./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec.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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:30:14,224 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:30:14,307 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:30:14,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:30:14,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:30:14,343 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:30:14,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:30:14,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:30:14,345 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:30:14,346 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:30:14,346 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:30:14,347 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:30:14,348 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:30:14,348 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:30:14,350 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:30:14,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:30:14,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:30:14,351 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:30:14,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:30:14,351 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:30:14,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:30:14,355 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:30:14,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:30:14,356 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:30:14,356 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:30:14,356 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:30:14,357 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:30:14,357 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:30:14,357 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:30:14,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:30:14,358 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:30:14,358 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:30:14,358 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:14,359 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:30:14,359 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:30:14,360 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:30:14,360 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:30:14,361 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:30:14,361 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:30:14,361 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:30:14,362 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:30:14,362 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:30:14,362 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:30:14,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:30:14,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:30:14,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:30:14,610 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:30:14,610 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:30:14,611 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-11 20:30:16,008 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:30:16,166 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:30:16,167 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-11 20:30:16,172 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/c53fc2e1a/0ea8f015136b463b99ccd69c2f08ef7c/FLAGdd4a674f7 [2024-09-11 20:30:16,563 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/c53fc2e1a/0ea8f015136b463b99ccd69c2f08ef7c [2024-09-11 20:30:16,565 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:30:16,566 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:30:16,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:16,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:30:16,575 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:30:16,575 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,576 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e290e3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16, skipping insertion in model container [2024-09-11 20:30:16,577 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,596 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:30:16,725 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-11 20:30:16,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:16,753 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:30:16,764 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-11 20:30:16,777 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:16,793 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:30:16,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16 WrapperNode [2024-09-11 20:30:16,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:16,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:16,795 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:30:16,795 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:30:16,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,807 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,821 INFO L138 Inliner]: procedures = 19, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 26 [2024-09-11 20:30:16,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:16,822 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:30:16,822 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:30:16,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:30:16,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,831 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,834 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,846 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-11 20:30:16,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,851 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,855 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,857 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,858 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,860 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:30:16,861 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:30:16,861 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:30:16,861 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:30:16,862 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (1/1) ... [2024-09-11 20:30:16,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:16,894 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) [2024-09-11 20:30:16,898 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 [2024-09-11 20:30:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:30:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:30:16,948 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:30:16,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:30:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-11 20:30:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-11 20:30:16,949 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-11 20:30:16,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-11 20:30:16,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:30:16,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:30:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-11 20:30:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-11 20:30:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:30:16,951 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:30:16,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:30:17,040 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:30:17,042 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:30:17,229 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-09-11 20:30:17,229 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:30:17,274 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:30:17,274 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-11 20:30:17,275 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:17 BoogieIcfgContainer [2024-09-11 20:30:17,275 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:30:17,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:30:17,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:30:17,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:30:17,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:30:16" (1/3) ... [2024-09-11 20:30:17,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e676d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:17, skipping insertion in model container [2024-09-11 20:30:17,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:16" (2/3) ... [2024-09-11 20:30:17,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13e676d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:17, skipping insertion in model container [2024-09-11 20:30:17,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:17" (3/3) ... [2024-09-11 20:30:17,284 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2024-09-11 20:30:17,302 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:30:17,302 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:30:17,366 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:30:17,375 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;@1980826f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:30:17,375 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:30:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:30:17,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 20:30:17,386 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:17,387 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:17,387 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:17,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:17,394 INFO L85 PathProgramCache]: Analyzing trace with hash 8192486, now seen corresponding path program 1 times [2024-09-11 20:30:17,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:17,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905268070] [2024-09-11 20:30:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:17,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:17,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:17,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905268070] [2024-09-11 20:30:17,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905268070] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:17,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:30:17,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-11 20:30:17,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643588992] [2024-09-11 20:30:17,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:17,916 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-11 20:30:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:17,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-11 20:30:17,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-11 20:30:17,942 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:30:18,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:18,120 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2024-09-11 20:30:18,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 20:30:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-11 20:30:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:18,130 INFO L225 Difference]: With dead ends: 81 [2024-09-11 20:30:18,130 INFO L226 Difference]: Without dead ends: 52 [2024-09-11 20:30:18,133 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-11 20:30:18,136 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 18 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:18,137 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 128 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-11 20:30:18,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2024-09-11 20:30:18,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 30 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-11 20:30:18,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2024-09-11 20:30:18,198 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 14 [2024-09-11 20:30:18,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:18,200 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2024-09-11 20:30:18,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:30:18,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:18,201 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2024-09-11 20:30:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 20:30:18,203 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:18,204 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:18,204 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:30:18,205 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:18,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash -20163332, now seen corresponding path program 1 times [2024-09-11 20:30:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105911207] [2024-09-11 20:30:18,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:18,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:18,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:18,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105911207] [2024-09-11 20:30:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105911207] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:18,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763476103] [2024-09-11 20:30:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:18,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:18,581 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) [2024-09-11 20:30:18,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:30:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:18,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-11 20:30:18,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:18,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:18,876 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:30:18,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763476103] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:18,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:30:18,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 12 [2024-09-11 20:30:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091687911] [2024-09-11 20:30:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:18,880 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-11 20:30:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-11 20:30:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:30:18,881 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:30:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:19,116 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2024-09-11 20:30:19,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:30:19,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2024-09-11 20:30:19,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:19,118 INFO L225 Difference]: With dead ends: 62 [2024-09-11 20:30:19,120 INFO L226 Difference]: Without dead ends: 60 [2024-09-11 20:30:19,121 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:30:19,123 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:19,123 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 139 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-11 20:30:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 31. [2024-09-11 20:30:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:30:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-11 20:30:19,145 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2024-09-11 20:30:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:19,145 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-11 20:30:19,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:30:19,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-11 20:30:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 20:30:19,149 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:19,149 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:19,167 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:19,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:19,355 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:19,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:19,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1818029778, now seen corresponding path program 1 times [2024-09-11 20:30:19,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:19,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040162545] [2024-09-11 20:30:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:19,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-11 20:30:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-11 20:30:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-11 20:30:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-11 20:30:19,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:19,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040162545] [2024-09-11 20:30:19,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040162545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:19,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823119174] [2024-09-11 20:30:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:19,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:19,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:19,597 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) [2024-09-11 20:30:19,598 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:30:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:19,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-11 20:30:19,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:19,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-11 20:30:19,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2024-09-11 20:30:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:20,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823119174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:24,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:30:24,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2024-09-11 20:30:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366639891] [2024-09-11 20:30:24,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:24,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 20:30:24,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 20:30:24,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:30:24,130 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:30:24,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:24,406 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-09-11 20:30:24,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:30:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 33 [2024-09-11 20:30:24,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:24,407 INFO L225 Difference]: With dead ends: 37 [2024-09-11 20:30:24,407 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 20:30:24,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:30:24,409 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 32 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:24,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 195 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:30:24,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 20:30:24,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 20:30:24,410 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) [2024-09-11 20:30:24,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 20:30:24,411 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 33 [2024-09-11 20:30:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:24,411 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 20:30:24,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 7 states have call successors, (11), 6 states have call predecessors, (11), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2024-09-11 20:30:24,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 20:30:24,412 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 20:30:24,414 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 20:30:24,431 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:24,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:24,618 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2024-09-11 20:30:24,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 20:30:25,811 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 20:30:25,826 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: unknown symbol (const Int (Array Int Int)) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:272) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:173) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:137) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:401) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBacktranslator.translateExpression(RCFGBacktranslator.java:1) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpression(ModelTranslationContainer.java:126) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateExpressionToString(ModelTranslationContainer.java:109) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.BacktranslationService.translateExpressionToString(BacktranslationService.java:92) at de.uni_freiburg.informatik.ultimate.core.lib.results.ProcedureContractResult.translateTerm(ProcedureContractResult.java:69) at de.uni_freiburg.informatik.ultimate.core.lib.results.ProcedureContractResult.(ProcedureContractResult.java:59) at de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.FloydHoareUtils.createProcedureContractResults(FloydHoareUtils.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:194) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-09-11 20:30:25,831 INFO L158 Benchmark]: Toolchain (without parser) took 9264.44ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 98.8MB in the beginning and 167.7MB in the end (delta: -68.9MB). Peak memory consumption was 95.8MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,831 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 117.1MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 20:30:25,831 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.47ms. Allocated memory is still 153.1MB. Free memory was 98.8MB in the beginning and 87.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,832 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.87ms. Allocated memory is still 153.1MB. Free memory was 87.4MB in the beginning and 85.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,832 INFO L158 Benchmark]: Boogie Preprocessor took 37.49ms. Allocated memory is still 153.1MB. Free memory was 85.6MB in the beginning and 83.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,832 INFO L158 Benchmark]: RCFGBuilder took 414.38ms. Allocated memory is still 153.1MB. Free memory was 83.6MB in the beginning and 68.9MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,832 INFO L158 Benchmark]: TraceAbstraction took 8553.41ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 67.9MB in the beginning and 167.7MB in the end (delta: -99.8MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. [2024-09-11 20:30:25,837 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 153.1MB. Free memory was 117.3MB in the beginning and 117.1MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.47ms. Allocated memory is still 153.1MB. Free memory was 98.8MB in the beginning and 87.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.87ms. Allocated memory is still 153.1MB. Free memory was 87.4MB in the beginning and 85.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.49ms. Allocated memory is still 153.1MB. Free memory was 85.6MB in the beginning and 83.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 414.38ms. Allocated memory is still 153.1MB. Free memory was 83.6MB in the beginning and 68.9MB in the end (delta: 14.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8553.41ms. Allocated memory was 153.1MB in the beginning and 207.6MB in the end (delta: 54.5MB). Free memory was 67.9MB in the beginning and 167.7MB in the end (delta: -99.8MB). Peak memory consumption was 64.3MB. 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: 11]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.3s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 92 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 89 mSDsluCounter, 462 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 384 mSDsCounter, 54 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 399 IncrementalHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 54 mSolverCounterUnsat, 78 mSDtfsCounter, 399 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 113 GetRequests, 66 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 4.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=1, InterpolantAutomatonStates: 25, 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, 3 MinimizatonAttempts, 36 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 5.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 123 ConstructedInterpolants, 13 QuantifiedInterpolants, 591 SizeOfPredicates, 17 NumberOfNonLiveVariables, 270 ConjunctsInSsa, 42 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/26 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Location Invariant Derived location invariant: 1 - ExceptionOrErrorResult: IllegalArgumentException: unknown symbol (const Int (Array Int Int)) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: unknown symbol (const Int (Array Int Int)): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.boogie.Term2Expression.translate(Term2Expression.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2024-09-11 20:30:25,875 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.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 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:30:27,975 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:30:28,062 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-09-11 20:30:28,072 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:30:28,072 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:30:28,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:30:28,105 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:30:28,105 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:30:28,106 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:30:28,107 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:30:28,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:30:28,108 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:30:28,109 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:30:28,109 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:30:28,112 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:30:28,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:30:28,113 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:30:28,113 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:30:28,113 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:30:28,114 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:30:28,114 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:30:28,114 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:30:28,115 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:30:28,115 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-09-11 20:30:28,115 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-09-11 20:30:28,116 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:30:28,116 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-09-11 20:30:28,116 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:30:28,116 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:30:28,117 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:30:28,117 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:30:28,117 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:30:28,117 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:30:28,118 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:30:28,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:28,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:30:28,122 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:30:28,122 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:30:28,123 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-09-11 20:30:28,123 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-09-11 20:30:28,123 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:30:28,124 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:30:28,124 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:30:28,124 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:30:28,124 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-09-11 20:30:28,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d89bfe4b4c4586e423a8e3ebdbb120ac074219803de53807cd9f075553c6e3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:30:28,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:30:28,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:30:28,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:30:28,488 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:30:28,489 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:30:28,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-11 20:30:30,044 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:30:30,246 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:30:30,247 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c [2024-09-11 20:30:30,256 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0f92ca754/c94814a460f147fd9d36791063321d3c/FLAGc5695436c [2024-09-11 20:30:30,272 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0f92ca754/c94814a460f147fd9d36791063321d3c [2024-09-11 20:30:30,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:30:30,277 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:30:30,279 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:30,279 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:30:30,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:30:30,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17c46677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30, skipping insertion in model container [2024-09-11 20:30:30,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,308 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:30:30,470 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-11 20:30:30,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:30,510 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:30:30,523 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/verifythis/elimination_max_rec.c[493,506] [2024-09-11 20:30:30,537 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:30:30,556 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:30:30,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30 WrapperNode [2024-09-11 20:30:30,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:30:30,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:30,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:30:30,560 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:30:30,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,593 INFO L138 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 24 [2024-09-11 20:30:30,594 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:30:30,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:30:30,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:30:30,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:30:30,605 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,609 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,628 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-11 20:30:30,629 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,629 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,639 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,642 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,643 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,644 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,650 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:30:30,651 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:30:30,651 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:30:30,651 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:30:30,652 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (1/1) ... [2024-09-11 20:30:30,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:30:30,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:30,684 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) [2024-09-11 20:30:30,687 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 [2024-09-11 20:30:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:30:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-09-11 20:30:30,727 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-09-11 20:30:30,728 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-11 20:30:30,728 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-11 20:30:30,729 INFO L130 BoogieDeclarations]: Found specification of procedure check [2024-09-11 20:30:30,729 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:30:30,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-11 20:30:30,730 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-11 20:30:30,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-09-11 20:30:30,831 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:30:30,833 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:30:31,049 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-09-11 20:30:31,049 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:30:31,099 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:30:31,099 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-11 20:30:31,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:31 BoogieIcfgContainer [2024-09-11 20:30:31,100 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:30:31,103 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:30:31,103 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:30:31,106 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:30:31,106 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:30:30" (1/3) ... [2024-09-11 20:30:31,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216d874a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:31, skipping insertion in model container [2024-09-11 20:30:31,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:30:30" (2/3) ... [2024-09-11 20:30:31,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@216d874a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:30:31, skipping insertion in model container [2024-09-11 20:30:31,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:30:31" (3/3) ... [2024-09-11 20:30:31,109 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2024-09-11 20:30:31,123 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:30:31,124 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:30:31,184 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:30:31,191 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;@33b89086, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:30:31,191 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:30:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:30:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-11 20:30:31,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:31,203 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:31,203 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:31,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash 8192486, now seen corresponding path program 1 times [2024-09-11 20:30:31,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-11 20:30:31,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [385436989] [2024-09-11 20:30:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:31,220 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:30:31,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-11 20:30:31,224 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-11 20:30:31,225 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-09-11 20:30:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:31,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-11 20:30:31,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:31,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:30:31,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-11 20:30:31,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [385436989] [2024-09-11 20:30:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [385436989] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:31,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:30:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-09-11 20:30:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882518108] [2024-09-11 20:30:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:31,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-11 20:30:31,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-11 20:30:31,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-11 20:30:31,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-09-11 20:30:31,796 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:30:32,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:32,153 INFO L93 Difference]: Finished difference Result 73 states and 99 transitions. [2024-09-11 20:30:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:30:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-11 20:30:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:32,163 INFO L225 Difference]: With dead ends: 73 [2024-09-11 20:30:32,163 INFO L226 Difference]: Without dead ends: 41 [2024-09-11 20:30:32,168 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:30:32,172 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:32,175 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 126 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-11 20:30:32,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-11 20:30:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-11 20:30:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-11 20:30:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2024-09-11 20:30:32,215 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 14 [2024-09-11 20:30:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:32,216 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2024-09-11 20:30:32,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:30:32,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2024-09-11 20:30:32,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-11 20:30:32,218 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:32,219 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:32,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-09-11 20:30:32,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:30:32,422 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:32,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:32,422 INFO L85 PathProgramCache]: Analyzing trace with hash -20163332, now seen corresponding path program 1 times [2024-09-11 20:30:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-11 20:30:32,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308365543] [2024-09-11 20:30:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:32,423 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:30:32,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-11 20:30:32,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-11 20:30:32,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-09-11 20:30:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:32,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 20:30:32,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:32,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:32,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:33,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-11 20:30:33,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308365543] [2024-09-11 20:30:33,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308365543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:33,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:30:33,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 20 [2024-09-11 20:30:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221124522] [2024-09-11 20:30:33,334 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:33,335 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 20:30:33,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-11 20:30:33,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 20:30:33,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:30:33,338 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:30:34,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:34,697 INFO L93 Difference]: Finished difference Result 100 states and 132 transitions. [2024-09-11 20:30:34,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:30:34,698 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2024-09-11 20:30:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:34,702 INFO L225 Difference]: With dead ends: 100 [2024-09-11 20:30:34,702 INFO L226 Difference]: Without dead ends: 98 [2024-09-11 20:30:34,703 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:30:34,704 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:34,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 344 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-11 20:30:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-11 20:30:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 74. [2024-09-11 20:30:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 49 states have internal predecessors, (53), 21 states have call successors, (21), 8 states have call predecessors, (21), 7 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-11 20:30:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2024-09-11 20:30:34,746 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 24 [2024-09-11 20:30:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:34,747 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2024-09-11 20:30:34,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.631578947368421) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-11 20:30:34,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:34,750 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2024-09-11 20:30:34,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 20:30:34,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:34,752 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:34,757 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-09-11 20:30:34,952 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:30:34,953 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:34,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:34,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1818029778, now seen corresponding path program 1 times [2024-09-11 20:30:34,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-11 20:30:34,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739455915] [2024-09-11 20:30:34,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:34,955 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:30:34,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-11 20:30:34,958 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-11 20:30:34,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-09-11 20:30:35,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:35,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 20:30:35,044 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:40,741 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-11 20:30:40,742 INFO L173 IndexEqualityManager]: detected equality via solver [2024-09-11 20:30:40,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-09-11 20:30:40,943 INFO L349 Elim1Store]: treesize reduction 96, result has 47.3 percent of original size [2024-09-11 20:30:40,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 56 treesize of output 101 [2024-09-11 20:30:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:30:41,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:41,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-11 20:30:41,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739455915] [2024-09-11 20:30:41,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739455915] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:41,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830164956] [2024-09-11 20:30:41,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:41,529 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-09-11 20:30:41,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/cvc4 [2024-09-11 20:30:41,531 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-09-11 20:30:41,532 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-09-11 20:30:41,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-11 20:30:41,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:41,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-09-11 20:31:00,807 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_3) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-11 20:31:06,580 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_4) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-11 20:31:13,053 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 (_ BitVec 32))) (= (select |c_#memory_int#1| v_check_~a.base_BEFORE_CALL_5) ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) is different from true [2024-09-11 20:31:15,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2024-09-11 20:31:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2024-09-11 20:31:15,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:31:35,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1830164956] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:31:35,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:31:35,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 11] total 30 [2024-09-11 20:31:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760732607] [2024-09-11 20:31:35,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:31:35,664 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:31:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-11 20:31:35,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:31:35,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=893, Unknown=11, NotChecked=186, Total=1190 [2024-09-11 20:31:35,667 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 30 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-11 20:31:37,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:32:26,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-11 20:33:45,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:45,965 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2024-09-11 20:33:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 20:33:45,966 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 33 [2024-09-11 20:33:45,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:45,967 INFO L225 Difference]: With dead ends: 137 [2024-09-11 20:33:45,967 INFO L226 Difference]: Without dead ends: 48 [2024-09-11 20:33:45,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 182.9s TimeCoverageRelationStatistics Valid=341, Invalid=2297, Unknown=26, NotChecked=306, Total=2970 [2024-09-11 20:33:45,971 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:45,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 317 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 474 Invalid, 0 Unknown, 155 Unchecked, 6.7s Time] [2024-09-11 20:33:45,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-11 20:33:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2024-09-11 20:33:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 9 states have call successors, (9), 8 states have call predecessors, (9), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:33:45,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2024-09-11 20:33:45,986 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 33 [2024-09-11 20:33:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:45,986 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2024-09-11 20:33:45,987 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 24 states have (on average 1.75) internal successors, (42), 22 states have internal predecessors, (42), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-11 20:33:45,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2024-09-11 20:33:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-11 20:33:45,988 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:33:45,988 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:33:45,996 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-09-11 20:33:46,198 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:33:46,392 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /storage/repos/certificate-witnesses-artifact/automizer/cvc4 --incremental --print-success --lang smt [2024-09-11 20:33:46,392 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:33:46,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:46,393 INFO L85 PathProgramCache]: Analyzing trace with hash -716797338, now seen corresponding path program 1 times [2024-09-11 20:33:46,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-09-11 20:33:46,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561248456] [2024-09-11 20:33:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:33:46,394 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:33:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/mathsat [2024-09-11 20:33:46,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-09-11 20:33:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-09-11 20:33:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:33:46,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-11 20:33:46,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:33:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:33:47,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:33:50,028 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 19 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:33:50,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-09-11 20:33:50,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [561248456] [2024-09-11 20:33:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [561248456] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:33:50,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-11 20:33:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2024-09-11 20:33:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441033956] [2024-09-11 20:33:50,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-11 20:33:50,030 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 20:33:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-09-11 20:33:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 20:33:50,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:33:50,031 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 31 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 10 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:33:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:33:56,474 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2024-09-11 20:33:56,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-11 20:33:56,475 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 10 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 44 [2024-09-11 20:33:56,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:33:56,476 INFO L225 Difference]: With dead ends: 77 [2024-09-11 20:33:56,476 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 20:33:56,478 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=610, Invalid=2582, Unknown=0, NotChecked=0, Total=3192 [2024-09-11 20:33:56,478 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-11 20:33:56,479 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 135 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-11 20:33:56,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 20:33:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 20:33:56,480 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) [2024-09-11 20:33:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 20:33:56,480 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2024-09-11 20:33:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:33:56,481 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 20:33:56,481 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 23 states have internal predecessors, (50), 12 states have call successors, (17), 10 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2024-09-11 20:33:56,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:33:56,481 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 20:33:56,481 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 20:33:56,484 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 20:33:56,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-09-11 20:33:56,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-09-11 20:33:56,693 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-09-11 20:33:56,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 20:34:02,136 WARN L293 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 129 DAG size of output: 15 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-11 20:34:16,659 WARN L293 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 183 DAG size of output: 82 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-11 20:34:24,326 WARN L293 SmtUtils]: Spent 7.66s on a formula simplification. DAG size of input: 170 DAG size of output: 57 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter) [2024-09-11 20:34:36,790 WARN L293 SmtUtils]: Spent 12.39s on a formula simplification. DAG size of input: 56 DAG size of output: 19 (called from [L 162] de.uni_freiburg.informatik.ultimate.lib.proofs.floydhoare.HoareAnnotationComposer.combineInter)