/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 Internal_SMTInterpol -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -i ../../../trunk/examples/svcomp/bitvector/gcd_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.5-dev-356b6ba-m [2024-10-31 15:02:51,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 15:02:51,329 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2024-10-31 15:02:51,356 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 15:02:51,357 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 15:02:51,358 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 15:02:51,358 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 15:02:51,359 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 15:02:51,359 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 15:02:51,360 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 15:02:51,360 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 15:02:51,360 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 15:02:51,360 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-31 15:02:51,361 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 15:02:51,361 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 15:02:51,361 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 15:02:51,361 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-31 15:02:51,361 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 15:02:51,362 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-31 15:02:51,362 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 15:02:51,365 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-31 15:02:51,365 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 15:02:51,365 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 15:02:51,366 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 15:02:51,366 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:02:51,367 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-31 15:02:51,367 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 15:02:51,368 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 15:02:51,368 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 15:02:51,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 15:02:51,368 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-31 15:02:51,369 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Allow undefined functions -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol [2024-10-31 15:02:51,610 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 15:02:51,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 15:02:51,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 15:02:51,628 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 15:02:51,628 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 15:02:51,629 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/gcd_3.c [2024-10-31 15:02:52,760 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 15:02:52,915 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 15:02:52,916 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_3.c [2024-10-31 15:02:52,922 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028d9019e/80e8cf0a5f294072a81f4e3d3d131667/FLAG0d21f7e96 [2024-10-31 15:02:53,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/028d9019e/80e8cf0a5f294072a81f4e3d3d131667 [2024-10-31 15:02:53,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 15:02:53,325 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-10-31 15:02:53,326 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 15:02:53,326 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 15:02:53,329 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 15:02:53,330 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1af7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53, skipping insertion in model container [2024-10-31 15:02:53,330 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,345 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 15:02:53,466 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_3.c[664,677] [2024-10-31 15:02:53,482 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:02:53,493 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 15:02:53,503 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector/gcd_3.c[664,677] [2024-10-31 15:02:53,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 15:02:53,524 INFO L204 MainTranslator]: Completed translation [2024-10-31 15:02:53,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53 WrapperNode [2024-10-31 15:02:53,524 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 15:02:53,525 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 15:02:53,525 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 15:02:53,525 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 15:02:53,530 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,535 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,550 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2024-10-31 15:02:53,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 15:02:53,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 15:02:53,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 15:02:53,551 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 15:02:53,559 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,559 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,563 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,573 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-10-31 15:02:53,574 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,574 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,576 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,578 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,579 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,579 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 15:02:53,581 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 15:02:53,581 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 15:02:53,581 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 15:02:53,582 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (1/1) ... [2024-10-31 15:02:53,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 15:02:53,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-31 15:02:53,605 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) [2024-10-31 15:02:53,608 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 [2024-10-31 15:02:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 15:02:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-31 15:02:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-31 15:02:53,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 15:02:53,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 15:02:53,689 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 15:02:53,693 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 15:02:53,808 INFO L? ?]: Removed 15 outVars from TransFormulas that were not future-live. [2024-10-31 15:02:53,809 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 15:02:53,817 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 15:02:53,817 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-10-31 15:02:53,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:02:53 BoogieIcfgContainer [2024-10-31 15:02:53,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 15:02:53,819 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 15:02:53,819 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 15:02:53,822 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 15:02:53,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 03:02:53" (1/3) ... [2024-10-31 15:02:53,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2cbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:02:53, skipping insertion in model container [2024-10-31 15:02:53,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 03:02:53" (2/3) ... [2024-10-31 15:02:53,823 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e2cbe1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 03:02:53, skipping insertion in model container [2024-10-31 15:02:53,823 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 03:02:53" (3/3) ... [2024-10-31 15:02:53,824 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_3.c [2024-10-31 15:02:53,834 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 15:02:53,834 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-31 15:02:53,867 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 15:02:53,872 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;@152afdf8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 15:02:53,872 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-31 15:02:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-10-31 15:02:53,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-10-31 15:02:53,881 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:53,882 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:02:53,883 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:53,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:53,886 INFO L85 PathProgramCache]: Analyzing trace with hash 777289588, now seen corresponding path program 1 times [2024-10-31 15:02:53,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:53,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [198705273] [2024-10-31 15:02:53,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:53,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:54,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 15:02:54,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 15:02:54,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 15:02:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:54,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 15:02:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 15:02:54,449 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2024-10-31 15:02:54,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [198705273] [2024-10-31 15:02:54,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [198705273] provided 2 perfect and 0 imperfect interpolant sequences [2024-10-31 15:02:54,449 INFO L185 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2024-10-31 15:02:54,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 11 [2024-10-31 15:02:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086243126] [2024-10-31 15:02:54,451 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2024-10-31 15:02:54,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 15:02:54,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2024-10-31 15:02:54,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 15:02:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-10-31 15:02:54,474 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2024-10-31 15:02:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-31 15:02:54,696 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2024-10-31 15:02:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 15:02:54,699 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) Word has length 10 [2024-10-31 15:02:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-31 15:02:54,705 INFO L225 Difference]: With dead ends: 43 [2024-10-31 15:02:54,705 INFO L226 Difference]: Without dead ends: 18 [2024-10-31 15:02:54,709 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2024-10-31 15:02:54,713 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-31 15:02:54,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 76 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-31 15:02:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-31 15:02:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2024-10-31 15:02:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2024-10-31 15:02:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-10-31 15:02:54,736 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 10 [2024-10-31 15:02:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-31 15:02:54,737 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-10-31 15:02:54,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 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) [2024-10-31 15:02:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-10-31 15:02:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-10-31 15:02:54,737 INFO L207 NwaCegarLoop]: Found error trace [2024-10-31 15:02:54,737 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 15:02:54,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 15:02:54,738 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-31 15:02:54,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 15:02:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash 607524954, now seen corresponding path program 1 times [2024-10-31 15:02:54,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2024-10-31 15:02:54,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841835828] [2024-10-31 15:02:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 15:02:54,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 15:02:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-10-31 15:02:55,016 WARN L124 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2024-10-31 15:02:55,016 INFO L325 BasicCegarLoop]: Counterexample might be feasible [2024-10-31 15:02:55,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-10-31 15:02:55,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 15:02:55,024 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1] [2024-10-31 15:02:55,033 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-10-31 15:02:55,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.10 03:02:55 BoogieIcfgContainer [2024-10-31 15:02:55,037 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-10-31 15:02:55,037 INFO L158 Benchmark]: Toolchain (without parser) took 1711.74ms. Allocated memory is still 204.5MB. Free memory was 180.4MB in the beginning and 95.5MB in the end (delta: 84.9MB). Peak memory consumption was 85.4MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,038 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 204.5MB. Free memory is still 180.2MB. There was no memory consumed. Max. memory is 8.0GB. [2024-10-31 15:02:55,038 INFO L158 Benchmark]: CACSL2BoogieTranslator took 198.20ms. Allocated memory is still 204.5MB. Free memory was 180.4MB in the beginning and 167.3MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,038 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.07ms. Allocated memory is still 204.5MB. Free memory was 167.3MB in the beginning and 165.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,039 INFO L158 Benchmark]: Boogie Preprocessor took 29.27ms. Allocated memory is still 204.5MB. Free memory was 165.8MB in the beginning and 164.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,039 INFO L158 Benchmark]: RCFGBuilder took 236.21ms. Allocated memory is still 204.5MB. Free memory was 163.8MB in the beginning and 152.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,040 INFO L158 Benchmark]: TraceAbstraction took 1217.94ms. Allocated memory is still 204.5MB. Free memory was 152.2MB in the beginning and 95.5MB in the end (delta: 56.7MB). Peak memory consumption was 57.1MB. Max. memory is 8.0GB. [2024-10-31 15:02:55,042 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 204.5MB. Free memory is still 180.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 198.20ms. Allocated memory is still 204.5MB. Free memory was 180.4MB in the beginning and 167.3MB in the end (delta: 13.1MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 26.07ms. Allocated memory is still 204.5MB. Free memory was 167.3MB in the beginning and 165.8MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.27ms. Allocated memory is still 204.5MB. Free memory was 165.8MB in the beginning and 164.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 236.21ms. Allocated memory is still 204.5MB. Free memory was 163.8MB in the beginning and 152.7MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1217.94ms. Allocated memory is still 204.5MB. Free memory was 152.2MB in the beginning and 95.5MB in the end (delta: 56.7MB). Peak memory consumption was 57.1MB. Max. memory is 8.0GB. * 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 - UnprovableResult [Line: 16]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L38] signed char x = __VERIFIER_nondet_char(); [L39] signed char y = __VERIFIER_nondet_char(); [L40] signed char g; [L42] CALL, EXPR gcd_test(x, y) [L22] signed char t; [L24] COND FALSE !(a < (signed char)0) [L25] COND TRUE b < (signed char)0 [L25] b = -b [L27] COND TRUE b != (signed char)0 [L28] t = b [L29] b = a % b [L30] a = t [L27] COND FALSE !(b != (signed char)0) [L32] return a; [L42] RET, EXPR gcd_test(x, y) [L42] g = gcd_test(x, y) [L44] COND TRUE x > (signed char)0 [L45] CALL __VERIFIER_assert(x >= g) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 21 mSDsluCounter, 76 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 62 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 80 IncrementalHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 14 mSDtfsCounter, 80 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 11, 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, 1 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 136 SizeOfPredicates, 2 NumberOfNonLiveVariables, 36 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-10-31 15:02:55,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...