/usr/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/loop-acceleration/simple_2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 23:00:35,060 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 23:00:35,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 23:00:35,099 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 23:00:35,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 23:00:35,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 23:00:35,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 23:00:35,108 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 23:00:35,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 23:00:35,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 23:00:35,115 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 23:00:35,117 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-03-31 23:00:35,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 23:00:35,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 23:00:35,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 23:00:35,148 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 23:00:35,175 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 23:00:35,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 23:00:35,176 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 23:00:35,176 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 23:00:35,177 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 23:00:35,177 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 23:00:35,177 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 23:00:35,177 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 23:00:35,178 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 23:00:35,178 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 23:00:35,178 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 23:00:35,179 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 23:00:35,179 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 23:00:35,180 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 23:00:35,180 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 23:00:35,180 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 23:00:35,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 23:00:35,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 23:00:35,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 23:00:35,181 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 23:00:35,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:00:35,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 23:00:35,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 23:00:35,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 23:00:35,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 23:00:35,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 23:00:35,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 23:00:35,400 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 23:00:35,401 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 23:00:35,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_2-2.c [2023-03-31 23:00:36,604 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 23:00:36,743 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 23:00:36,744 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_2-2.c [2023-03-31 23:00:36,748 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b93c260a/aed441fa481c48bc8137823e16d9e7a3/FLAG789354eb4 [2023-03-31 23:00:36,760 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b93c260a/aed441fa481c48bc8137823e16d9e7a3 [2023-03-31 23:00:36,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 23:00:36,763 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 23:00:36,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 23:00:36,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 23:00:36,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 23:00:36,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14da08e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36, skipping insertion in model container [2023-03-31 23:00:36,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 23:00:36,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 23:00:36,888 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_2-2.c[372,385] [2023-03-31 23:00:36,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:00:36,903 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 23:00:36,911 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_2-2.c[372,385] [2023-03-31 23:00:36,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 23:00:36,923 INFO L208 MainTranslator]: Completed translation [2023-03-31 23:00:36,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36 WrapperNode [2023-03-31 23:00:36,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 23:00:36,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 23:00:36,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 23:00:36,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 23:00:36,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,941 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,944 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,944 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,945 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 23:00:36,946 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 23:00:36,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 23:00:36,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 23:00:36,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (1/1) ... [2023-03-31 23:00:36,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 23:00:36,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 23:00:36,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 23:00:36,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 23:00:37,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 23:00:37,006 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 23:00:37,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 23:00:37,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 23:00:37,006 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 23:00:37,007 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 23:00:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 23:00:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 23:00:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 23:00:37,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 23:00:37,056 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 23:00:37,058 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 23:00:37,141 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 23:00:37,164 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 23:00:37,164 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 23:00:37,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:00:37 BoogieIcfgContainer [2023-03-31 23:00:37,166 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 23:00:37,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 23:00:37,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 23:00:37,170 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 23:00:37,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 11:00:36" (1/3) ... [2023-03-31 23:00:37,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3d2c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:00:37, skipping insertion in model container [2023-03-31 23:00:37,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 11:00:36" (2/3) ... [2023-03-31 23:00:37,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3d2c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 11:00:37, skipping insertion in model container [2023-03-31 23:00:37,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 11:00:37" (3/3) ... [2023-03-31 23:00:37,173 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_2-2.c [2023-03-31 23:00:37,199 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 23:00:37,199 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 23:00:37,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 23:00:37,248 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@ce50124, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 23:00:37,249 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 23:00:37,252 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 23:00:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 23:00:37,257 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 23:00:37,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 23:00:37,258 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 23:00:37,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 23:00:37,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1816931525, now seen corresponding path program 1 times [2023-03-31 23:00:37,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 23:00:37,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026540185] [2023-03-31 23:00:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 23:00:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 23:00:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 23:00:37,349 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 23:00:37,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 23:00:37,404 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 23:00:37,406 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 23:00:37,408 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 23:00:37,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 23:00:37,413 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-03-31 23:00:37,419 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 23:00:37,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 11:00:37 BoogieIcfgContainer [2023-03-31 23:00:37,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 23:00:37,444 INFO L158 Benchmark]: Toolchain (without parser) took 680.95ms. Allocated memory was 188.7MB in the beginning and 288.4MB in the end (delta: 99.6MB). Free memory was 137.4MB in the beginning and 257.9MB in the end (delta: -120.5MB). Peak memory consumption was 40.5MB. Max. memory is 8.0GB. [2023-03-31 23:00:37,445 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 141.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 23:00:37,445 INFO L158 Benchmark]: CACSL2BoogieTranslator took 159.58ms. Allocated memory is still 188.7MB. Free memory was 137.1MB in the beginning and 127.4MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 23:00:37,446 INFO L158 Benchmark]: Boogie Preprocessor took 21.46ms. Allocated memory is still 188.7MB. Free memory was 127.4MB in the beginning and 126.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-03-31 23:00:37,447 INFO L158 Benchmark]: RCFGBuilder took 220.11ms. Allocated memory is still 188.7MB. Free memory was 125.9MB in the beginning and 115.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 23:00:37,452 INFO L158 Benchmark]: TraceAbstraction took 275.28ms. Allocated memory was 188.7MB in the beginning and 288.4MB in the end (delta: 99.6MB). Free memory was 114.8MB in the beginning and 257.9MB in the end (delta: -143.1MB). Peak memory consumption was 17.4MB. Max. memory is 8.0GB. [2023-03-31 23:00:37,457 INFO L339 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 188.7MB. Free memory is still 141.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 159.58ms. Allocated memory is still 188.7MB. Free memory was 137.1MB in the beginning and 127.4MB in the end (delta: 9.8MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 21.46ms. Allocated memory is still 188.7MB. Free memory was 127.4MB in the beginning and 126.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 220.11ms. Allocated memory is still 188.7MB. Free memory was 125.9MB in the beginning and 115.6MB in the end (delta: 10.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 275.28ms. Allocated memory was 188.7MB in the beginning and 288.4MB in the end (delta: 99.6MB). Free memory was 114.8MB in the beginning and 257.9MB in the end (delta: -143.1MB). Peak memory consumption was 17.4MB. 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 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = __VERIFIER_nondet_uint(); [L16] COND FALSE !(x < 0x0fffffff) VAL [x=268435455] [L20] CALL __VERIFIER_assert(x > 0x0fffffff) VAL [\old(cond)=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L8] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 proved your program to be incorrect! [2023-03-31 23:00:37,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...