/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 OctagonDomain -i ../sv-benchmarks/c/ldv-regression/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:30:39,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:30:39,941 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:30:39,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:30:39,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:30:39,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:30:39,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:30:39,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:30:39,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:30:39,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:30:39,995 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:30:39,997 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-02 21:30:40,027 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:30:40,028 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:30:40,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:30:40,029 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 [2023-04-02 21:30:40,059 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:30:40,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:30:40,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:30:40,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:30:40,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:30:40,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:30:40,060 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:30:40,061 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:30:40,061 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:30:40,061 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:30:40,061 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:30:40,062 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:30:40,062 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:30:40,063 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:30:40,063 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:30:40,063 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:30:40,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:30:40,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:30:40,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:30:40,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:30:40,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:40,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:30:40,065 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:30:40,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:30:40,303 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:30:40,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:30:40,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:30:40,325 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:30:40,326 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:30:40,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test08.c [2023-04-02 21:30:41,428 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:30:41,605 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:30:41,606 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test08.c [2023-04-02 21:30:41,610 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58346275b/48dd5e14e44b48a2af1fda89bcdeafb1/FLAGf7ba82ba0 [2023-04-02 21:30:41,620 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58346275b/48dd5e14e44b48a2af1fda89bcdeafb1 [2023-04-02 21:30:41,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:30:41,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:30:41,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:41,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:30:41,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:30:41,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3211816e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41, skipping insertion in model container [2023-04-02 21:30:41,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,634 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:30:41,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:30:41,800 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/ldv-regression/test08.c[578,591] [2023-04-02 21:30:41,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:41,814 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:30:41,827 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/ldv-regression/test08.c[578,591] [2023-04-02 21:30:41,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:41,840 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:30:41,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41 WrapperNode [2023-04-02 21:30:41,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:41,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:30:41,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:30:41,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:30:41,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,872 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:30:41,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:30:41,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:30:41,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:30:41,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (1/1) ... [2023-04-02 21:30:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:30:41,910 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) [2023-04-02 21:30:41,936 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 [2023-04-02 21:30:41,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:30:41,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:30:41,952 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:30:41,952 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-04-02 21:30:41,952 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:30:41,952 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:30:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:30:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:30:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:30:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:30:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:30:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:30:42,009 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:30:42,011 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:30:42,144 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:30:42,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:30:42,182 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 21:30:42,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:42 BoogieIcfgContainer [2023-04-02 21:30:42,193 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:30:42,195 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:30:42,195 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:30:42,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:30:42,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:30:41" (1/3) ... [2023-04-02 21:30:42,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c91b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:42, skipping insertion in model container [2023-04-02 21:30:42,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:41" (2/3) ... [2023-04-02 21:30:42,199 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17c91b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:42, skipping insertion in model container [2023-04-02 21:30:42,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:42" (3/3) ... [2023-04-02 21:30:42,201 INFO L112 eAbstractionObserver]: Analyzing ICFG test08.c [2023-04-02 21:30:42,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:30:42,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:30:42,294 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:30:42,299 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;@188e44d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:30:42,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:30:42,302 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 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) [2023-04-02 21:30:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 21:30:42,308 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:42,308 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:42,309 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:42,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2063186975, now seen corresponding path program 1 times [2023-04-02 21:30:42,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:42,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400332257] [2023-04-02 21:30:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:42,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:30:42,478 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 21:30:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 21:30:42,521 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-02 21:30:42,523 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 21:30:42,524 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:30:42,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:30:42,528 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-02 21:30:42,532 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:30:42,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:30:42 BoogieIcfgContainer [2023-04-02 21:30:42,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:30:42,555 INFO L158 Benchmark]: Toolchain (without parser) took 931.70ms. Allocated memory was 181.4MB in the beginning and 289.4MB in the end (delta: 108.0MB). Free memory was 129.4MB in the beginning and 254.6MB in the end (delta: -125.2MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:30:42,555 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:30:42,555 INFO L158 Benchmark]: CACSL2BoogieTranslator took 216.15ms. Allocated memory is still 181.4MB. Free memory was 129.4MB in the beginning and 119.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:30:42,556 INFO L158 Benchmark]: Boogie Preprocessor took 37.03ms. Allocated memory is still 181.4MB. Free memory was 119.2MB in the beginning and 117.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 21:30:42,557 INFO L158 Benchmark]: RCFGBuilder took 313.49ms. Allocated memory is still 181.4MB. Free memory was 117.9MB in the beginning and 105.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 21:30:42,557 INFO L158 Benchmark]: TraceAbstraction took 358.91ms. Allocated memory was 181.4MB in the beginning and 289.4MB in the end (delta: 108.0MB). Free memory was 104.6MB in the beginning and 254.6MB in the end (delta: -150.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:30:42,559 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 181.4MB. Free memory is still 132.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 216.15ms. Allocated memory is still 181.4MB. Free memory was 129.4MB in the beginning and 119.2MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.03ms. Allocated memory is still 181.4MB. Free memory was 119.2MB in the beginning and 117.9MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 313.49ms. Allocated memory is still 181.4MB. Free memory was 117.9MB in the beginning and 105.3MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 358.91ms. Allocated memory was 181.4MB in the beginning and 289.4MB in the end (delta: 108.0MB). Free memory was 104.6MB in the beginning and 254.6MB in the end (delta: -150.0MB). There was no memory consumed. 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: 38]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6] int a, b; [L7] int *p1, *p2; [L21] p1 = &a [L22] p2 = &b [L24] b = 1 [L25] a = 5 [L27] EXPR \read(a) [L27] a-- [L29] CALL, EXPR f() VAL [\old(p1)={4:0}, \old(p2)={0:0}, a={4:0}, b={5:0}, p1={4:0}, p2={5:0}] [L10] EXPR \read(*p1) [L10] EXPR \read(*p2) [L10] EXPR \read(a) [L10] int v = *p1 + *p2 - a; [L11] COND TRUE v == 1 [L12] p1 = p2 [L13] return v; [L29] RET, EXPR f() VAL [\old(p1)={0:0}, \old(p2)={0:0}, a={4:0}, b={5:0}, f()=1, p1={5:0}, p2={5:0}] [L29] a = f() [L31] EXPR \read(a) VAL [\old(p1)={0:0}, \old(p2)={0:0}, \read(a)=1, a={4:0}, b={5:0}, p1={5:0}, p2={5:0}] [L31] COND TRUE a && p1 == p2 [L38] reach_error() VAL [\old(p1)={0:0}, \old(p2)={0:0}, a={4:0}, b={5:0}, p1={5:0}, p2={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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=16occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 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! [2023-04-02 21:30:42,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...