./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/bresenham-ll_valuebound2.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/bresenham-ll_valuebound2.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 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 00:04:02,552 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 00:04:02,647 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-24 00:04:02,653 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 00:04:02,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 00:04:02,682 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 00:04:02,683 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 00:04:02,684 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 00:04:02,684 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 00:04:02,686 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 00:04:02,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 00:04:02,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 00:04:02,687 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 00:04:02,688 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 00:04:02,689 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 00:04:02,690 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 00:04:02,690 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-24 00:04:02,690 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 00:04:02,690 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 00:04:02,691 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 00:04:02,691 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 00:04:02,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-24 00:04:02,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 00:04:02,695 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-24 00:04:02,695 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 00:04:02,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 00:04:02,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-24 00:04:02,695 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 00:04:02,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 00:04:02,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 00:04:02,696 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 00:04:02,696 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 00:04:02,696 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:04:02,697 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 00:04:02,697 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 00:04:02,699 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-24 00:04:02,700 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 00:04:02,700 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 00:04:02,700 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 00:04:02,700 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 00:04:02,701 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 00:04:02,701 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 00:04:02,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72cd0a4215707a62376e213156123902caf611a87605e41064b672632b6ef1f9 [2024-10-24 00:04:02,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 00:04:02,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 00:04:02,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 00:04:03,000 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 00:04:03,001 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 00:04:03,002 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2024-10-24 00:04:04,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 00:04:04,626 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 00:04:04,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/bresenham-ll_valuebound2.c [2024-10-24 00:04:04,634 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6936b6e09/20f9e6d83d8447e4a80c2955c34aeefa/FLAG7beeba5be [2024-10-24 00:04:04,996 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6936b6e09/20f9e6d83d8447e4a80c2955c34aeefa [2024-10-24 00:04:04,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 00:04:04,999 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 00:04:05,004 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 00:04:05,004 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 00:04:05,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 00:04:05,011 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:04:04" (1/1) ... [2024-10-24 00:04:05,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad2a710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05, skipping insertion in model container [2024-10-24 00:04:05,012 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 12:04:04" (1/1) ... [2024-10-24 00:04:05,036 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 00:04:05,210 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/bresenham-ll_valuebound2.c[597,610] [2024-10-24 00:04:05,234 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:04:05,242 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 00:04:05,271 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/bresenham-ll_valuebound2.c[597,610] [2024-10-24 00:04:05,284 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 00:04:05,320 INFO L204 MainTranslator]: Completed translation [2024-10-24 00:04:05,323 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05 WrapperNode [2024-10-24 00:04:05,324 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 00:04:05,325 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 00:04:05,325 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 00:04:05,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 00:04:05,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,367 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2024-10-24 00:04:05,368 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 00:04:05,368 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 00:04:05,369 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 00:04:05,369 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 00:04:05,379 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,392 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 00:04:05,392 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,393 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,399 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,402 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,405 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,406 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 00:04:05,407 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 00:04:05,407 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 00:04:05,408 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 00:04:05,408 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (1/1) ... [2024-10-24 00:04:05,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 00:04:05,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:05,436 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 00:04:05,438 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 00:04:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 00:04:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-10-24 00:04:05,479 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-10-24 00:04:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 00:04:05,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 00:04:05,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 00:04:05,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-24 00:04:05,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-24 00:04:05,535 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 00:04:05,537 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 00:04:05,663 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-10-24 00:04:05,664 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 00:04:05,686 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 00:04:05,686 INFO L314 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-24 00:04:05,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:04:05 BoogieIcfgContainer [2024-10-24 00:04:05,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 00:04:05,689 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 00:04:05,689 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 00:04:05,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 00:04:05,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 12:04:04" (1/3) ... [2024-10-24 00:04:05,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325a008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:04:05, skipping insertion in model container [2024-10-24 00:04:05,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 12:04:05" (2/3) ... [2024-10-24 00:04:05,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4325a008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 12:04:05, skipping insertion in model container [2024-10-24 00:04:05,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:04:05" (3/3) ... [2024-10-24 00:04:05,700 INFO L112 eAbstractionObserver]: Analyzing ICFG bresenham-ll_valuebound2.c [2024-10-24 00:04:05,714 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 00:04:05,714 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-24 00:04:05,758 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 00:04:05,764 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;@9187c6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 00:04:05,764 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-24 00:04:05,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:04:05,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 00:04:05,775 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:05,775 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:05,776 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:05,780 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash 866122637, now seen corresponding path program 1 times [2024-10-24 00:04:05,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:05,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341548987] [2024-10-24 00:04:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:05,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:05,909 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:04:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:05,917 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:04:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:05,925 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 00:04:05,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:05,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341548987] [2024-10-24 00:04:05,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341548987] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:04:05,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:04:05,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 00:04:05,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768412991] [2024-10-24 00:04:05,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:04:05,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-24 00:04:05,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:05,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-24 00:04:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-24 00:04:05,951 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 00:04:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:05,975 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2024-10-24 00:04:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-24 00:04:05,978 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 18 [2024-10-24 00:04:05,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:05,983 INFO L225 Difference]: With dead ends: 46 [2024-10-24 00:04:05,983 INFO L226 Difference]: Without dead ends: 22 [2024-10-24 00:04:05,985 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 00:04:05,988 INFO L432 NwaCegarLoop]: 25 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, 25 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 00:04:05,989 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-24 00:04:06,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-10-24 00:04:06,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-10-24 00:04:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-24 00:04:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2024-10-24 00:04:06,015 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2024-10-24 00:04:06,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:06,016 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2024-10-24 00:04:06,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 00:04:06,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2024-10-24 00:04:06,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-10-24 00:04:06,017 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:06,017 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:06,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 00:04:06,018 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:06,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:06,018 INFO L85 PathProgramCache]: Analyzing trace with hash 266317329, now seen corresponding path program 1 times [2024-10-24 00:04:06,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:06,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163846255] [2024-10-24 00:04:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:06,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:04:06,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710926774] [2024-10-24 00:04:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:06,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:06,057 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 00:04:06,058 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 00:04:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:06,114 INFO L255 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:04:06,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:06,281 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 00:04:06,281 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:04:06,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:06,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163846255] [2024-10-24 00:04:06,282 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:04:06,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710926774] [2024-10-24 00:04:06,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710926774] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:04:06,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 00:04:06,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-24 00:04:06,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846705849] [2024-10-24 00:04:06,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:04:06,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:04:06,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:06,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:04:06,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:04:06,288 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 00:04:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:06,397 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-10-24 00:04:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:04:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 18 [2024-10-24 00:04:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:06,400 INFO L225 Difference]: With dead ends: 34 [2024-10-24 00:04:06,400 INFO L226 Difference]: Without dead ends: 32 [2024-10-24 00:04:06,400 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:04:06,401 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:06,402 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:04:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-24 00:04:06,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-10-24 00:04:06,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:04:06,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-10-24 00:04:06,410 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2024-10-24 00:04:06,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:06,411 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-10-24 00:04:06,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 00:04:06,412 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-10-24 00:04:06,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-10-24 00:04:06,413 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:06,413 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:06,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-24 00:04:06,617 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 00:04:06,618 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:06,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:06,619 INFO L85 PathProgramCache]: Analyzing trace with hash -125875189, now seen corresponding path program 1 times [2024-10-24 00:04:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743693314] [2024-10-24 00:04:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:06,873 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:04:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:06,915 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:04:06,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:06,928 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 00:04:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 00:04:06,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:06,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743693314] [2024-10-24 00:04:06,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743693314] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:04:06,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955964694] [2024-10-24 00:04:06,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:06,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:06,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:06,958 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 00:04:06,979 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 00:04:07,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:07,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 00:04:07,078 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:07,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:04:07,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 00:04:07,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955964694] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 00:04:07,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 00:04:07,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2024-10-24 00:04:07,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927265047] [2024-10-24 00:04:07,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 00:04:07,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:04:07,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:07,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:04:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-10-24 00:04:07,229 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 00:04:07,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:07,326 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2024-10-24 00:04:07,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 00:04:07,327 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 25 [2024-10-24 00:04:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:07,329 INFO L225 Difference]: With dead ends: 38 [2024-10-24 00:04:07,329 INFO L226 Difference]: Without dead ends: 30 [2024-10-24 00:04:07,329 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-10-24 00:04:07,330 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:07,331 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 70 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:04:07,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-24 00:04:07,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2024-10-24 00:04:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:04:07,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-10-24 00:04:07,338 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2024-10-24 00:04:07,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:07,338 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-10-24 00:04:07,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 3 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 00:04:07,339 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-10-24 00:04:07,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-10-24 00:04:07,339 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:07,339 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:07,356 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 00:04:07,543 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 00:04:07,544 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:07,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1056709002, now seen corresponding path program 1 times [2024-10-24 00:04:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635033635] [2024-10-24 00:04:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:07,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:04:07,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698854885] [2024-10-24 00:04:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:07,586 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 00:04:07,592 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 00:04:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:07,629 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-10-24 00:04:07,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-24 00:04:08,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:04:08,477 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 00:04:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635033635] [2024-10-24 00:04:08,478 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:04:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698854885] [2024-10-24 00:04:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698854885] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:04:08,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:04:08,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2024-10-24 00:04:08,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287737540] [2024-10-24 00:04:08,479 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:04:08,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-24 00:04:08,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-24 00:04:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-10-24 00:04:08,483 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 00:04:09,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:09,077 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2024-10-24 00:04:09,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-10-24 00:04:09,078 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2024-10-24 00:04:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:09,079 INFO L225 Difference]: With dead ends: 60 [2024-10-24 00:04:09,079 INFO L226 Difference]: Without dead ends: 32 [2024-10-24 00:04:09,080 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2024-10-24 00:04:09,081 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:09,082 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 101 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-24 00:04:09,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-10-24 00:04:09,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-10-24 00:04:09,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-10-24 00:04:09,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2024-10-24 00:04:09,089 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2024-10-24 00:04:09,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:09,089 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2024-10-24 00:04:09,089 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 20 states have internal predecessors, (31), 6 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2024-10-24 00:04:09,089 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2024-10-24 00:04:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-10-24 00:04:09,090 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:09,090 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:09,107 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 00:04:09,294 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 00:04:09,295 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:09,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:09,296 INFO L85 PathProgramCache]: Analyzing trace with hash 2017352516, now seen corresponding path program 1 times [2024-10-24 00:04:09,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:09,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669551081] [2024-10-24 00:04:09,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:09,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-24 00:04:09,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [666687271] [2024-10-24 00:04:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:09,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:09,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:09,330 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 00:04:09,334 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 00:04:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:09,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-10-24 00:04:09,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 00:04:09,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:04:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-24 00:04:10,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669551081] [2024-10-24 00:04:10,179 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-10-24 00:04:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666687271] [2024-10-24 00:04:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666687271] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:04:10,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 00:04:10,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2024-10-24 00:04:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112420515] [2024-10-24 00:04:10,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 00:04:10,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-24 00:04:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-24 00:04:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-10-24 00:04:10,186 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 25 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-24 00:04:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:11,652 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2024-10-24 00:04:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 00:04:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 34 [2024-10-24 00:04:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:11,653 INFO L225 Difference]: With dead ends: 50 [2024-10-24 00:04:11,653 INFO L226 Difference]: Without dead ends: 42 [2024-10-24 00:04:11,654 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=1156, Unknown=0, NotChecked=0, Total=1406 [2024-10-24 00:04:11,655 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:11,655 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 144 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-10-24 00:04:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-10-24 00:04:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2024-10-24 00:04:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-10-24 00:04:11,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-10-24 00:04:11,664 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 34 [2024-10-24 00:04:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:11,664 INFO L471 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-10-24 00:04:11,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 7 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-10-24 00:04:11,665 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-10-24 00:04:11,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-24 00:04:11,666 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:11,666 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:11,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-10-24 00:04:11,870 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 00:04:11,871 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:11,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 233089380, now seen corresponding path program 1 times [2024-10-24 00:04:11,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:11,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112370339] [2024-10-24 00:04:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:11,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,950 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:04:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,957 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:04:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,961 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 00:04:11,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,965 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:04:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,969 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:04:11,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,972 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:04:11,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:04:11,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112370339] [2024-10-24 00:04:11,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112370339] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:04:11,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578813083] [2024-10-24 00:04:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:11,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:11,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:11,977 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:04:11,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 00:04:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 00:04:12,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-10-24 00:04:12,064 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:04:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:04:12,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578813083] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:04:12,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:04:12,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-10-24 00:04:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777874568] [2024-10-24 00:04:12,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:04:12,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 00:04:12,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 00:04:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-10-24 00:04:12,140 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 00:04:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:12,218 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2024-10-24 00:04:12,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 00:04:12,220 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 52 [2024-10-24 00:04:12,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:12,221 INFO L225 Difference]: With dead ends: 76 [2024-10-24 00:04:12,223 INFO L226 Difference]: Without dead ends: 57 [2024-10-24 00:04:12,223 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-24 00:04:12,224 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:12,224 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 98 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-24 00:04:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-10-24 00:04:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2024-10-24 00:04:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-10-24 00:04:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2024-10-24 00:04:12,262 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 52 [2024-10-24 00:04:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:12,263 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2024-10-24 00:04:12,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-10-24 00:04:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2024-10-24 00:04:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-10-24 00:04:12,264 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:12,264 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:12,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-24 00:04:12,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:12,469 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:12,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:12,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1572348954, now seen corresponding path program 2 times [2024-10-24 00:04:12,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:12,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022927319] [2024-10-24 00:04:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:12,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,679 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:04:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,684 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:04:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,686 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 00:04:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,695 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:04:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,701 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:04:12,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,715 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:04:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:04:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022927319] [2024-10-24 00:04:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022927319] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:04:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384602320] [2024-10-24 00:04:12,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 00:04:12,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:12,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:12,727 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:04:12,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 00:04:12,780 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 00:04:12,781 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:04:12,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 00:04:12,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:04:12,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:04:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-10-24 00:04:13,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384602320] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:04:13,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:04:13,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2024-10-24 00:04:13,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037569163] [2024-10-24 00:04:13,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:04:13,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-10-24 00:04:13,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:13,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-10-24 00:04:13,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2024-10-24 00:04:13,243 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-24 00:04:13,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:13,841 INFO L93 Difference]: Finished difference Result 80 states and 96 transitions. [2024-10-24 00:04:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 00:04:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 52 [2024-10-24 00:04:13,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:13,842 INFO L225 Difference]: With dead ends: 80 [2024-10-24 00:04:13,842 INFO L226 Difference]: Without dead ends: 74 [2024-10-24 00:04:13,843 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=1195, Unknown=0, NotChecked=0, Total=1482 [2024-10-24 00:04:13,844 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:13,844 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 155 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-24 00:04:13,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-10-24 00:04:13,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2024-10-24 00:04:13,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-10-24 00:04:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2024-10-24 00:04:13,869 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 52 [2024-10-24 00:04:13,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:13,870 INFO L471 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2024-10-24 00:04:13,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 states have internal predecessors, (57), 14 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2024-10-24 00:04:13,870 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2024-10-24 00:04:13,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-10-24 00:04:13,872 INFO L207 NwaCegarLoop]: Found error trace [2024-10-24 00:04:13,873 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 00:04:13,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-10-24 00:04:14,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:14,074 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-24 00:04:14,074 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 00:04:14,074 INFO L85 PathProgramCache]: Analyzing trace with hash 281121103, now seen corresponding path program 3 times [2024-10-24 00:04:14,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 00:04:14,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233152760] [2024-10-24 00:04:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 00:04:14,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 00:04:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,458 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-10-24 00:04:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,461 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-10-24 00:04:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,463 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-10-24 00:04:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,474 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-10-24 00:04:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,486 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-10-24 00:04:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,501 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-10-24 00:04:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,512 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-10-24 00:04:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 00:04:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-10-24 00:04:14,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 00:04:14,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233152760] [2024-10-24 00:04:14,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233152760] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 00:04:14,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852507319] [2024-10-24 00:04:14,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 00:04:14,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:14,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 00:04:14,527 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-24 00:04:14,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 00:04:14,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-10-24 00:04:14,579 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 00:04:14,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-10-24 00:04:14,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 00:04:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-24 00:04:15,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 00:04:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 39 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-10-24 00:04:29,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852507319] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 00:04:29,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 00:04:29,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 35 [2024-10-24 00:04:29,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643028869] [2024-10-24 00:04:29,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 00:04:29,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 00:04:29,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 00:04:29,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 00:04:29,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1058, Unknown=2, NotChecked=0, Total=1190 [2024-10-24 00:04:29,267 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 35 states, 31 states have (on average 2.129032258064516) internal successors, (66), 32 states have internal predecessors, (66), 13 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-10-24 00:04:38,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2024-10-24 00:04:41,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-24 00:04:41,694 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-10-24 00:04:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-10-24 00:04:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.129032258064516) internal successors, (66), 32 states have internal predecessors, (66), 13 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 61 [2024-10-24 00:04:41,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-24 00:04:41,695 INFO L225 Difference]: With dead ends: 89 [2024-10-24 00:04:41,695 INFO L226 Difference]: Without dead ends: 0 [2024-10-24 00:04:41,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=559, Invalid=3471, Unknown=2, NotChecked=0, Total=4032 [2024-10-24 00:04:41,699 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 34 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2024-10-24 00:04:41,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 258 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 805 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2024-10-24 00:04:41,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-10-24 00:04:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-10-24 00:04:41,700 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 00:04:41,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-10-24 00:04:41,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2024-10-24 00:04:41,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-24 00:04:41,700 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-10-24 00:04:41,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.129032258064516) internal successors, (66), 32 states have internal predecessors, (66), 13 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-10-24 00:04:41,700 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-10-24 00:04:41,700 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-10-24 00:04:41,705 INFO L782 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-24 00:04:41,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-10-24 00:04:41,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 00:04:41,909 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2024-10-24 00:04:41,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-10-24 00:04:43,285 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-10-24 00:04:43,299 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-10-24 00:04:43,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 12:04:43 BoogieIcfgContainer [2024-10-24 00:04:43,308 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-24 00:04:43,309 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-10-24 00:04:43,309 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-10-24 00:04:43,309 INFO L274 PluginConnector]: Witness Printer initialized [2024-10-24 00:04:43,309 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 12:04:05" (3/4) ... [2024-10-24 00:04:43,312 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-10-24 00:04:43,315 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-10-24 00:04:43,315 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-10-24 00:04:43,319 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-10-24 00:04:43,319 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-10-24 00:04:43,319 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-10-24 00:04:43,319 INFO L925 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-10-24 00:04:43,409 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-10-24 00:04:43,410 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-10-24 00:04:43,410 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-10-24 00:04:43,410 INFO L158 Benchmark]: Toolchain (without parser) took 38411.20ms. Allocated memory was 188.7MB in the beginning and 276.8MB in the end (delta: 88.1MB). Free memory was 131.4MB in the beginning and 88.5MB in the end (delta: 42.9MB). Peak memory consumption was 132.0MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,410 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 00:04:43,411 INFO L158 Benchmark]: CACSL2BoogieTranslator took 320.40ms. Allocated memory is still 188.7MB. Free memory was 130.8MB in the beginning and 158.9MB in the end (delta: -28.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,411 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.69ms. Allocated memory is still 188.7MB. Free memory was 158.9MB in the beginning and 157.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 00:04:43,411 INFO L158 Benchmark]: Boogie Preprocessor took 38.09ms. Allocated memory is still 188.7MB. Free memory was 157.3MB in the beginning and 155.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,411 INFO L158 Benchmark]: RCFGBuilder took 279.79ms. Allocated memory is still 188.7MB. Free memory was 155.1MB in the beginning and 143.4MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,411 INFO L158 Benchmark]: TraceAbstraction took 37619.30ms. Allocated memory was 188.7MB in the beginning and 276.8MB in the end (delta: 88.1MB). Free memory was 142.6MB in the beginning and 92.7MB in the end (delta: 49.9MB). Peak memory consumption was 140.6MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,412 INFO L158 Benchmark]: Witness Printer took 101.20ms. Allocated memory is still 276.8MB. Free memory was 92.7MB in the beginning and 88.5MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-10-24 00:04:43,413 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 100.7MB. Free memory is still 54.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 320.40ms. Allocated memory is still 188.7MB. Free memory was 130.8MB in the beginning and 158.9MB in the end (delta: -28.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.69ms. Allocated memory is still 188.7MB. Free memory was 158.9MB in the beginning and 157.3MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.09ms. Allocated memory is still 188.7MB. Free memory was 157.3MB in the beginning and 155.1MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 279.79ms. Allocated memory is still 188.7MB. Free memory was 155.1MB in the beginning and 143.4MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 37619.30ms. Allocated memory was 188.7MB in the beginning and 276.8MB in the end (delta: 88.1MB). Free memory was 142.6MB in the beginning and 92.7MB in the end (delta: 49.9MB). Peak memory consumption was 140.6MB. Max. memory is 16.1GB. * Witness Printer took 101.20ms. Allocated memory is still 276.8MB. Free memory was 92.7MB in the beginning and 88.5MB 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.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 36.2s, OverallIterations: 8, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 15.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 141 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 137 mSDsluCounter, 921 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 780 mSDsCounter, 110 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1807 IncrementalHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 110 mSolverCounterUnsat, 141 mSDtfsCounter, 1807 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 641 GetRequests, 454 SyntacticMatches, 3 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1507 ImplicationChecksByTransitivity, 21.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=7, InterpolantAutomatonStates: 129, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 18.3s InterpolantComputationTime, 556 NumberOfCodeBlocks, 529 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 686 ConstructedInterpolants, 3 QuantifiedInterpolants, 4234 SizeOfPredicates, 24 NumberOfNonLiveVariables, 683 ConjunctsInSsa, 151 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 543/714 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: 32]: Loop Invariant Derived loop invariant: ((((((((((__int128) X * y) * 2) + X) + v) == ((((__int128) Y * x) * 2) + ((long long) 2 * Y))) && (X <= 2)) && (0 <= Y)) && (Y <= 2)) && (0 <= X)) - ProcedureContractResult [Line: 10]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (cond != 0) - ProcedureContractResult [Line: 13]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (1 <= cond) Ensures: (1 <= cond) RESULT: Ultimate proved your program to be correct! [2024-10-24 00:04:43,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE