./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/ps6-ll_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4a390ef5 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/ps6-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 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:30:48,148 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:30:48,223 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:30:48,226 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:30:48,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:30:48,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:30:48,249 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:30:48,249 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:30:48,250 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:30:48,250 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:30:48,250 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:30:48,251 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:30:48,251 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:30:48,251 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:30:48,252 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:30:48,252 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:30:48,252 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:30:48,253 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:30:48,253 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:30:48,256 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:30:48,256 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:30:48,256 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:30:48,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:30:48,260 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:30:48,260 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:30:48,260 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:30:48,261 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:30:48,261 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:30:48,261 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:30:48,262 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:30:48,262 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:30:48,262 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:30:48,262 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:30:48,263 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:30:48,263 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:30:48,263 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:30:48,263 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:30:48,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:30:48,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:30:48,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:30:48,264 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:30:48,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:30:48,266 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87608ec580cc80a59c7836f9aeadd0fc773dea5ebb620dd020651936daa4e397 [2024-10-24 00:30:48,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:30:48,543 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:30:48,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:30:48,547 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:30:48,547 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:30:48,548 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-10-24 00:30:49,962 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:30:50,130 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:30:50,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound1.c [2024-10-24 00:30:50,137 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2dc0b75/dd4f3b91c9d54692ab605265a991e6ad/FLAG13e9cbcb3 [2024-10-24 00:30:50,147 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b2dc0b75/dd4f3b91c9d54692ab605265a991e6ad [2024-10-24 00:30:50,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:30:50,151 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:30:50,152 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:30:50,153 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:30:50,158 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:30:50,160 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,161 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@416d97fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50, skipping insertion in model container [2024-10-24 00:30:50,161 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,184 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:30:50,365 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/ps6-ll_valuebound1.c[458,471] [2024-10-24 00:30:50,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:30:50,389 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:30:50,400 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/ps6-ll_valuebound1.c[458,471] [2024-10-24 00:30:50,406 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:30:50,421 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:30:50,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50 WrapperNode [2024-10-24 00:30:50,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:30:50,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:30:50,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:30:50,423 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:30:50,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,437 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,450 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2024-10-24 00:30:50,450 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:30:50,451 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:30:50,451 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:30:50,451 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:30:50,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,460 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,461 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,471 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]. [2024-10-24 00:30:50,472 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,472 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,474 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,477 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,477 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,479 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:30:50,480 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:30:50,480 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:30:50,481 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:30:50,481 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (1/1) ... [2024-10-24 00:30:50,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:30:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:30:50,520 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) [2024-10-24 00:30:50,524 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 [2024-10-24 00:30:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:30:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:30:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:30:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:30:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:30:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:30:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:30:50,576 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:30:50,641 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:30:50,645 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:30:50,886 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-24 00:30:50,887 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:30:50,912 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:30:50,912 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 00:30:50,912 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:30:50 BoogieIcfgContainer [2024-10-24 00:30:50,913 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:30:50,915 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:30:50,916 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:30:50,920 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:30:50,920 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:30:50" (1/3) ... [2024-10-24 00:30:50,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:30:50, skipping insertion in model container [2024-10-24 00:30:50,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:30:50" (2/3) ... [2024-10-24 00:30:50,921 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a18a268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:30:50, skipping insertion in model container [2024-10-24 00:30:50,921 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:30:50" (3/3) ... [2024-10-24 00:30:50,923 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound1.c [2024-10-24 00:30:50,937 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:30:50,937 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:30:50,994 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:30:51,000 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;@75a97e4b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:30:51,000 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:30:51,004 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) [2024-10-24 00:30:51,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-24 00:30:51,010 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:30:51,010 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:30:51,010 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:30:51,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:30:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1419667615, now seen corresponding path program 1 times [2024-10-24 00:30:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:30:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651708245] [2024-10-24 00:30:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:30:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:51,140 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:30:51,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:51,151 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:30:51,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:30:51,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:30:51,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651708245] [2024-10-24 00:30:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651708245] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:30:51,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:30:51,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:30:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417854010] [2024-10-24 00:30:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:30:51,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:30:51,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:30:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:30:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:30:51,191 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) [2024-10-24 00:30:51,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:30:51,219 INFO L93 Difference]: Finished difference Result 40 states and 58 transitions. [2024-10-24 00:30:51,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:30:51,222 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 [2024-10-24 00:30:51,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:30:51,229 INFO L225 Difference]: With dead ends: 40 [2024-10-24 00:30:51,230 INFO L226 Difference]: Without dead ends: 19 [2024-10-24 00:30:51,235 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 [2024-10-24 00:30:51,239 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 [2024-10-24 00:30:51,241 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] [2024-10-24 00:30:51,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-10-24 00:30:51,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-10-24 00:30:51,280 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) [2024-10-24 00:30:51,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-10-24 00:30:51,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 17 [2024-10-24 00:30:51,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:30:51,284 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-10-24 00:30:51,284 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) [2024-10-24 00:30:51,285 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-10-24 00:30:51,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-24 00:30:51,286 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:30:51,286 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:30:51,287 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:30:51,287 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:30:51,288 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:30:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1758174245, now seen corresponding path program 1 times [2024-10-24 00:30:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:30:51,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071153979] [2024-10-24 00:30:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:51,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:30:51,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:30:51,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [44993744] [2024-10-24 00:30:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:30:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:30:51,336 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) [2024-10-24 00:30:51,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 00:30:51,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:51,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 00:30:51,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:30:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:30:51,524 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:30:51,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:30:51,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071153979] [2024-10-24 00:30:51,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:30:51,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44993744] [2024-10-24 00:30:51,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44993744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:30:51,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:30:51,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 00:30:51,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894455702] [2024-10-24 00:30:51,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:30:51,528 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:30:51,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:30:51,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:30:51,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 00:30:51,530 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) [2024-10-24 00:30:51,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:30:51,594 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-10-24 00:30:51,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:30:51,595 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 [2024-10-24 00:30:51,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:30:51,596 INFO L225 Difference]: With dead ends: 30 [2024-10-24 00:30:51,596 INFO L226 Difference]: Without dead ends: 26 [2024-10-24 00:30:51,597 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 [2024-10-24 00:30:51,598 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 [2024-10-24 00:30:51,598 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] [2024-10-24 00:30:51,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-10-24 00:30:51,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-10-24 00:30:51,604 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) [2024-10-24 00:30:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2024-10-24 00:30:51,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2024-10-24 00:30:51,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:30:51,606 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2024-10-24 00:30:51,606 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) [2024-10-24 00:30:51,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2024-10-24 00:30:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-10-24 00:30:51,607 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:30:51,607 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:30:51,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 00:30:51,807 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 [2024-10-24 00:30:51,808 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:30:51,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:30:51,808 INFO L85 PathProgramCache]: Analyzing trace with hash -795669560, now seen corresponding path program 1 times [2024-10-24 00:30:51,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:30:51,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904738882] [2024-10-24 00:30:51,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:51,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:30:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:30:51,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [176891691] [2024-10-24 00:30:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:51,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:30:51,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:30:51,844 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) [2024-10-24 00:30:51,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 00:30:51,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:51,909 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 00:30:51,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:30:51,988 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:30:51,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:30:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-24 00:30:52,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:30:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904738882] [2024-10-24 00:30:52,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:30:52,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176891691] [2024-10-24 00:30:52,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176891691] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-24 00:30:52,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:30:52,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-10-24 00:30:52,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525411743] [2024-10-24 00:30:52,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:30:52,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 00:30:52,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:30:52,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 00:30:52,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-10-24 00:30:52,115 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) [2024-10-24 00:30:52,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:30:52,169 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-10-24 00:30:52,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 00:30:52,169 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 [2024-10-24 00:30:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:30:52,170 INFO L225 Difference]: With dead ends: 32 [2024-10-24 00:30:52,171 INFO L226 Difference]: Without dead ends: 28 [2024-10-24 00:30:52,171 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 [2024-10-24 00:30:52,173 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 [2024-10-24 00:30:52,173 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] [2024-10-24 00:30:52,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-10-24 00:30:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-10-24 00:30:52,183 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) [2024-10-24 00:30:52,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2024-10-24 00:30:52,184 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2024-10-24 00:30:52,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:30:52,185 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2024-10-24 00:30:52,185 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) [2024-10-24 00:30:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2024-10-24 00:30:52,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-10-24 00:30:52,188 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:30:52,188 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] [2024-10-24 00:30:52,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 00:30:52,392 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 [2024-10-24 00:30:52,393 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:30:52,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:30:52,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1266135666, now seen corresponding path program 1 times [2024-10-24 00:30:52,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:30:52,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436429604] [2024-10-24 00:30:52,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:52,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:30:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:30:52,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718337995] [2024-10-24 00:30:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:52,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:30:52,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:30:52,431 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) [2024-10-24 00:30:52,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 00:30:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:52,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 00:30:52,513 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:30:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 00:30:52,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:30:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-24 00:30:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:30:53,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436429604] [2024-10-24 00:30:53,189 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:30:53,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718337995] [2024-10-24 00:30:53,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718337995] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:30:53,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:30:53,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2024-10-24 00:30:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415182521] [2024-10-24 00:30:53,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:30:53,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 00:30:53,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:30:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 00:30:53,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2024-10-24 00:30:53,195 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 00:30:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:30:53,675 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2024-10-24 00:30:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-24 00:30:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 35 [2024-10-24 00:30:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:30:53,676 INFO L225 Difference]: With dead ends: 49 [2024-10-24 00:30:53,677 INFO L226 Difference]: Without dead ends: 41 [2024-10-24 00:30:53,677 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-10-24 00:30:53,678 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-10-24 00:30:53,679 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 139 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-10-24 00:30:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-10-24 00:30:53,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-10-24 00:30:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-10-24 00:30:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2024-10-24 00:30:53,693 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 35 [2024-10-24 00:30:53,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:30:53,693 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2024-10-24 00:30:53,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 12 states have internal predecessors, (25), 9 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2024-10-24 00:30:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2024-10-24 00:30:53,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-10-24 00:30:53,695 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:30:53,695 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] [2024-10-24 00:30:53,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-10-24 00:30:53,895 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 [2024-10-24 00:30:53,896 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:30:53,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:30:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 459274687, now seen corresponding path program 2 times [2024-10-24 00:30:53,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:30:53,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914198009] [2024-10-24 00:30:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:30:53,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:30:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,244 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:30:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,276 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-10-24 00:30:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,284 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-10-24 00:30:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,300 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-10-24 00:30:54,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,315 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-10-24 00:30:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,322 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-10-24 00:30:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,336 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:30:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,342 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-10-24 00:30:54,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:30:54,348 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 33 proven. 12 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-24 00:30:54,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:30:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914198009] [2024-10-24 00:30:54,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914198009] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:30:54,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726608982] [2024-10-24 00:30:54,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:30:54,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:30:54,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:30:54,354 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) [2024-10-24 00:30:54,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 00:30:54,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:30:54,422 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:30:54,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 00:30:54,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:30:54,603 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 70 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-10-24 00:30:54,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:30:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 42 proven. 3 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-10-24 00:30:54,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726608982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:30:54,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:30:54,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2024-10-24 00:30:54,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875106216] [2024-10-24 00:30:54,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:30:54,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 00:30:54,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:30:54,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 00:30:54,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2024-10-24 00:30:54,759 INFO L87 Difference]: Start difference. First operand 41 states and 45 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) [2024-10-24 00:30:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:30:54,821 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2024-10-24 00:30:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 00:30:54,822 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 [2024-10-24 00:30:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:30:54,822 INFO L225 Difference]: With dead ends: 43 [2024-10-24 00:30:54,822 INFO L226 Difference]: Without dead ends: 0 [2024-10-24 00:30:54,823 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 [2024-10-24 00:30:54,824 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-24 00:30:54,824 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:30:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-24 00:30:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-24 00:30:54,828 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) [2024-10-24 00:30:54,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-24 00:30:54,829 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 56 [2024-10-24 00:30:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:30:54,829 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 00:30:54,829 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) [2024-10-24 00:30:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-24 00:30:54,829 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-24 00:30:54,833 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-24 00:30:54,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 00:30:55,034 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 [2024-10-24 00:30:55,037 INFO L407 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2024-10-24 00:30:55,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-24 00:30:55,156 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-24 00:30:55,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:30:55 BoogieIcfgContainer [2024-10-24 00:30:55,176 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-24 00:30:55,177 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-24 00:30:55,177 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-24 00:30:55,177 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-24 00:30:55,178 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:30:50" (3/4) ... [2024-10-24 00:30:55,180 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-24 00:30:55,183 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-10-24 00:30:55,183 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-24 00:30:55,188 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-10-24 00:30:55,188 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-24 00:30:55,189 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-24 00:30:55,189 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-24 00:30:55,278 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-24 00:30:55,278 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-24 00:30:55,278 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-24 00:30:55,279 INFO L158 Benchmark]: Toolchain (without parser) took 5128.09ms. Allocated memory was 188.7MB in the beginning and 274.7MB in the end (delta: 86.0MB). Free memory was 120.8MB in the beginning and 175.7MB in the end (delta: -54.8MB). Peak memory consumption was 31.6MB. Max. memory is 16.1GB. [2024-10-24 00:30:55,279 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 188.7MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 00:30:55,279 INFO L158 Benchmark]: CACSL2BoogieTranslator took 269.92ms. Allocated memory is still 188.7MB. Free memory was 120.6MB in the beginning and 108.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 00:30:55,280 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.43ms. Allocated memory is still 188.7MB. Free memory was 108.0MB in the beginning and 106.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 00:30:55,280 INFO L158 Benchmark]: Boogie Preprocessor took 28.67ms. Allocated memory is still 188.7MB. Free memory was 106.4MB in the beginning and 104.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 00:30:55,281 INFO L158 Benchmark]: RCFGBuilder took 432.43ms. Allocated memory is still 188.7MB. Free memory was 104.8MB in the beginning and 156.0MB in the end (delta: -51.2MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. [2024-10-24 00:30:55,282 INFO L158 Benchmark]: TraceAbstraction took 4261.22ms. Allocated memory was 188.7MB in the beginning and 274.7MB in the end (delta: 86.0MB). Free memory was 155.0MB in the beginning and 180.9MB in the end (delta: -26.0MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. [2024-10-24 00:30:55,282 INFO L158 Benchmark]: Witness Printer took 101.60ms. Allocated memory is still 274.7MB. Free memory was 180.9MB in the beginning and 175.7MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-24 00:30:55,283 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 188.7MB. Free memory is still 144.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 269.92ms. Allocated memory is still 188.7MB. Free memory was 120.6MB in the beginning and 108.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.43ms. Allocated memory is still 188.7MB. Free memory was 108.0MB in the beginning and 106.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 28.67ms. Allocated memory is still 188.7MB. Free memory was 106.4MB in the beginning and 104.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 432.43ms. Allocated memory is still 188.7MB. Free memory was 104.8MB in the beginning and 156.0MB in the end (delta: -51.2MB). Peak memory consumption was 13.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4261.22ms. Allocated memory was 188.7MB in the beginning and 274.7MB in the end (delta: 86.0MB). Free memory was 155.0MB in the beginning and 180.9MB in the end (delta: -26.0MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. * Witness Printer took 101.60ms. Allocated memory is still 274.7MB. Free memory was 180.9MB in the beginning and 175.7MB in the end (delta: 5.2MB). 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: 4.1s, OverallIterations: 5, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 357 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 273 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 207 IncrementalHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 84 mSDtfsCounter, 207 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 278 GetRequests, 230 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=41occurred in iteration=4, InterpolantAutomatonStates: 33, 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, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 311 ConstructedInterpolants, 0 QuantifiedInterpolants, 1281 SizeOfPredicates, 5 NumberOfNonLiveVariables, 368 ConjunctsInSsa, 54 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 360/392 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! [2024-10-24 00:30:55,307 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