./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 bd4ff7f95c7aab1abb3428488ee9247a9f3cbeb30d436182472263a0c2dcf758 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 02:37:34,171 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 02:37:34,245 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 02:37:34,259 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 02:37:34,261 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 02:37:34,293 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 02:37:34,294 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 02:37:34,294 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 02:37:34,295 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 02:37:34,295 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 02:37:34,296 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 02:37:34,296 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 02:37:34,297 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 02:37:34,299 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 02:37:34,299 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 02:37:34,299 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 02:37:34,300 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 02:37:34,300 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 02:37:34,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 02:37:34,300 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 02:37:34,300 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 02:37:34,301 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 02:37:34,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 02:37:34,305 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 02:37:34,305 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 02:37:34,305 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 02:37:34,305 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 02:37:34,306 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 02:37:34,306 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 02:37:34,306 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 02:37:34,306 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 02:37:34,307 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 02:37:34,307 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:37:34,307 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 02:37:34,307 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 02:37:34,307 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 02:37:34,307 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 02:37:34,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 02:37:34,308 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 02:37:34,308 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 02:37:34,308 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 02:37:34,309 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 02:37:34,309 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd4ff7f95c7aab1abb3428488ee9247a9f3cbeb30d436182472263a0c2dcf758 [2024-10-14 02:37:34,573 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 02:37:34,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 02:37:34,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 02:37:34,606 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 02:37:34,607 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 02:37:34,608 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c [2024-10-14 02:37:36,040 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 02:37:36,208 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 02:37:36,209 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c [2024-10-14 02:37:36,215 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a06fa0d6/c75bb68846a340148d7777840c12e7e8/FLAGab586f108 [2024-10-14 02:37:36,226 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a06fa0d6/c75bb68846a340148d7777840c12e7e8 [2024-10-14 02:37:36,229 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 02:37:36,230 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 02:37:36,231 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 02:37:36,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 02:37:36,237 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 02:37:36,238 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,238 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e5b1b0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36, skipping insertion in model container [2024-10-14 02:37:36,239 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,258 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 02:37:36,406 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c[458,471] [2024-10-14 02:37:36,423 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:37:36,431 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 02:37:36,442 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound1.c[458,471] [2024-10-14 02:37:36,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 02:37:36,466 INFO L204 MainTranslator]: Completed translation [2024-10-14 02:37:36,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36 WrapperNode [2024-10-14 02:37:36,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 02:37:36,468 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 02:37:36,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 02:37:36,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 02:37:36,475 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,482 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,498 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2024-10-14 02:37:36,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 02:37:36,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 02:37:36,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 02:37:36,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 02:37:36,510 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,515 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,532 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-10-14 02:37:36,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,539 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,545 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,546 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 02:37:36,547 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 02:37:36,547 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 02:37:36,547 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 02:37:36,548 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (1/1) ... [2024-10-14 02:37:36,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 02:37:36,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:37:36,579 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 02:37:36,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 02:37:36,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 02:37:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-14 02:37:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-14 02:37:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 02:37:36,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 02:37:36,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 02:37:36,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-14 02:37:36,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-14 02:37:36,685 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 02:37:36,687 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 02:37:36,788 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-14 02:37:36,789 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 02:37:36,821 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 02:37:36,821 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-14 02:37:36,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:37:36 BoogieIcfgContainer [2024-10-14 02:37:36,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 02:37:36,823 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 02:37:36,823 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 02:37:36,826 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 02:37:36,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:37:36" (1/3) ... [2024-10-14 02:37:36,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e13bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:37:36, skipping insertion in model container [2024-10-14 02:37:36,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:37:36" (2/3) ... [2024-10-14 02:37:36,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e13bdc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:37:36, skipping insertion in model container [2024-10-14 02:37:36,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:37:36" (3/3) ... [2024-10-14 02:37:36,828 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound1.c [2024-10-14 02:37:36,843 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 02:37:36,843 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 02:37:36,894 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 02:37:36,900 INFO L333 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=LoopHeads, 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;@67c5e926, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 02:37:36,901 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-14 02:37:36,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 02:37:36,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 02:37:36,910 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:37:36,910 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:37:36,911 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:37:36,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:37:36,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2024-10-14 02:37:36,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:37:36,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690795992] [2024-10-14 02:37:36,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:36,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:37:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:37,098 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:37:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:37,110 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:37:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:37,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:37:37,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:37:37,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690795992] [2024-10-14 02:37:37,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690795992] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:37:37,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:37:37,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 02:37:37,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134088628] [2024-10-14 02:37:37,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:37:37,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-14 02:37:37,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:37:37,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-14 02:37:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:37:37,168 INFO L87 Difference]: Start difference. First operand has 21 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 02:37:37,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:37:37,200 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-10-14 02:37:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-14 02:37:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-10-14 02:37:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:37:37,208 INFO L225 Difference]: With dead ends: 40 [2024-10-14 02:37:37,209 INFO L226 Difference]: Without dead ends: 19 [2024-10-14 02:37:37,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-14 02:37:37,218 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:37:37,220 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:37:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-14 02:37:37,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-14 02:37:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-14 02:37:37,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-14 02:37:37,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2024-10-14 02:37:37,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:37:37,258 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-14 02:37:37,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-10-14 02:37:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-14 02:37:37,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-14 02:37:37,291 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:37:37,291 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:37:37,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 02:37:37,292 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:37:37,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:37:37,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2024-10-14 02:37:37,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:37:37,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499792468] [2024-10-14 02:37:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:37:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:37:37,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113847221] [2024-10-14 02:37:37,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:37,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:37,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:37:37,380 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:37:37,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 02:37:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:37,467 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 02:37:37,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:37:37,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:37:37,589 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 02:37:37,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:37:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499792468] [2024-10-14 02:37:37,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:37:37,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113847221] [2024-10-14 02:37:37,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113847221] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 02:37:37,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 02:37:37,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 02:37:37,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201710594] [2024-10-14 02:37:37,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:37:37,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:37:37,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:37:37,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:37:37,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 02:37:37,598 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:37:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:37:37,668 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-10-14 02:37:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:37:37,669 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-10-14 02:37:37,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:37:37,670 INFO L225 Difference]: With dead ends: 30 [2024-10-14 02:37:37,670 INFO L226 Difference]: Without dead ends: 26 [2024-10-14 02:37:37,671 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-14 02:37:37,672 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:37:37,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:37:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-14 02:37:37,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-14 02:37:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 02:37:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-14 02:37:37,685 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-10-14 02:37:37,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:37:37,685 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-14 02:37:37,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-10-14 02:37:37,686 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-14 02:37:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-14 02:37:37,687 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:37:37,687 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:37:37,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-14 02:37:37,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:37,892 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:37:37,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:37:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2024-10-14 02:37:37,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:37:37,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870108883] [2024-10-14 02:37:37,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:37:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:37:37,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736578539] [2024-10-14 02:37:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:37,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:37,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:37:37,924 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:37:37,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 02:37:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:37,988 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 02:37:37,991 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:37:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 02:37:38,087 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:37:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 02:37:38,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:37:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870108883] [2024-10-14 02:37:38,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:37:38,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736578539] [2024-10-14 02:37:38,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736578539] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 02:37:38,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 02:37:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-14 02:37:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116313957] [2024-10-14 02:37:38,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 02:37:38,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 02:37:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:37:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 02:37:38,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-14 02:37:38,218 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 02:37:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:37:38,275 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-10-14 02:37:38,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 02:37:38,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2024-10-14 02:37:38,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:37:38,277 INFO L225 Difference]: With dead ends: 32 [2024-10-14 02:37:38,278 INFO L226 Difference]: Without dead ends: 28 [2024-10-14 02:37:38,279 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-14 02:37:38,280 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-14 02:37:38,282 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-14 02:37:38,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-14 02:37:38,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-14 02:37:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-10-14 02:37:38,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-14 02:37:38,298 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2024-10-14 02:37:38,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:37:38,299 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-14 02:37:38,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-10-14 02:37:38,299 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-14 02:37:38,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-14 02:37:38,300 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:37:38,301 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:37:38,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 02:37:38,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-10-14 02:37:38,504 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:37:38,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:37:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2024-10-14 02:37:38,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:37:38,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116006905] [2024-10-14 02:37:38,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:38,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:37:38,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-14 02:37:38,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1638858633] [2024-10-14 02:37:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:38,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:37:38,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:37:38,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 02:37:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:38,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 02:37:38,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:37:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 02:37:38,755 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:37:38,910 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 02:37:38,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:37:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116006905] [2024-10-14 02:37:38,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-14 02:37:38,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638858633] [2024-10-14 02:37:38,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638858633] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:37:38,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 02:37:38,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-10-14 02:37:38,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864771739] [2024-10-14 02:37:38,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 02:37:38,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 02:37:38,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:37:38,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 02:37:38,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-10-14 02:37:38,914 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 02:37:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:37:39,048 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-10-14 02:37:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 02:37:39,050 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-14 02:37:39,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:37:39,051 INFO L225 Difference]: With dead ends: 45 [2024-10-14 02:37:39,051 INFO L226 Difference]: Without dead ends: 37 [2024-10-14 02:37:39,051 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-10-14 02:37:39,052 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:37:39,053 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 131 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:37:39,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-10-14 02:37:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2024-10-14 02:37:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-14 02:37:39,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-10-14 02:37:39,078 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 35 [2024-10-14 02:37:39,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:37:39,079 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-10-14 02:37:39,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 7 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-14 02:37:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-10-14 02:37:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-14 02:37:39,081 INFO L207 NwaCegarLoop]: Found error trace [2024-10-14 02:37:39,081 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 02:37:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 02:37:39,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:39,286 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-14 02:37:39,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 02:37:39,287 INFO L85 PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times [2024-10-14 02:37:39,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 02:37:39,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486990707] [2024-10-14 02:37:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 02:37:39,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 02:37:39,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,630 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-14 02:37:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,666 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-14 02:37:39,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,677 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-14 02:37:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,687 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-14 02:37:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-14 02:37:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,710 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-14 02:37:39,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,724 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-14 02:37:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,729 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-14 02:37:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 02:37:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-14 02:37:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 02:37:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486990707] [2024-10-14 02:37:39,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486990707] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 02:37:39,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850417890] [2024-10-14 02:37:39,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 02:37:39,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:39,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 02:37:39,744 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-14 02:37:39,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 02:37:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 02:37:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 02:37:39,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 02:37:39,804 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 02:37:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-14 02:37:39,970 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 02:37:40,162 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-14 02:37:40,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850417890] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 02:37:40,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 02:37:40,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-14 02:37:40,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807209071] [2024-10-14 02:37:40,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 02:37:40,164 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 02:37:40,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 02:37:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 02:37:40,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-10-14 02:37:40,165 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-10-14 02:37:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-14 02:37:40,242 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2024-10-14 02:37:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 02:37:40,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) Word has length 56 [2024-10-14 02:37:40,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-14 02:37:40,244 INFO L225 Difference]: With dead ends: 43 [2024-10-14 02:37:40,244 INFO L226 Difference]: Without dead ends: 0 [2024-10-14 02:37:40,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2024-10-14 02:37:40,246 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-14 02:37:40,249 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-14 02:37:40,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-14 02:37:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-14 02:37:40,250 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) [2024-10-14 02:37:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-14 02:37:40,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2024-10-14 02:37:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-14 02:37:40,250 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-14 02:37:40,251 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 16 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (20), 15 states have call predecessors, (20), 16 states have call successors, (20) [2024-10-14 02:37:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-14 02:37:40,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-14 02:37:40,253 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-14 02:37:40,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-14 02:37:40,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 02:37:40,463 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-10-14 02:37:40,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-14 02:37:40,646 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-14 02:37:40,662 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 02:37:40 BoogieIcfgContainer [2024-10-14 02:37:40,662 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-14 02:37:40,663 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-14 02:37:40,663 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-14 02:37:40,663 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-14 02:37:40,663 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:37:36" (3/4) ... [2024-10-14 02:37:40,665 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-14 02:37:40,668 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-10-14 02:37:40,669 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-14 02:37:40,672 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-10-14 02:37:40,673 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-14 02:37:40,673 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-14 02:37:40,673 INFO L904 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-14 02:37:40,759 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-14 02:37:40,759 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-14 02:37:40,760 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-14 02:37:40,760 INFO L158 Benchmark]: Toolchain (without parser) took 4530.31ms. Allocated memory was 176.2MB in the beginning and 262.1MB in the end (delta: 86.0MB). Free memory was 120.5MB in the beginning and 198.0MB in the end (delta: -77.5MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,760 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 176.2MB. Free memory is still 138.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 02:37:40,761 INFO L158 Benchmark]: CACSL2BoogieTranslator took 236.51ms. Allocated memory is still 176.2MB. Free memory was 120.5MB in the beginning and 108.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,761 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.34ms. Allocated memory is still 176.2MB. Free memory was 108.5MB in the beginning and 107.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,761 INFO L158 Benchmark]: Boogie Preprocessor took 46.38ms. Allocated memory is still 176.2MB. Free memory was 107.3MB in the beginning and 105.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,761 INFO L158 Benchmark]: RCFGBuilder took 274.11ms. Allocated memory is still 176.2MB. Free memory was 105.3MB in the beginning and 93.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,762 INFO L158 Benchmark]: TraceAbstraction took 3839.15ms. Allocated memory was 176.2MB in the beginning and 262.1MB in the end (delta: 86.0MB). Free memory was 93.3MB in the beginning and 202.2MB in the end (delta: -108.9MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 02:37:40,762 INFO L158 Benchmark]: Witness Printer took 97.13ms. Allocated memory is still 262.1MB. Free memory was 202.2MB in the beginning and 198.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-14 02:37:40,763 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 176.2MB. Free memory is still 138.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 236.51ms. Allocated memory is still 176.2MB. Free memory was 120.5MB in the beginning and 108.5MB in the end (delta: 12.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.34ms. Allocated memory is still 176.2MB. Free memory was 108.5MB in the beginning and 107.3MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.38ms. Allocated memory is still 176.2MB. Free memory was 107.3MB in the beginning and 105.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 274.11ms. Allocated memory is still 176.2MB. Free memory was 105.3MB in the beginning and 93.8MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3839.15ms. Allocated memory was 176.2MB in the beginning and 262.1MB in the end (delta: 86.0MB). Free memory was 93.3MB in the beginning and 202.2MB in the end (delta: -108.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 97.13ms. Allocated memory is still 262.1MB. Free memory was 202.2MB in the beginning and 198.0MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 12]: 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 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.6s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 358 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 268 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 168 IncrementalHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 90 mSDtfsCounter, 168 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 235 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 30, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 311 ConstructedInterpolants, 0 QuantifiedInterpolants, 964 SizeOfPredicates, 4 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 366/392 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: 28]: Loop Invariant Derived loop invariant: (((((k == 1) && (c == 1)) && (x == 1)) && (y == 1)) || (((((0 <= k) && (c == 0)) && (k <= 1)) && (y == 0)) && (x == 0))) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-10-14 02:37:40,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE