./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/functions_1-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/functions_1-1.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 d9fc6ec4480297fee1f7419ded78cafcfaf309d48a05ca3c98ab67dd7817eba5 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 22:59:36,175 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 22:59:36,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 22:59:36,261 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 22:59:36,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 22:59:36,292 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 22:59:36,293 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 22:59:36,293 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 22:59:36,294 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 22:59:36,295 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 22:59:36,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 22:59:36,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 22:59:36,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 22:59:36,298 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 22:59:36,299 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 22:59:36,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 22:59:36,299 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 22:59:36,299 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 22:59:36,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 22:59:36,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 22:59:36,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 22:59:36,302 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 22:59:36,303 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 22:59:36,304 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 22:59:36,304 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 22:59:36,304 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 22:59:36,304 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 22:59:36,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:59:36,305 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 22:59:36,305 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 22:59:36,305 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 22:59:36,305 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 22:59:36,305 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 22:59:36,305 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 22:59:36,306 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 22:59:36,306 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 22:59:36,308 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 22:59:36,308 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d9fc6ec4480297fee1f7419ded78cafcfaf309d48a05ca3c98ab67dd7817eba5 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 22:59:36,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 22:59:36,585 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 22:59:36,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 22:59:36,588 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 22:59:36,589 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 22:59:36,590 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/functions_1-1.c [2024-09-24 22:59:37,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 22:59:38,147 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 22:59:38,147 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/functions_1-1.c [2024-09-24 22:59:38,153 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/9ecf362da/66b8a9a331b443b48d930e496f43ebf9/FLAGf1e19ec15 [2024-09-24 22:59:38,164 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/9ecf362da/66b8a9a331b443b48d930e496f43ebf9 [2024-09-24 22:59:38,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 22:59:38,169 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 22:59:38,170 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 22:59:38,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 22:59:38,176 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 22:59:38,177 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,178 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47056d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38, skipping insertion in model container [2024-09-24 22:59:38,178 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,196 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 22:59:38,322 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/loop-acceleration/functions_1-1.c[325,338] [2024-09-24 22:59:38,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:59:38,347 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 22:59:38,372 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/loop-acceleration/functions_1-1.c[325,338] [2024-09-24 22:59:38,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 22:59:38,394 INFO L204 MainTranslator]: Completed translation [2024-09-24 22:59:38,395 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38 WrapperNode [2024-09-24 22:59:38,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 22:59:38,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 22:59:38,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 22:59:38,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 22:59:38,411 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,423 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,450 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 22:59:38,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 22:59:38,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 22:59:38,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 22:59:38,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 22:59:38,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,473 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 22:59:38,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,476 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,484 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,485 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 22:59:38,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 22:59:38,487 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 22:59:38,487 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 22:59:38,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (1/1) ... [2024-09-24 22:59:38,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 22:59:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:38,520 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 22:59:38,527 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 22:59:38,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 22:59:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 22:59:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 22:59:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-09-24 22:59:38,570 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-09-24 22:59:38,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 22:59:38,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 22:59:38,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 22:59:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 22:59:38,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 22:59:38,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 22:59:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 22:59:38,625 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 22:59:38,627 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 22:59:38,716 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-24 22:59:38,717 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 22:59:38,738 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 22:59:38,738 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-24 22:59:38,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:38 BoogieIcfgContainer [2024-09-24 22:59:38,739 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 22:59:38,740 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 22:59:38,740 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 22:59:38,743 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 22:59:38,743 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:59:38" (1/3) ... [2024-09-24 22:59:38,744 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea85ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:38, skipping insertion in model container [2024-09-24 22:59:38,744 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:59:38" (2/3) ... [2024-09-24 22:59:38,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ea85ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:59:38, skipping insertion in model container [2024-09-24 22:59:38,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:38" (3/3) ... [2024-09-24 22:59:38,746 INFO L112 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2024-09-24 22:59:38,761 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 22:59:38,761 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 22:59:38,817 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 22:59:38,825 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;@12399046, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 22:59:38,825 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 22:59:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-24 22:59:38,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-24 22:59:38,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:38,846 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:38,846 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:38,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:38,859 INFO L85 PathProgramCache]: Analyzing trace with hash 813527560, now seen corresponding path program 1 times [2024-09-24 22:59:38,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:38,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376281245] [2024-09-24 22:59:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:38,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:59:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:39,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376281245] [2024-09-24 22:59:39,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376281245] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:59:39,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:59:39,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 22:59:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571801403] [2024-09-24 22:59:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:59:39,028 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 22:59:39,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:39,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 22:59:39,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 22:59:39,048 INFO L87 Difference]: Start difference. First operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-09-24 22:59:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:39,068 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2024-09-24 22:59:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 22:59:39,070 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2024-09-24 22:59:39,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:39,074 INFO L225 Difference]: With dead ends: 32 [2024-09-24 22:59:39,074 INFO L226 Difference]: Without dead ends: 15 [2024-09-24 22:59:39,077 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 22:59:39,080 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:39,081 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:59:39,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-24 22:59:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-24 22:59:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:59:39,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-24 22:59:39,107 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2024-09-24 22:59:39,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:39,108 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-24 22:59:39,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2024-09-24 22:59:39,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:39,109 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-24 22:59:39,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-24 22:59:39,110 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:39,110 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:39,110 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 22:59:39,110 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:39,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:39,111 INFO L85 PathProgramCache]: Analyzing trace with hash 807986434, now seen corresponding path program 1 times [2024-09-24 22:59:39,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:39,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397367473] [2024-09-24 22:59:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:39,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:59:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397367473] [2024-09-24 22:59:39,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397367473] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 22:59:39,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 22:59:39,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 22:59:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748999320] [2024-09-24 22:59:39,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:59:39,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 22:59:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 22:59:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 22:59:39,257 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2024-09-24 22:59:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:39,287 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2024-09-24 22:59:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 22:59:39,288 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 [2024-09-24 22:59:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:39,289 INFO L225 Difference]: With dead ends: 23 [2024-09-24 22:59:39,289 INFO L226 Difference]: Without dead ends: 18 [2024-09-24 22:59:39,289 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 22:59:39,291 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:39,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:59:39,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-24 22:59:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2024-09-24 22:59:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:59:39,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2024-09-24 22:59:39,301 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2024-09-24 22:59:39,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:39,301 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2024-09-24 22:59:39,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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) [2024-09-24 22:59:39,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:39,302 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2024-09-24 22:59:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 22:59:39,303 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 22:59:39,303 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 22:59:39,303 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 22:59:39,303 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 22:59:39,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:39,304 INFO L85 PathProgramCache]: Analyzing trace with hash -311595235, now seen corresponding path program 1 times [2024-09-24 22:59:39,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 22:59:39,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479093880] [2024-09-24 22:59:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:39,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 22:59:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 22:59:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-24 22:59:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:59:39,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 22:59:39,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479093880] [2024-09-24 22:59:39,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479093880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:39,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702032243] [2024-09-24 22:59:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 22:59:39,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 22:59:39,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 22:59:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 22:59:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 22:59:39,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 22:59:39,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 22:59:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 22:59:39,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 22:59:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 22:59:39,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702032243] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 22:59:39,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 22:59:39,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 12 [2024-09-24 22:59:39,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912018092] [2024-09-24 22:59:39,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 22:59:39,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 22:59:39,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 22:59:39,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 22:59:39,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-24 22:59:39,853 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:59:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 22:59:39,925 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2024-09-24 22:59:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 22:59:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-24 22:59:39,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 22:59:39,926 INFO L225 Difference]: With dead ends: 16 [2024-09-24 22:59:39,926 INFO L226 Difference]: Without dead ends: 0 [2024-09-24 22:59:39,926 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2024-09-24 22:59:39,929 INFO L434 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 22:59:39,929 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 22:59:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-24 22:59:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-24 22:59:39,930 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) [2024-09-24 22:59:39,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-24 22:59:39,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2024-09-24 22:59:39,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 22:59:39,931 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-24 22:59:39,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-24 22:59:39,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 22:59:39,931 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-24 22:59:39,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-24 22:59:39,936 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-24 22:59:39,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 22:59:40,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 22:59:40,141 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-09-24 22:59:40,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-24 22:59:40,209 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-24 22:59:40,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:59:40 BoogieIcfgContainer [2024-09-24 22:59:40,227 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-24 22:59:40,230 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-24 22:59:40,231 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-24 22:59:40,231 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-24 22:59:40,231 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:59:38" (3/4) ... [2024-09-24 22:59:40,233 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-24 22:59:40,296 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-24 22:59:40,297 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-24 22:59:40,298 INFO L158 Benchmark]: Toolchain (without parser) took 2127.89ms. Allocated memory is still 161.5MB. Free memory was 92.6MB in the beginning and 130.9MB in the end (delta: -38.3MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,299 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 76.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-24 22:59:40,299 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.66ms. Allocated memory is still 161.5MB. Free memory was 92.4MB in the beginning and 132.8MB in the end (delta: -40.4MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,299 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.60ms. Allocated memory is still 161.5MB. Free memory was 132.8MB in the beginning and 131.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,299 INFO L158 Benchmark]: Boogie Preprocessor took 35.05ms. Allocated memory is still 161.5MB. Free memory was 131.6MB in the beginning and 130.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-24 22:59:40,300 INFO L158 Benchmark]: RCFGBuilder took 252.13ms. Allocated memory is still 161.5MB. Free memory was 130.1MB in the beginning and 118.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,300 INFO L158 Benchmark]: TraceAbstraction took 1486.71ms. Allocated memory is still 161.5MB. Free memory was 118.1MB in the beginning and 51.9MB in the end (delta: 66.2MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,300 INFO L158 Benchmark]: Witness Printer took 66.27ms. Allocated memory is still 161.5MB. Free memory was 51.9MB in the beginning and 130.9MB in the end (delta: -79.1MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. [2024-09-24 22:59:40,302 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 113.2MB. Free memory is still 76.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.66ms. Allocated memory is still 161.5MB. Free memory was 92.4MB in the beginning and 132.8MB in the end (delta: -40.4MB). Peak memory consumption was 15.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.60ms. Allocated memory is still 161.5MB. Free memory was 132.8MB in the beginning and 131.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.05ms. Allocated memory is still 161.5MB. Free memory was 131.6MB in the beginning and 130.1MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 252.13ms. Allocated memory is still 161.5MB. Free memory was 130.1MB in the beginning and 118.4MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1486.71ms. Allocated memory is still 161.5MB. Free memory was 118.1MB in the beginning and 51.9MB in the end (delta: 66.2MB). Peak memory consumption was 67.1MB. Max. memory is 16.1GB. * Witness Printer took 66.27ms. Allocated memory is still 161.5MB. Free memory was 51.9MB in the beginning and 130.9MB in the end (delta: -79.1MB). Peak memory consumption was 6.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 73 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 36 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 37 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 60 ConstructedInterpolants, 0 QuantifiedInterpolants, 133 SizeOfPredicates, 2 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 13 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 1/3 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: 19]: Loop Invariant Derived loop invariant: ((x % 2) == 0) - ProcedureContractResult [Line: 12]: Procedure Contract for f Derived contract for procedure f. Ensures: (((z % 2) != 0) || ((\result % 2) == 0)) - ProcedureContractResult [Line: 5]: 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! [2024-09-24 22:59:40,333 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