramCache]: Analyzing trace with hash -949120890, now seen corresponding path program 1 times [2024-09-25 10:37:43,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:43,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151131874] [2024-09-25 10:37:43,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:43,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:37:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646143224] [2024-09-25 10:37:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:43,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:43,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:43,327 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) [2024-09-25 10:37:43,333 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:37:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:43,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:37:43,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:43,531 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:37:43,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151131874] [2024-09-25 10:37:43,532 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:37:43,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646143224] [2024-09-25 10:37:43,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646143224] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:37:43,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:37:43,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 10:37:43,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599595854] [2024-09-25 10:37:43,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:37:43,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:37:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:37:43,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:37:43,556 INFO L87 Difference]: Start difference. First operand has 22 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), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2024-09-25 10:37:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:43,655 INFO L93 Difference]: Finished difference Result 51 states and 71 transitions. [2024-09-25 10:37:43,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:37:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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 10 [2024-09-25 10:37:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:43,667 INFO L225 Difference]: With dead ends: 51 [2024-09-25 10:37:43,670 INFO L226 Difference]: Without dead ends: 28 [2024-09-25 10:37:43,673 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:37:43,676 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:43,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 61 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:37:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-25 10:37:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2024-09-25 10:37:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.2) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:37:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2024-09-25 10:37:43,706 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2024-09-25 10:37:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:43,707 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2024-09-25 10:37:43,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2024-09-25 10:37:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2024-09-25 10:37:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:37:43,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:43,709 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:43,721 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 10:37:43,912 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-09-25 10:37:43,912 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:43,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:43,917 INFO L85 PathProgramCache]: Analyzing trace with hash 338429259, now seen corresponding path program 1 times [2024-09-25 10:37:43,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:43,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147462043] [2024-09-25 10:37:43,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:43,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:37:43,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3921219] [2024-09-25 10:37:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:43,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:43,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:43,956 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) [2024-09-25 10:37:43,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:37:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:44,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-25 10:37:44,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:44,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:37:44,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:44,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147462043] [2024-09-25 10:37:44,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:37:44,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3921219] [2024-09-25 10:37:44,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3921219] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:37:44,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:37:44,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-25 10:37:44,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962368624] [2024-09-25 10:37:44,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:37:44,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:37:44,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:44,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:37:44,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:37:44,137 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:37:44,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:44,218 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2024-09-25 10:37:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:37:44,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 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 17 [2024-09-25 10:37:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:44,220 INFO L225 Difference]: With dead ends: 34 [2024-09-25 10:37:44,220 INFO L226 Difference]: Without dead ends: 26 [2024-09-25 10:37:44,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:37:44,222 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:44,224 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 47 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:37:44,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-25 10:37:44,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-25 10:37:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 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) [2024-09-25 10:37:44,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-25 10:37:44,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2024-09-25 10:37:44,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:44,231 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-25 10:37:44,231 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:37:44,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-25 10:37:44,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-25 10:37:44,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:44,233 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:44,246 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:37:44,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:44,437 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:44,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1241206890, now seen corresponding path program 1 times [2024-09-25 10:37:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:44,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051915501] [2024-09-25 10:37:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:44,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:37:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764850791] [2024-09-25 10:37:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:44,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:44,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:44,462 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) [2024-09-25 10:37:44,464 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:37:44,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:44,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-25 10:37:44,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:37:44,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:37:44,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051915501] [2024-09-25 10:37:44,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:37:44,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764850791] [2024-09-25 10:37:44,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764850791] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:44,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:37:44,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2024-09-25 10:37:44,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070671274] [2024-09-25 10:37:44,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:44,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:37:44,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:37:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-09-25 10:37:44,709 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:37:44,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:44,963 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2024-09-25 10:37:44,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-25 10:37:44,963 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2024-09-25 10:37:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:44,964 INFO L225 Difference]: With dead ends: 39 [2024-09-25 10:37:44,964 INFO L226 Difference]: Without dead ends: 35 [2024-09-25 10:37:44,965 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:37:44,965 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:44,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 99 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:37:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-25 10:37:44,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2024-09-25 10:37:44,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:37:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-25 10:37:44,975 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2024-09-25 10:37:44,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:44,976 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-25 10:37:44,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.111111111111111) internal successors, (19), 10 states have internal predecessors, (19), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-25 10:37:44,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:44,976 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-25 10:37:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-25 10:37:44,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:44,977 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:44,990 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:37:45,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-09-25 10:37:45,182 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:45,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:45,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1607019461, now seen corresponding path program 1 times [2024-09-25 10:37:45,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:45,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647113492] [2024-09-25 10:37:45,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:45,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:37:45,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1672974922] [2024-09-25 10:37:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:45,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:45,204 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) [2024-09-25 10:37:45,205 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:37:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:45,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-25 10:37:45,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:45,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 10:37:45,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-25 10:37:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647113492] [2024-09-25 10:37:45,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:37:45,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672974922] [2024-09-25 10:37:45,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672974922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:45,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:37:45,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2024-09-25 10:37:45,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482344727] [2024-09-25 10:37:45,589 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:45,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:37:45,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:45,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:37:45,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:37:45,590 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 14 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:37:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:45,737 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2024-09-25 10:37:45,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:37:45,737 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 26 [2024-09-25 10:37:45,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:45,739 INFO L225 Difference]: With dead ends: 38 [2024-09-25 10:37:45,739 INFO L226 Difference]: Without dead ends: 32 [2024-09-25 10:37:45,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:37:45,740 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:45,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 60 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:37:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-25 10:37:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-09-25 10:37:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:37:45,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-25 10:37:45,759 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2024-09-25 10:37:45,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:45,760 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-25 10:37:45,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-25 10:37:45,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:45,761 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-25 10:37:45,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-25 10:37:45,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:45,764 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:45,779 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:37:45,964 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:45,965 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:45,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1676830585, now seen corresponding path program 1 times [2024-09-25 10:37:45,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:45,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508374774] [2024-09-25 10:37:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:45,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:37:45,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222050965] [2024-09-25 10:37:45,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:45,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:45,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:45,988 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) [2024-09-25 10:37:45,989 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:37:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:46,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-25 10:37:46,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:37:46,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:47,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-25 10:37:47,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:47,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508374774] [2024-09-25 10:37:47,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:37:47,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222050965] [2024-09-25 10:37:47,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222050965] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:47,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:37:47,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2024-09-25 10:37:47,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67663060] [2024-09-25 10:37:47,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:47,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-25 10:37:47,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:47,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-25 10:37:47,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-09-25 10:37:47,480 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:37:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:49,188 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2024-09-25 10:37:49,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:37:49,188 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 26 [2024-09-25 10:37:49,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:49,189 INFO L225 Difference]: With dead ends: 55 [2024-09-25 10:37:49,189 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 10:37:49,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2024-09-25 10:37:49,193 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:49,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 91 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:37:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 10:37:49,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2024-09-25 10:37:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-25 10:37:49,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2024-09-25 10:37:49,216 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 26 [2024-09-25 10:37:49,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:49,217 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2024-09-25 10:37:49,217 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 7 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-25 10:37:49,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2024-09-25 10:37:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-25 10:37:49,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:49,219 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:49,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 10:37:49,419 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:49,420 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:49,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:49,420 INFO L85 PathProgramCache]: Analyzing trace with hash -519477623, now seen corresponding path program 1 times [2024-09-25 10:37:49,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:49,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134287189] [2024-09-25 10:37:49,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:49,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:37:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 10:37:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:37:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:37:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:37:49,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:49,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134287189] [2024-09-25 10:37:49,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134287189] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:37:49,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168039272] [2024-09-25 10:37:49,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:49,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:49,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:49,641 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) [2024-09-25 10:37:49,642 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:37:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:49,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-25 10:37:49,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:37:49,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:49,910 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 10:37:49,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168039272] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:49,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:37:49,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-25 10:37:49,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931236045] [2024-09-25 10:37:49,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:49,911 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:37:49,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:49,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:37:49,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:37:49,914 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:37:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:50,056 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2024-09-25 10:37:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-25 10:37:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 35 [2024-09-25 10:37:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:50,057 INFO L225 Difference]: With dead ends: 62 [2024-09-25 10:37:50,057 INFO L226 Difference]: Without dead ends: 56 [2024-09-25 10:37:50,058 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:37:50,058 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:50,058 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 103 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:37:50,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-25 10:37:50,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2024-09-25 10:37:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 34 states have internal predecessors, (40), 9 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-25 10:37:50,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2024-09-25 10:37:50,087 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 35 [2024-09-25 10:37:50,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:50,088 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2024-09-25 10:37:50,088 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 15 states have internal predecessors, (38), 10 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:37:50,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:50,088 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2024-09-25 10:37:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 10:37:50,090 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:50,090 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:50,105 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-25 10:37:50,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:50,291 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:50,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 687364473, now seen corresponding path program 2 times [2024-09-25 10:37:50,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:50,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660155155] [2024-09-25 10:37:50,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:50,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:50,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:37:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 10:37:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:37:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:37:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:37:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:37:50,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660155155] [2024-09-25 10:37:50,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660155155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:37:50,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471621079] [2024-09-25 10:37:50,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:37:50,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:50,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:50,442 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) [2024-09-25 10:37:50,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:37:50,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:37:50,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:37:50,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:37:50,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:50,621 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:37:50,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:37:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:37:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471621079] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:37:50,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:37:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-09-25 10:37:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859932000] [2024-09-25 10:37:50,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:37:50,775 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:37:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:37:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:37:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:37:50,776 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:37:51,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:37:51,136 INFO L93 Difference]: Finished difference Result 81 states and 102 transitions. [2024-09-25 10:37:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-25 10:37:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 44 [2024-09-25 10:37:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:37:51,138 INFO L225 Difference]: With dead ends: 81 [2024-09-25 10:37:51,138 INFO L226 Difference]: Without dead ends: 75 [2024-09-25 10:37:51,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:37:51,140 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:37:51,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:37:51,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-25 10:37:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2024-09-25 10:37:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 12 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:37:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-09-25 10:37:51,180 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 44 [2024-09-25 10:37:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:37:51,180 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-09-25 10:37:51,180 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:37:51,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-09-25 10:37:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 10:37:51,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:37:51,184 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:37:51,197 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-25 10:37:51,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:51,385 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:37:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:37:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1973241337, now seen corresponding path program 3 times [2024-09-25 10:37:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:37:51,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129065553] [2024-09-25 10:37:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:37:51,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:37:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:37:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-25 10:37:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-25 10:37:51,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-25 10:37:51,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 10:37:51,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:37:51,436 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:37:51,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:37:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129065553] [2024-09-25 10:37:51,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129065553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:37:51,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213873944] [2024-09-25 10:37:51,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:37:51,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:37:51,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:37:51,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:37:51,439 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:37:51,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-25 10:37:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:37:51,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-25 10:37:51,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:37:52,274 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 10:37:52,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:38:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-25 10:38:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213873944] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:38:00,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:38:00,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14, 12] total 26 [2024-09-25 10:38:00,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236542426] [2024-09-25 10:38:00,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:38:00,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-25 10:38:00,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:38:00,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-25 10:38:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=556, Unknown=3, NotChecked=0, Total=650 [2024-09-25 10:38:00,729 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 26 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-25 10:38:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:38:04,493 INFO L93 Difference]: Finished difference Result 103 states and 130 transitions. [2024-09-25 10:38:04,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-25 10:38:04,493 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 44 [2024-09-25 10:38:04,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:38:04,494 INFO L225 Difference]: With dead ends: 103 [2024-09-25 10:38:04,494 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 10:38:04,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=373, Invalid=1786, Unknown=3, NotChecked=0, Total=2162 [2024-09-25 10:38:04,496 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:38:04,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 151 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-25 10:38:04,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 10:38:04,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 10:38:04,497 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) [2024-09-25 10:38:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 10:38:04,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2024-09-25 10:38:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:38:04,497 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 10:38:04,497 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 10 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-25 10:38:04,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:38:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 10:38:04,498 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 10:38:04,500 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 10:38:04,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 10:38:04,704 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:38:04,707 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2024-09-25 10:38:04,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 10:38:09,430 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-25 10:38:09,438 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-09-25 10:38:09,447 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:38:09,448 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:38:09,449 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:38:09,453 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:38:09 BoogieIcfgContainer [2024-09-25 10:38:09,453 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-25 10:38:09,454 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-25 10:38:09,454 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-25 10:38:09,454 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-25 10:38:09,454 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:37:43" (3/4) ... [2024-09-25 10:38:09,456 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-25 10:38:09,502 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-25 10:38:09,502 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-25 10:38:09,503 INFO L158 Benchmark]: Toolchain (without parser) took 26936.24ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 52.1MB in the beginning and 48.8MB in the end (delta: 3.3MB). Peak memory consumption was 83.2MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,503 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 10:38:09,503 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.37ms. Allocated memory is still 77.6MB. Free memory was 51.8MB in the beginning and 40.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,503 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.11ms. Allocated memory is still 77.6MB. Free memory was 40.2MB in the beginning and 39.3MB in the end (delta: 984.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,504 INFO L158 Benchmark]: Boogie Preprocessor took 45.81ms. Allocated memory is still 77.6MB. Free memory was 39.3MB in the beginning and 37.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,504 INFO L158 Benchmark]: RCFGBuilder took 291.99ms. Allocated memory is still 77.6MB. Free memory was 37.4MB in the beginning and 48.5MB in the end (delta: -11.1MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,504 INFO L158 Benchmark]: TraceAbstraction took 26310.05ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 47.8MB in the beginning and 50.9MB in the end (delta: -3.1MB). Peak memory consumption was 87.9MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,505 INFO L158 Benchmark]: Witness Printer took 48.40ms. Allocated memory is still 159.4MB. Free memory was 50.9MB in the beginning and 48.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:38:09,506 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 50.3MB. Free memory was 30.4MB in the beginning and 30.4MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 216.37ms. Allocated memory is still 77.6MB. Free memory was 51.8MB in the beginning and 40.2MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.11ms. Allocated memory is still 77.6MB. Free memory was 40.2MB in the beginning and 39.3MB in the end (delta: 984.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.81ms. Allocated memory is still 77.6MB. Free memory was 39.3MB in the beginning and 37.4MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 291.99ms. Allocated memory is still 77.6MB. Free memory was 37.4MB in the beginning and 48.5MB in the end (delta: -11.1MB). Peak memory consumption was 5.9MB. Max. memory is 16.1GB. * TraceAbstraction took 26310.05ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 47.8MB in the beginning and 50.9MB in the end (delta: -3.1MB). Peak memory consumption was 87.9MB. Max. memory is 16.1GB. * Witness Printer took 48.40ms. Allocated memory is still 159.4MB. Free memory was 50.9MB in the beginning and 48.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid * 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: 16]: 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 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 21.5s, OverallIterations: 8, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 99 SdHoareTripleChecker+Valid, 2.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 94 mSDsluCounter, 766 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 662 mSDsCounter, 71 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1410 IncrementalHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 71 mSolverCounterUnsat, 104 mSDtfsCounter, 1410 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 514 GetRequests, 341 SyntacticMatches, 9 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 13.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=7, InterpolantAutomatonStates: 123, 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, 8 MinimizatonAttempts, 41 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 12.3s InterpolantComputationTime, 442 NumberOfCodeBlocks, 424 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 521 ConstructedInterpolants, 4 QuantifiedInterpolants, 3039 SizeOfPredicates, 29 NumberOfNonLiveVariables, 669 ConjunctsInSsa, 133 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 342/477 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: 30]: Loop Invariant Derived loop invariant: (((Y <= 2147483647) && (0 <= (Y + 2147483648))) && ((((long long) Y * 2) + (2 * ((__int128) Y * x))) == (((((__int128) X * y) * 2) + X) + v))) - ProcedureContractResult [Line: 13]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-09-25 10:38:09,557 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