/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/loop-invariants/even.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-24 23:57:00,305 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-24 23:57:00,356 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Bitvector.epf [2023-12-24 23:57:00,360 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-24 23:57:00,364 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-24 23:57:00,391 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-24 23:57:00,391 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-24 23:57:00,391 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-24 23:57:00,392 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-24 23:57:00,392 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-24 23:57:00,393 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-24 23:57:00,393 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-24 23:57:00,393 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-24 23:57:00,394 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-24 23:57:00,394 INFO L153 SettingsManager]: * Use SBE=true [2023-12-24 23:57:00,394 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-24 23:57:00,395 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-24 23:57:00,395 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-24 23:57:00,395 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-24 23:57:00,396 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-24 23:57:00,396 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-24 23:57:00,400 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-24 23:57:00,400 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-24 23:57:00,401 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-24 23:57:00,404 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-24 23:57:00,404 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-24 23:57:00,404 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-24 23:57:00,405 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-24 23:57:00,406 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-24 23:57:00,406 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-24 23:57:00,407 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-24 23:57:00,407 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-24 23:57:00,407 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-24 23:57:00,407 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-24 23:57:00,407 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 23:57:00,407 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-24 23:57:00,408 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-24 23:57:00,409 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-24 23:57:00,409 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-24 23:57:00,410 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-24 23:57:00,410 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-12-24 23:57:00,410 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-12-24 23:57:00,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-24 23:57:00,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-24 23:57:00,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-24 23:57:00,671 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-24 23:57:00,671 INFO L274 PluginConnector]: CDTParser initialized [2023-12-24 23:57:00,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/even.c [2023-12-24 23:57:01,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-24 23:57:02,011 INFO L384 CDTParser]: Found 1 translation units. [2023-12-24 23:57:02,012 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c [2023-12-24 23:57:02,017 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823e01d8a/0d091b21b66b4baab2e1f03e26c874b4/FLAGd648812b9 [2023-12-24 23:57:02,028 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/823e01d8a/0d091b21b66b4baab2e1f03e26c874b4 [2023-12-24 23:57:02,030 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-24 23:57:02,031 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-24 23:57:02,032 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-24 23:57:02,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-24 23:57:02,040 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-24 23:57:02,041 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,041 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a8ec15d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02, skipping insertion in model container [2023-12-24 23:57:02,041 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,055 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-24 23:57:02,169 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[580,593] [2023-12-24 23:57:02,181 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 23:57:02,196 INFO L202 MainTranslator]: Completed pre-run [2023-12-24 23:57:02,207 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/even.c[580,593] [2023-12-24 23:57:02,210 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-24 23:57:02,222 INFO L206 MainTranslator]: Completed translation [2023-12-24 23:57:02,222 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02 WrapperNode [2023-12-24 23:57:02,222 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-24 23:57:02,223 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-24 23:57:02,223 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-24 23:57:02,224 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-24 23:57:02,229 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,240 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,255 INFO L138 Inliner]: procedures = 13, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 34 [2023-12-24 23:57:02,256 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-24 23:57:02,256 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-24 23:57:02,257 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-24 23:57:02,257 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-24 23:57:02,265 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,265 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,267 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,275 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7]. The 0 writes are split as follows [0, 0]. [2023-12-24 23:57:02,276 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,276 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,281 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,283 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,284 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,285 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-24 23:57:02,289 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-24 23:57:02,289 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-24 23:57:02,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-24 23:57:02,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (1/1) ... [2023-12-24 23:57:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-24 23:57:02,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-24 23:57:02,325 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) [2023-12-24 23:57:02,349 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 [2023-12-24 23:57:02,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-24 23:57:02,357 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-24 23:57:02,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-24 23:57:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2023-12-24 23:57:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2023-12-24 23:57:02,417 INFO L241 CfgBuilder]: Building ICFG [2023-12-24 23:57:02,421 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-24 23:57:02,573 INFO L282 CfgBuilder]: Performing block encoding [2023-12-24 23:57:02,596 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-24 23:57:02,596 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-24 23:57:02,597 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 11:57:02 BoogieIcfgContainer [2023-12-24 23:57:02,597 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-24 23:57:02,599 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-24 23:57:02,599 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-24 23:57:02,601 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-24 23:57:02,602 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.12 11:57:02" (1/3) ... [2023-12-24 23:57:02,603 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa458ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 11:57:02, skipping insertion in model container [2023-12-24 23:57:02,603 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.12 11:57:02" (2/3) ... [2023-12-24 23:57:02,604 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa458ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.12 11:57:02, skipping insertion in model container [2023-12-24 23:57:02,604 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.12 11:57:02" (3/3) ... [2023-12-24 23:57:02,605 INFO L112 eAbstractionObserver]: Analyzing ICFG even.c [2023-12-24 23:57:02,620 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-24 23:57:02,621 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-24 23:57:02,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-24 23:57:02,678 INFO L357 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, mHoare=true, 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;@4665c796, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-24 23:57:02,679 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-24 23:57:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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) [2023-12-24 23:57:02,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-24 23:57:02,691 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:57:02,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-24 23:57:02,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:57:02,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:57:02,700 INFO L85 PathProgramCache]: Analyzing trace with hash 58614883, now seen corresponding path program 1 times [2023-12-24 23:57:02,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:57:02,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360333227] [2023-12-24 23:57:02,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:57:02,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:02,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:57:02,720 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:57:02,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-12-24 23:57:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:57:02,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-24 23:57:02,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:57:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:57:02,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 23:57:02,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:57:02,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360333227] [2023-12-24 23:57:02,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360333227] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 23:57:02,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 23:57:02,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-24 23:57:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060996873] [2023-12-24 23:57:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:57:02,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-24 23:57:02,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:57:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-24 23:57:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 23:57:02,842 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-24 23:57:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:57:02,874 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-12-24 23:57:02,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-24 23:57:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 [2023-12-24 23:57:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:57:02,886 INFO L225 Difference]: With dead ends: 15 [2023-12-24 23:57:02,886 INFO L226 Difference]: Without dead ends: 7 [2023-12-24 23:57:02,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-24 23:57:02,890 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:57:02,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:57:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2023-12-24 23:57:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2023-12-24 23:57:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-12-24 23:57:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2023-12-24 23:57:02,913 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2023-12-24 23:57:02,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:57:02,913 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2023-12-24 23:57:02,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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) [2023-12-24 23:57:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2023-12-24 23:57:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-24 23:57:02,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:57:02,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-24 23:57:02,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-12-24 23:57:03,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:03,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:57:03,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:57:03,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1810415056, now seen corresponding path program 1 times [2023-12-24 23:57:03,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:57:03,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1057478730] [2023-12-24 23:57:03,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:57:03,119 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:03,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:57:03,120 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:57:03,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-12-24 23:57:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:57:03,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-24 23:57:03,155 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:57:03,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:57:03,199 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-24 23:57:03,199 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:57:03,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1057478730] [2023-12-24 23:57:03,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1057478730] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-24 23:57:03,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-24 23:57:03,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-24 23:57:03,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161310001] [2023-12-24 23:57:03,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:57:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-24 23:57:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:57:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-24 23:57:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-24 23:57:03,207 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-24 23:57:03,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:57:03,230 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2023-12-24 23:57:03,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-24 23:57:03,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-12-24 23:57:03,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:57:03,231 INFO L225 Difference]: With dead ends: 13 [2023-12-24 23:57:03,231 INFO L226 Difference]: Without dead ends: 9 [2023-12-24 23:57:03,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-24 23:57:03,232 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:57:03,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:57:03,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-12-24 23:57:03,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-12-24 23:57:03,235 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) [2023-12-24 23:57:03,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-12-24 23:57:03,236 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2023-12-24 23:57:03,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:57:03,236 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-12-24 23:57:03,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-12-24 23:57:03,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-12-24 23:57:03,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-24 23:57:03,237 INFO L187 NwaCegarLoop]: Found error trace [2023-12-24 23:57:03,237 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-12-24 23:57:03,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-12-24 23:57:03,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:03,440 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-24 23:57:03,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-24 23:57:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 395788235, now seen corresponding path program 1 times [2023-12-24 23:57:03,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-12-24 23:57:03,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348507195] [2023-12-24 23:57:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-24 23:57:03,441 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:03,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2023-12-24 23:57:03,443 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-12-24 23:57:03,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-12-24 23:57:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-24 23:57:03,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-24 23:57:03,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-24 23:57:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-24 23:57:03,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-24 23:57:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-24 23:57:03,556 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-12-24 23:57:03,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348507195] [2023-12-24 23:57:03,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348507195] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-24 23:57:03,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-24 23:57:03,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-12-24 23:57:03,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966137687] [2023-12-24 23:57:03,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-24 23:57:03,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-24 23:57:03,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-12-24 23:57:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-24 23:57:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-24 23:57:03,559 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-12-24 23:57:03,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-24 23:57:03,575 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2023-12-24 23:57:03,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-24 23:57:03,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 [2023-12-24 23:57:03,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-24 23:57:03,576 INFO L225 Difference]: With dead ends: 9 [2023-12-24 23:57:03,576 INFO L226 Difference]: Without dead ends: 0 [2023-12-24 23:57:03,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-24 23:57:03,577 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-24 23:57:03,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 4 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-24 23:57:03,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-24 23:57:03,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-24 23:57:03,579 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) [2023-12-24 23:57:03,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-24 23:57:03,579 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2023-12-24 23:57:03,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-24 23:57:03,579 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-24 23:57:03,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-12-24 23:57:03,580 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-24 23:57:03,580 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-24 23:57:03,582 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-24 23:57:03,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-24 23:57:03,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-24 23:57:03,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-24 23:57:03,809 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-24 23:57:03,809 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2023-12-24 23:57:03,809 INFO L899 garLoopResultBuilder]: For program point L13-2(lines 12 17) no Hoare annotation was computed. [2023-12-24 23:57:03,810 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-24 23:57:03,810 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-12-24 23:57:03,810 INFO L899 garLoopResultBuilder]: For program point L20-1(lines 20 22) no Hoare annotation was computed. [2023-12-24 23:57:03,810 INFO L895 garLoopResultBuilder]: At program point L20-3(lines 20 22) the Hoare annotation is: (= (bvurem |ULTIMATE.start_main_~x~0#1| (_ bv2 32)) (_ bv0 32)) [2023-12-24 23:57:03,810 INFO L899 garLoopResultBuilder]: For program point L20-4(lines 20 22) no Hoare annotation was computed. [2023-12-24 23:57:03,810 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2023-12-24 23:57:03,813 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-12-24 23:57:03,815 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-24 23:57:03,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.12 11:57:03 BoogieIcfgContainer [2023-12-24 23:57:03,827 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-24 23:57:03,828 INFO L158 Benchmark]: Toolchain (without parser) took 1796.25ms. Allocated memory is still 278.9MB. Free memory was 225.4MB in the beginning and 243.8MB in the end (delta: -18.5MB). Peak memory consumption was 71.2MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,828 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 186.6MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-24 23:57:03,830 INFO L158 Benchmark]: CACSL2BoogieTranslator took 190.88ms. Allocated memory is still 278.9MB. Free memory was 224.9MB in the beginning and 213.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,831 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.63ms. Allocated memory is still 278.9MB. Free memory was 213.8MB in the beginning and 212.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,831 INFO L158 Benchmark]: Boogie Preprocessor took 32.21ms. Allocated memory is still 278.9MB. Free memory was 212.7MB in the beginning and 210.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,831 INFO L158 Benchmark]: RCFGBuilder took 307.81ms. Allocated memory is still 278.9MB. Free memory was 210.7MB in the beginning and 199.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,832 INFO L158 Benchmark]: TraceAbstraction took 1227.85ms. Allocated memory is still 278.9MB. Free memory was 198.6MB in the beginning and 243.8MB in the end (delta: -45.2MB). Peak memory consumption was 45.0MB. Max. memory is 8.0GB. [2023-12-24 23:57:03,833 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 186.6MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 190.88ms. Allocated memory is still 278.9MB. Free memory was 224.9MB in the beginning and 213.8MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 32.63ms. Allocated memory is still 278.9MB. Free memory was 213.8MB in the beginning and 212.7MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 32.21ms. Allocated memory is still 278.9MB. Free memory was 212.7MB in the beginning and 210.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 307.81ms. Allocated memory is still 278.9MB. Free memory was 210.7MB in the beginning and 199.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1227.85ms. Allocated memory is still 278.9MB. Free memory was 198.6MB in the beginning and 243.8MB in the end (delta: -45.2MB). Peak memory consumption was 45.0MB. 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 - PositiveResult [Line: 14]: 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, 9 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 22 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16 IncrementalHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 13 mSDtfsCounter, 16 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=0, InterpolantAutomatonStates: 10, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 1 LocationsWithAnnotation, 1 PreInvPairs, 2 NumberOfFragments, 5 HoareAnnotationTreeSize, 1 FormulaSimplifications, 6 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 1 FormulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 66 SizeOfPredicates, 4 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 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: 20]: Loop Invariant Derived loop invariant: ((x % 2) == 0) RESULT: Ultimate proved your program to be correct! [2023-12-24 23:57:03,848 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...