/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/array-industry-pattern/array_of_struct_ptr_monotonic.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 02:43:40,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 02:43:40,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 02:43:40,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 02:43:40,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 02:43:40,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 02:43:40,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 02:43:40,926 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 02:43:40,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 02:43:40,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 02:43:40,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 02:43:40,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-01 02:43:40,965 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 02:43:40,966 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 02:43:40,967 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 02:43:40,967 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 [2023-04-01 02:43:40,997 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 02:43:40,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 02:43:40,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 02:43:40,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 02:43:40,998 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 02:43:40,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 02:43:40,999 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 02:43:40,999 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 02:43:40,999 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 02:43:40,999 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 02:43:41,000 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 02:43:41,000 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 02:43:41,001 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 02:43:41,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 02:43:41,001 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 02:43:41,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 02:43:41,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 02:43:41,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 02:43:41,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:43:41,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 02:43:41,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 02:43:41,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 02:43:41,004 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 02:43:41,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 02:43:41,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 02:43:41,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 02:43:41,004 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 02:43:41,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 02:43:41,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 02:43:41,246 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 02:43:41,248 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 02:43:41,248 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 02:43:41,249 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-04-01 02:43:42,407 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 02:43:42,554 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 02:43:42,555 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_monotonic.i [2023-04-01 02:43:42,560 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17c5a42f/0d9e399eac714eb4882b93fc5b8fd3ba/FLAG7fa5ae7db [2023-04-01 02:43:42,572 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d17c5a42f/0d9e399eac714eb4882b93fc5b8fd3ba [2023-04-01 02:43:42,574 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 02:43:42,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 02:43:42,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 02:43:42,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 02:43:42,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 02:43:42,580 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,582 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad0c64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42, skipping insertion in model container [2023-04-01 02:43:42,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 02:43:42,603 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 02:43:42,774 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/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-04-01 02:43:42,792 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:43:42,804 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 02:43:42,818 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/array-industry-pattern/array_of_struct_ptr_monotonic.i[999,1012] [2023-04-01 02:43:42,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 02:43:42,847 INFO L208 MainTranslator]: Completed translation [2023-04-01 02:43:42,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42 WrapperNode [2023-04-01 02:43:42,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 02:43:42,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 02:43:42,849 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 02:43:42,849 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 02:43:42,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,888 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 02:43:42,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 02:43:42,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 02:43:42,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 02:43:42,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (1/1) ... [2023-04-01 02:43:42,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 02:43:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:42,932 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) [2023-04-01 02:43:42,953 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 [2023-04-01 02:43:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 02:43:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 02:43:42,975 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 02:43:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 02:43:42,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 02:43:42,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 02:43:42,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 02:43:43,089 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 02:43:43,091 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 02:43:43,249 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 02:43:43,324 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 02:43:43,324 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 02:43:43,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:43:43 BoogieIcfgContainer [2023-04-01 02:43:43,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 02:43:43,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 02:43:43,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 02:43:43,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 02:43:43,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 02:43:42" (1/3) ... [2023-04-01 02:43:43,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db583e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:43:43, skipping insertion in model container [2023-04-01 02:43:43,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 02:43:42" (2/3) ... [2023-04-01 02:43:43,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5db583e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 02:43:43, skipping insertion in model container [2023-04-01 02:43:43,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 02:43:43" (3/3) ... [2023-04-01 02:43:43,334 INFO L112 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_monotonic.i [2023-04-01 02:43:43,358 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 02:43:43,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 02:43:43,397 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 02:43:43,402 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;@3d0d6501, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 02:43:43,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 02:43:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-04-01 02:43:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 02:43:43,410 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:43,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:43,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:43,415 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:43,415 INFO L85 PathProgramCache]: Analyzing trace with hash -779701689, now seen corresponding path program 1 times [2023-04-01 02:43:43,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:43,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224687758] [2023-04-01 02:43:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:43,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:43,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:43,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:43,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224687758] [2023-04-01 02:43:43,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224687758] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 02:43:43,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 02:43:43,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 02:43:43,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910113399] [2023-04-01 02:43:43,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 02:43:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 02:43:43,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:43,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 02:43:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:43:43,682 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:43,758 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2023-04-01 02:43:43,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 02:43:43,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-04-01 02:43:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:43,768 INFO L225 Difference]: With dead ends: 40 [2023-04-01 02:43:43,769 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 02:43:43,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 02:43:43,776 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:43,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:43:43,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 02:43:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-04-01 02:43:43,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 02:43:43,813 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 02:43:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:43,813 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 02:43:43,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 02:43:43,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 02:43:43,815 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:43,815 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:43,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 02:43:43,816 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:43,817 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:43,817 INFO L85 PathProgramCache]: Analyzing trace with hash -654383947, now seen corresponding path program 1 times [2023-04-01 02:43:43,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:43,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102709934] [2023-04-01 02:43:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:43,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:43,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:43,995 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102709934] [2023-04-01 02:43:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102709934] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:43,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561183600] [2023-04-01 02:43:43,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:43,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:43,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:44,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:44,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 02:43:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:44,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 02:43:44,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:44,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:44,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561183600] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:44,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857497110] [2023-04-01 02:43:44,227 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:43:44,228 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:44,232 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:44,238 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:44,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:44,399 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 02:43:44,648 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-01 02:43:44,677 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 02:43:44,695 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:45,060 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '189#(and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 10) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:45,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:45,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:45,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 02:43:45,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933264947] [2023-04-01 02:43:45,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:45,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 02:43:45,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 02:43:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:43:45,063 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:45,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:45,121 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-04-01 02:43:45,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 02:43:45,122 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 02:43:45,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:45,123 INFO L225 Difference]: With dead ends: 48 [2023-04-01 02:43:45,123 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 02:43:45,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-04-01 02:43:45,125 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:45,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 02:43:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 02:43:45,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 21. [2023-04-01 02:43:45,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 02:43:45,130 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-04-01 02:43:45,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:45,130 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 02:43:45,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 02:43:45,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 02:43:45,131 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:45,131 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:45,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:45,344 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:45,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash 121036231, now seen corresponding path program 2 times [2023-04-01 02:43:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:45,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830362067] [2023-04-01 02:43:45,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:45,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:45,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830362067] [2023-04-01 02:43:45,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830362067] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:45,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084483009] [2023-04-01 02:43:45,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:43:45,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:45,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:45,588 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:45,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 02:43:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 02:43:45,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:43:45,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 02:43:45,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:45,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084483009] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525412447] [2023-04-01 02:43:45,932 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:43:45,933 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:45,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:45,933 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:45,933 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:45,991 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 02:43:46,123 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-01 02:43:46,136 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 02:43:46,146 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:46,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '409#(and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 10) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:46,485 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:46,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:46,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-04-01 02:43:46,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694820054] [2023-04-01 02:43:46,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:46,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 02:43:46,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 02:43:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:43:46,487 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:46,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:46,612 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2023-04-01 02:43:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 02:43:46,613 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 02:43:46,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:46,616 INFO L225 Difference]: With dead ends: 84 [2023-04-01 02:43:46,616 INFO L226 Difference]: Without dead ends: 73 [2023-04-01 02:43:46,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2023-04-01 02:43:46,621 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:46,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 70 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 02:43:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-04-01 02:43:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 27. [2023-04-01 02:43:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2023-04-01 02:43:46,630 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2023-04-01 02:43:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:46,630 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2023-04-01 02:43:46,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2023-04-01 02:43:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 02:43:46,631 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:46,631 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:46,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:46,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 02:43:46,832 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:46,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1683892473, now seen corresponding path program 3 times [2023-04-01 02:43:46,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:46,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070093522] [2023-04-01 02:43:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:47,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070093522] [2023-04-01 02:43:47,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070093522] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:47,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559930673] [2023-04-01 02:43:47,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 02:43:47,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:47,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:47,243 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:47,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 02:43:47,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 02:43:47,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 02:43:47,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 02:43:47,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:47,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:47,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559930673] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:47,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1478681220] [2023-04-01 02:43:47,711 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:43:47,711 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:47,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:47,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:47,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:47,759 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 02:43:47,857 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-01 02:43:47,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 02:43:47,876 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:48,187 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '743#(and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 10) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:48,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:48,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:48,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-04-01 02:43:48,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62235298] [2023-04-01 02:43:48,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 02:43:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 02:43:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:43:48,190 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:48,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:48,421 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-04-01 02:43:48,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 02:43:48,422 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-04-01 02:43:48,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:48,427 INFO L225 Difference]: With dead ends: 156 [2023-04-01 02:43:48,427 INFO L226 Difference]: Without dead ends: 145 [2023-04-01 02:43:48,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 02:43:48,432 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 251 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:48,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 109 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 02:43:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-04-01 02:43:48,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 39. [2023-04-01 02:43:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-01 02:43:48,451 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2023-04-01 02:43:48,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:48,451 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-01 02:43:48,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-01 02:43:48,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 02:43:48,452 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:48,456 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:48,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:48,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:48,663 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:48,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:48,664 INFO L85 PathProgramCache]: Analyzing trace with hash 960231815, now seen corresponding path program 4 times [2023-04-01 02:43:48,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:48,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752956278] [2023-04-01 02:43:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:48,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:49,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:49,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752956278] [2023-04-01 02:43:49,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752956278] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:49,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800933370] [2023-04-01 02:43:49,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 02:43:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:49,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:49,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 02:43:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:50,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 02:43:50,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 02:43:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:50,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 02:43:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:51,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800933370] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 02:43:51,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1208112003] [2023-04-01 02:43:51,121 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 02:43:51,121 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 02:43:51,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 02:43:51,122 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 02:43:51,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 02:43:51,155 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 29 for LOIs [2023-04-01 02:43:51,237 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 42 for LOIs [2023-04-01 02:43:51,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 19 for LOIs [2023-04-01 02:43:51,257 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 02:43:51,612 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1305#(and (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (<= 1 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| 3) 0)) (+ (select (select |#memory_$Pointer$.offset| 3) 0) 4)) 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_int| (select (select |#memory_$Pointer$.base| 3) 0)) (select (select |#memory_$Pointer$.offset| 3) 0)) 10) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 02:43:51,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 02:43:51,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 02:43:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-04-01 02:43:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288921725] [2023-04-01 02:43:51,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 02:43:51,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 02:43:51,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 02:43:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 02:43:51,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 02:43:51,628 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 02:43:52,276 INFO L93 Difference]: Finished difference Result 300 states and 417 transitions. [2023-04-01 02:43:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-04-01 02:43:52,277 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2023-04-01 02:43:52,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 02:43:52,279 INFO L225 Difference]: With dead ends: 300 [2023-04-01 02:43:52,279 INFO L226 Difference]: Without dead ends: 289 [2023-04-01 02:43:52,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 929 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1356, Invalid=2184, Unknown=0, NotChecked=0, Total=3540 [2023-04-01 02:43:52,281 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 550 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 02:43:52,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 210 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 02:43:52,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-04-01 02:43:52,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 63. [2023-04-01 02:43:52,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 02:43:52,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-04-01 02:43:52,297 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2023-04-01 02:43:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 02:43:52,298 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-04-01 02:43:52,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 02:43:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-04-01 02:43:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 02:43:52,299 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 02:43:52,299 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 02:43:52,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 02:43:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:52,508 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 02:43:52,508 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 02:43:52,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1513160327, now seen corresponding path program 5 times [2023-04-01 02:43:52,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 02:43:52,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164892837] [2023-04-01 02:43:52,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 02:43:52,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 02:43:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 02:43:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 02:43:56,276 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 02:43:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164892837] [2023-04-01 02:43:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164892837] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 02:43:56,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918946140] [2023-04-01 02:43:56,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 02:43:56,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 02:43:56,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 02:43:56,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 02:43:56,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process