/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --cacsl2boogietranslator.allow.undefined.functions true --traceabstraction.smt.solver External_ModelsAndUnsatCoreMode --traceabstraction.command.for.external.solver 'cvc4 --incremental --print-success --lang smt' -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_s1269b_p1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-b75d321-m [2024-11-04 22:53:19,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-04 22:53:19,654 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Bitvector.epf [2024-11-04 22:53:19,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-04 22:53:19,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-04 22:53:19,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-04 22:53:19,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-04 22:53:19,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-04 22:53:19,691 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-04 22:53:19,695 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-04 22:53:19,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-04 22:53:19,695 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-04 22:53:19,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-04 22:53:19,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-04 22:53:19,696 INFO L153 SettingsManager]: * Use SBE=true [2024-11-04 22:53:19,696 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-04 22:53:19,697 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-04 22:53:19,697 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-04 22:53:19,698 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-04 22:53:19,698 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-04 22:53:19,698 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-04 22:53:19,699 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-04 22:53:19,699 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-04 22:53:19,699 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-04 22:53:19,699 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-04 22:53:19,700 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-04 22:53:19,700 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-04 22:53:19,700 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-04 22:53:19,700 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-04 22:53:19,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-04 22:53:19,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-04 22:53:19,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 22:53:19,701 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-04 22:53:19,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-04 22:53:19,702 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-04 22:53:19,703 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-11-04 22:53:19,703 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:19,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-04 22:53:19,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-04 22:53:19,704 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-04 22:53:19,704 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-04 22:53:19,704 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Command for external solver -> cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:19,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-04 22:53:19,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-04 22:53:19,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-04 22:53:19,966 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-04 22:53:19,966 INFO L274 PluginConnector]: CDTParser initialized [2024-11-04 22:53:19,967 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_s1269b_p1.c [2024-11-04 22:53:21,384 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-04 22:53:21,636 INFO L384 CDTParser]: Found 1 translation units. [2024-11-04 22:53:21,637 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_s1269b_p1.c [2024-11-04 22:53:21,649 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625647817/5fad2bfbc20e4c71bee4de15791af5bd/FLAG9972be10c [2024-11-04 22:53:21,667 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/625647817/5fad2bfbc20e4c71bee4de15791af5bd [2024-11-04 22:53:21,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-04 22:53:21,672 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-11-04 22:53:21,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-04 22:53:21,676 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-04 22:53:21,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-04 22:53:21,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:53:21" (1/1) ... [2024-11-04 22:53:21,682 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1417a112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:21, skipping insertion in model container [2024-11-04 22:53:21,682 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.11 10:53:21" (1/1) ... [2024-11-04 22:53:21,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-04 22:53:21,927 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_s1269b_p1.c[1259,1272] [2024-11-04 22:53:22,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 22:53:22,118 INFO L200 MainTranslator]: Completed pre-run [2024-11-04 22:53:22,132 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_s1269b_p1.c[1259,1272] [2024-11-04 22:53:22,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-04 22:53:22,242 INFO L204 MainTranslator]: Completed translation [2024-11-04 22:53:22,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22 WrapperNode [2024-11-04 22:53:22,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-04 22:53:22,244 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-04 22:53:22,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-04 22:53:22,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-04 22:53:22,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,276 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,343 INFO L138 Inliner]: procedures = 17, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 840 [2024-11-04 22:53:22,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-04 22:53:22,344 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-04 22:53:22,344 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-04 22:53:22,345 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-04 22:53:22,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,369 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,394 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]. [2024-11-04 22:53:22,394 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,395 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,414 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,422 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,430 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,437 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,455 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-04 22:53:22,456 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-04 22:53:22,456 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-04 22:53:22,461 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-04 22:53:22,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (1/1) ... [2024-11-04 22:53:22,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-04 22:53:22,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-04 22:53:22,498 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) [2024-11-04 22:53:22,507 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 [2024-11-04 22:53:22,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-04 22:53:22,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-11-04 22:53:22,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-04 22:53:22,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-04 22:53:22,776 INFO L238 CfgBuilder]: Building ICFG [2024-11-04 22:53:22,778 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-04 22:53:23,996 INFO L? ?]: Removed 63 outVars from TransFormulas that were not future-live. [2024-11-04 22:53:23,997 INFO L287 CfgBuilder]: Performing block encoding [2024-11-04 22:53:24,010 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-04 22:53:24,011 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-04 22:53:24,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:53:24 BoogieIcfgContainer [2024-11-04 22:53:24,012 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-04 22:53:24,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-04 22:53:24,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-04 22:53:24,018 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-04 22:53:24,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.11 10:53:21" (1/3) ... [2024-11-04 22:53:24,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25665932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:53:24, skipping insertion in model container [2024-11-04 22:53:24,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.11 10:53:22" (2/3) ... [2024-11-04 22:53:24,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25665932 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.11 10:53:24, skipping insertion in model container [2024-11-04 22:53:24,020 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.11 10:53:24" (3/3) ... [2024-11-04 22:53:24,021 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_s1269b_p1.c [2024-11-04 22:53:24,036 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-04 22:53:24,037 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-04 22:53:24,096 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-04 22:53:24,103 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;@4edf58b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-04 22:53:24,104 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-04 22:53:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) [2024-11-04 22:53:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-04 22:53:24,113 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 22:53:24,114 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-04 22:53:24,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 22:53:24,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 22:53:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash 28694789, now seen corresponding path program 1 times [2024-11-04 22:53:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 22:53:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917058461] [2024-11-04 22:53:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 22:53:24,130 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:24,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 22:53:24,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 22:53:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-04 22:53:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 22:53:24,511 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-04 22:53:24,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 22:53:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:24,648 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 22:53:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:24,726 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 22:53:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917058461] [2024-11-04 22:53:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1917058461] provided 2 perfect and 0 imperfect interpolant sequences [2024-11-04 22:53:24,727 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-11-04 22:53:24,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2024-11-04 22:53:24,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511647453] [2024-11-04 22:53:24,730 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-11-04 22:53:24,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-04 22:53:24,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 22:53:24,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-04 22:53:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-04 22:53:24,755 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 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) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-04 22:53:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 22:53:24,832 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2024-11-04 22:53:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 22:53:24,836 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) Word has length 5 [2024-11-04 22:53:24,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 22:53:24,842 INFO L225 Difference]: With dead ends: 18 [2024-11-04 22:53:24,842 INFO L226 Difference]: Without dead ends: 10 [2024-11-04 22:53:24,845 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-04 22:53:24,848 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 22:53:24,849 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 22:53:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-04 22:53:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2024-11-04 22:53:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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) [2024-11-04 22:53:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2024-11-04 22:53:24,878 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2024-11-04 22:53:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 22:53:24,878 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2024-11-04 22:53:24,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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) [2024-11-04 22:53:24,879 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2024-11-04 22:53:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-04 22:53:24,879 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 22:53:24,880 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-04 22:53:24,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-04 22:53:25,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:25,084 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 22:53:25,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 22:53:25,085 INFO L85 PathProgramCache]: Analyzing trace with hash 152739811, now seen corresponding path program 1 times [2024-11-04 22:53:25,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 22:53:25,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918017284] [2024-11-04 22:53:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 22:53:25,085 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:25,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 22:53:25,087 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 22:53:25,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-04 22:53:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 22:53:25,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-04 22:53:25,549 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 22:53:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:25,661 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 22:53:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:25,868 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 22:53:25,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918017284] [2024-11-04 22:53:25,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [918017284] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 22:53:25,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 22:53:25,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2024-11-04 22:53:25,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204376006] [2024-11-04 22:53:25,869 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 22:53:25,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-04 22:53:25,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 22:53:25,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-04 22:53:25,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-04 22:53:25,872 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2024-11-04 22:53:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 22:53:26,011 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2024-11-04 22:53:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-04 22:53:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) Word has length 8 [2024-11-04 22:53:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 22:53:26,012 INFO L225 Difference]: With dead ends: 15 [2024-11-04 22:53:26,012 INFO L226 Difference]: Without dead ends: 13 [2024-11-04 22:53:26,013 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-11-04 22:53:26,014 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 22:53:26,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 22:53:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-04 22:53:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2024-11-04 22:53:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2024-11-04 22:53:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-11-04 22:53:26,019 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 8 [2024-11-04 22:53:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 22:53:26,019 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-11-04 22:53:26,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 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) [2024-11-04 22:53:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-11-04 22:53:26,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-04 22:53:26,020 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 22:53:26,020 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2024-11-04 22:53:26,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2024-11-04 22:53:26,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:26,221 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 22:53:26,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 22:53:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1906115653, now seen corresponding path program 2 times [2024-11-04 22:53:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 22:53:26,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035366302] [2024-11-04 22:53:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 22:53:26,222 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:26,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 22:53:26,225 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 22:53:26,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-04 22:53:26,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 22:53:26,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-04 22:53:26,865 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 22:53:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:27,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 22:53:28,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-04 22:53:28,029 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 22:53:28,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035366302] [2024-11-04 22:53:28,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035366302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-04 22:53:28,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-04 22:53:28,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2024-11-04 22:53:28,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959950323] [2024-11-04 22:53:28,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-04 22:53:28,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-04 22:53:28,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 22:53:28,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-04 22:53:28,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-11-04 22:53:28,032 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2024-11-04 22:53:28,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 22:53:28,385 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-11-04 22:53:28,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-04 22:53:28,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) Word has length 11 [2024-11-04 22:53:28,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 22:53:28,387 INFO L225 Difference]: With dead ends: 21 [2024-11-04 22:53:28,387 INFO L226 Difference]: Without dead ends: 19 [2024-11-04 22:53:28,388 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-04 22:53:28,389 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-04 22:53:28,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-04 22:53:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-04 22:53:28,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2024-11-04 22:53:28,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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) [2024-11-04 22:53:28,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2024-11-04 22:53:28,395 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2024-11-04 22:53:28,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 22:53:28,395 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2024-11-04 22:53:28,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 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) [2024-11-04 22:53:28,396 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2024-11-04 22:53:28,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-04 22:53:28,396 INFO L207 NwaCegarLoop]: Found error trace [2024-11-04 22:53:28,396 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1] [2024-11-04 22:53:28,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-04 22:53:28,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:28,601 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-04 22:53:28,602 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-04 22:53:28,602 INFO L85 PathProgramCache]: Analyzing trace with hash -37306491, now seen corresponding path program 3 times [2024-11-04 22:53:28,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-11-04 22:53:28,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090184123] [2024-11-04 22:53:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-04 22:53:28,602 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:28,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2024-11-04 22:53:28,604 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-04 22:53:28,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-04 22:53:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-04 22:53:29,523 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-04 22:53:29,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-04 22:53:29,680 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-04 22:53:29,680 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-04 22:53:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-04 22:53:29,767 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-11-04 22:53:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090184123] [2024-11-04 22:53:29,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090184123] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-04 22:53:29,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-04 22:53:29,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-04 22:53:29,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935712187] [2024-11-04 22:53:29,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-04 22:53:29,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-04 22:53:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-11-04 22:53:29,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-04 22:53:29,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-04 22:53:29,772 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-04 22:53:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-04 22:53:29,864 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2024-11-04 22:53:29,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-04 22:53:29,866 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) Word has length 17 [2024-11-04 22:53:29,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-04 22:53:29,866 INFO L225 Difference]: With dead ends: 18 [2024-11-04 22:53:29,866 INFO L226 Difference]: Without dead ends: 0 [2024-11-04 22:53:29,867 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-04 22:53:29,869 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-04 22:53:29,869 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 9 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-04 22:53:29,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-11-04 22:53:29,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-11-04 22:53:29,870 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) [2024-11-04 22:53:29,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-11-04 22:53:29,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2024-11-04 22:53:29,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-04 22:53:29,870 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-11-04 22:53:29,870 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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) [2024-11-04 22:53:29,871 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-11-04 22:53:29,871 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-11-04 22:53:29,875 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-11-04 22:53:29,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-04 22:53:30,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2024-11-04 22:53:30,079 INFO L407 BasicCegarLoop]: Path program histogram: [3, 1] [2024-11-04 22:53:30,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-11-04 22:53:30,183 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-11-04 22:53:30,201 WARN L976 BoogieBacktranslator]: Unfinished Backtranslation: Expression type not yet supported in backtranslation: QuantifierExpression [2024-11-04 22:53:30,203 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.11 10:53:30 BoogieIcfgContainer [2024-11-04 22:53:30,203 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-11-04 22:53:30,204 INFO L158 Benchmark]: Toolchain (without parser) took 8531.50ms. Allocated memory was 336.6MB in the beginning and 484.4MB in the end (delta: 147.8MB). Free memory was 276.7MB in the beginning and 410.9MB in the end (delta: -134.2MB). Peak memory consumption was 14.2MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,204 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory was 136.5MB in the beginning and 136.3MB in the end (delta: 180.4kB). There was no memory consumed. Max. memory is 8.0GB. [2024-11-04 22:53:30,204 INFO L158 Benchmark]: CACSL2BoogieTranslator took 567.33ms. Allocated memory is still 336.6MB. Free memory was 276.7MB in the beginning and 242.1MB in the end (delta: 34.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,204 INFO L158 Benchmark]: Boogie Procedure Inliner took 100.20ms. Allocated memory is still 336.6MB. Free memory was 242.1MB in the beginning and 235.3MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,205 INFO L158 Benchmark]: Boogie Preprocessor took 110.74ms. Allocated memory is still 336.6MB. Free memory was 235.3MB in the beginning and 227.4MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,205 INFO L158 Benchmark]: RCFGBuilder took 1556.19ms. Allocated memory is still 336.6MB. Free memory was 227.4MB in the beginning and 274.8MB in the end (delta: -47.4MB). Peak memory consumption was 117.2MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,205 INFO L158 Benchmark]: TraceAbstraction took 6188.24ms. Allocated memory was 336.6MB in the beginning and 484.4MB in the end (delta: 147.8MB). Free memory was 274.3MB in the beginning and 410.9MB in the end (delta: -136.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. [2024-11-04 22:53:30,206 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 188.7MB. Free memory was 136.5MB in the beginning and 136.3MB in the end (delta: 180.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 567.33ms. Allocated memory is still 336.6MB. Free memory was 276.7MB in the beginning and 242.1MB in the end (delta: 34.6MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 100.20ms. Allocated memory is still 336.6MB. Free memory was 242.1MB in the beginning and 235.3MB in the end (delta: 6.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 110.74ms. Allocated memory is still 336.6MB. Free memory was 235.3MB in the beginning and 227.4MB in the end (delta: 7.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * RCFGBuilder took 1556.19ms. Allocated memory is still 336.6MB. Free memory was 227.4MB in the beginning and 274.8MB in the end (delta: -47.4MB). Peak memory consumption was 117.2MB. Max. memory is 8.0GB. * TraceAbstraction took 6188.24ms. Allocated memory was 336.6MB in the beginning and 484.4MB in the end (delta: 147.8MB). Free memory was 274.3MB in the beginning and 410.9MB in the end (delta: -136.6MB). Peak memory consumption was 11.2MB. Max. memory is 8.0GB. * 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: 21]: 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 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.0s, OverallIterations: 4, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 59 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 41 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 67 IncrementalHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 18 mSDtfsCounter, 67 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 74 ConstructedInterpolants, 15 QuantifiedInterpolants, 3510 SizeOfPredicates, 22 NumberOfNonLiveVariables, 648 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 48/70 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: 120]: Loop Invariant Derived loop invariant: null RESULT: Ultimate proved your program to be correct! [2024-11-04 22:53:30,243 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...