/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/test03.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:30:34,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:30:34,706 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:30:34,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:30:34,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:30:34,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:30:34,749 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:30:34,754 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:30:34,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:30:34,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:30:34,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:30:34,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-02 21:30:34,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:30:34,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:30:34,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:30:34,797 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 21:30:34,825 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:30:34,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:30:34,826 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:30:34,826 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:30:34,827 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:30:34,827 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:30:34,827 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:30:34,828 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:30:34,828 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:30:34,828 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:30:34,829 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:30:34,829 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:30:34,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:30:34,830 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:30:34,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:30:34,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:30:34,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:30:34,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:30:34,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:30:34,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:30:34,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:34,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:30:34,832 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:30:34,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:30:34,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:30:34,833 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:30:34,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:30:34,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:30:34,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:30:34,833 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:30:35,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:30:35,093 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:30:35,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:30:35,097 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:30:35,097 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:30:35,098 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test03.c [2023-04-02 21:30:36,257 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:30:36,459 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:30:36,459 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test03.c [2023-04-02 21:30:36,464 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711fac10e/62a924858a154018807dc3ec1e58b1da/FLAG35a0067a1 [2023-04-02 21:30:36,480 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/711fac10e/62a924858a154018807dc3ec1e58b1da [2023-04-02 21:30:36,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:30:36,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:30:36,487 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:36,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:30:36,491 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:30:36,491 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,493 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61d5e315 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36, skipping insertion in model container [2023-04-02 21:30:36,493 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,499 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:30:36,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:30:36,652 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/test03.c[477,490] [2023-04-02 21:30:36,656 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:36,669 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:30:36,683 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/test03.c[477,490] [2023-04-02 21:30:36,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:36,695 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:30:36,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36 WrapperNode [2023-04-02 21:30:36,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:36,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:30:36,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:30:36,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:30:36,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,727 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,731 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:30:36,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:30:36,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:30:36,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:30:36,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (1/1) ... [2023-04-02 21:30:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:36,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:30:36,772 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 21:30:36,797 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 21:30:36,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2023-04-02 21:30:36,812 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:30:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure f [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:30:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:30:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:30:36,894 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:30:36,896 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:30:36,991 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:30:37,007 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:30:37,008 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-02 21:30:37,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:37 BoogieIcfgContainer [2023-04-02 21:30:37,010 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:30:37,012 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:30:37,012 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:30:37,015 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:30:37,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:30:36" (1/3) ... [2023-04-02 21:30:37,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e095d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:37, skipping insertion in model container [2023-04-02 21:30:37,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:36" (2/3) ... [2023-04-02 21:30:37,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e095d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:37, skipping insertion in model container [2023-04-02 21:30:37,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:37" (3/3) ... [2023-04-02 21:30:37,017 INFO L112 eAbstractionObserver]: Analyzing ICFG test03.c [2023-04-02 21:30:37,034 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:30:37,034 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:30:37,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:30:37,080 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;@e7fd165, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:30:37,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:30:37,084 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 21:30:37,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 21:30:37,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:37,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:37,091 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:37,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:37,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1848283306, now seen corresponding path program 1 times [2023-04-02 21:30:37,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:37,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959686747] [2023-04-02 21:30:37,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:37,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:37,638 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:30:37,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959686747] [2023-04-02 21:30:37,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959686747] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:30:37,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:30:37,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-02 21:30:37,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559506091] [2023-04-02 21:30:37,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:30:37,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-02 21:30:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:30:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-02 21:30:37,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-04-02 21:30:37,670 INFO L87 Difference]: Start difference. First 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) Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:37,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:30:37,746 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2023-04-02 21:30:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 21:30:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2023-04-02 21:30:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:30:37,754 INFO L225 Difference]: With dead ends: 20 [2023-04-02 21:30:37,755 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 21:30:37,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-04-02 21:30:37,764 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:30:37,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 34 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:30:37,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 21:30:37,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 21:30:37,786 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) [2023-04-02 21:30:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 21:30:37,788 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2023-04-02 21:30:37,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:30:37,788 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 21:30:37,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 21:30:37,789 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 21:30:37,792 INFO L805 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:30:37,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:30:37,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 21:30:37,810 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-02 21:30:37,810 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-02 21:30:37,810 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 6 8) the Hoare annotation is: true [2023-04-02 21:30:37,810 INFO L899 garLoopResultBuilder]: For program point fEXIT(lines 6 8) no Hoare annotation was computed. [2023-04-02 21:30:37,811 INFO L899 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 28) no Hoare annotation was computed. [2023-04-02 21:30:37,811 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 12 30) no Hoare annotation was computed. [2023-04-02 21:30:37,811 INFO L895 garLoopResultBuilder]: At program point ERROR(lines 12 30) the Hoare annotation is: false [2023-04-02 21:30:37,811 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 12 30) the Hoare annotation is: true [2023-04-02 21:30:37,812 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 12 30) no Hoare annotation was computed. [2023-04-02 21:30:37,812 INFO L899 garLoopResultBuilder]: For program point L22(lines 22 24) no Hoare annotation was computed. [2023-04-02 21:30:37,812 INFO L895 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (not (= main_~p1~0.base main_~p2~0.base)) [2023-04-02 21:30:37,813 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2023-04-02 21:30:37,813 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 21:30:37,814 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 21:30:37,814 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 21:30:37,814 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 21:30:37,814 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 21:30:37,815 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 21:30:37,822 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-04-02 21:30:37,826 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:30:37,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:30:37 BoogieIcfgContainer [2023-04-02 21:30:37,840 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:30:37,840 INFO L158 Benchmark]: Toolchain (without parser) took 1356.36ms. Allocated memory is still 256.9MB. Free memory was 211.8MB in the beginning and 142.1MB in the end (delta: 69.7MB). Peak memory consumption was 69.2MB. Max. memory is 8.0GB. [2023-04-02 21:30:37,841 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 167.8MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:30:37,843 INFO L158 Benchmark]: CACSL2BoogieTranslator took 208.83ms. Allocated memory is still 256.9MB. Free memory was 211.8MB in the beginning and 201.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-04-02 21:30:37,844 INFO L158 Benchmark]: Boogie Preprocessor took 38.09ms. Allocated memory is still 256.9MB. Free memory was 201.8MB in the beginning and 200.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:30:37,847 INFO L158 Benchmark]: RCFGBuilder took 273.99ms. Allocated memory is still 256.9MB. Free memory was 200.2MB in the beginning and 188.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 21:30:37,847 INFO L158 Benchmark]: TraceAbstraction took 827.88ms. Allocated memory is still 256.9MB. Free memory was 187.7MB in the beginning and 142.1MB in the end (delta: 45.6MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. [2023-04-02 21:30:37,853 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 167.8MB. Free memory is still 119.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 208.83ms. Allocated memory is still 256.9MB. Free memory was 211.8MB in the beginning and 201.8MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.09ms. Allocated memory is still 256.9MB. Free memory was 201.8MB in the beginning and 200.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 273.99ms. Allocated memory is still 256.9MB. Free memory was 200.2MB in the beginning and 188.2MB in the end (delta: 12.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 827.88ms. Allocated memory is still 256.9MB. Free memory was 187.7MB in the beginning and 142.1MB in the end (delta: 45.6MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 28]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 26 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 8 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=0, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 10 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 23 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2023-04-02 21:30:37,874 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...