/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/loop-invariants/linear-inequality-inv-b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 05:07:57,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 05:07:57,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 05:07:57,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 05:07:57,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 05:07:57,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 05:07:57,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 05:07:57,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 05:07:57,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 05:07:57,900 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 05:07:57,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 05:07:57,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 05:07:57,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 05:07:57,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 05:07:57,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 05:07:57,907 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 05:07:57,908 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 05:07:57,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 05:07:57,910 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 05:07:57,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 05:07:57,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 05:07:57,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 05:07:57,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 05:07:57,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 05:07:57,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 05:07:57,928 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 05:07:57,929 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 05:07:57,930 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 05:07:57,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 05:07:57,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 05:07:57,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 05:07:57,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 05:07:57,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 05:07:57,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 05:07:57,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 05:07:57,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 05:07:57,934 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 05:07:57,962 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 05:07:57,962 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 05:07:57,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 05:07:57,963 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 05:07:57,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 05:07:57,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 05:07:57,964 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 05:07:57,964 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 05:07:57,964 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 05:07:57,964 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 05:07:57,965 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 05:07:57,965 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 05:07:57,966 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 05:07:57,966 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 05:07:57,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 05:07:57,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 05:07:57,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 05:07:57,967 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 05:07:57,968 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 05:07:57,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 05:07:57,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 05:07:57,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:07:57,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 05:07:57,968 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 05:07:57,969 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 05:07:57,969 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 05:07:58,191 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 05:07:58,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 05:07:58,215 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 05:07:58,216 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 05:07:58,216 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 05:07:58,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2023-04-01 05:07:59,345 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 05:07:59,501 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 05:07:59,501 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2023-04-01 05:07:59,506 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1753d81/5d3e6ef03088496183a1a5015582dd74/FLAGe76431898 [2023-04-01 05:07:59,515 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3a1753d81/5d3e6ef03088496183a1a5015582dd74 [2023-04-01 05:07:59,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 05:07:59,518 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 05:07:59,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 05:07:59,519 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 05:07:59,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 05:07:59,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fee9f14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59, skipping insertion in model container [2023-04-01 05:07:59,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 05:07:59,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 05:07:59,647 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2023-04-01 05:07:59,651 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2023-04-01 05:07:59,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:07:59,660 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 05:07:59,672 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[557,570] [2023-04-01 05:07:59,673 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c[613,626] [2023-04-01 05:07:59,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 05:07:59,690 INFO L208 MainTranslator]: Completed translation [2023-04-01 05:07:59,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59 WrapperNode [2023-04-01 05:07:59,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 05:07:59,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 05:07:59,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 05:07:59,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 05:07:59,702 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,707 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,713 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,719 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 05:07:59,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 05:07:59,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 05:07:59,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 05:07:59,722 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (1/1) ... [2023-04-01 05:07:59,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 05:07:59,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:07:59,748 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 05:07:59,751 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 05:07:59,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 05:07:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 05:07:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 05:07:59,777 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 05:07:59,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 05:07:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 05:07:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 05:07:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 05:07:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 05:07:59,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 05:07:59,838 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 05:07:59,840 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 05:08:00,008 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 05:08:00,038 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 05:08:00,038 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 05:08:00,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:08:00 BoogieIcfgContainer [2023-04-01 05:08:00,041 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 05:08:00,043 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 05:08:00,043 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 05:08:00,045 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 05:08:00,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 05:07:59" (1/3) ... [2023-04-01 05:08:00,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3dfa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:08:00, skipping insertion in model container [2023-04-01 05:08:00,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 05:07:59" (2/3) ... [2023-04-01 05:08:00,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3dfa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 05:08:00, skipping insertion in model container [2023-04-01 05:08:00,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 05:08:00" (3/3) ... [2023-04-01 05:08:00,063 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2023-04-01 05:08:00,094 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 05:08:00,094 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-04-01 05:08:00,146 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 05:08:00,153 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;@5586ee25, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 05:08:00,153 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-04-01 05:08:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 05:08:00,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-04-01 05:08:00,163 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:00,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:00,164 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:00,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:00,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1975456255, now seen corresponding path program 1 times [2023-04-01 05:08:00,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:00,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748586646] [2023-04-01 05:08:00,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:00,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:00,453 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 05:08:00,454 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748586646] [2023-04-01 05:08:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748586646] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 05:08:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 05:08:00,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 05:08:00,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172880938] [2023-04-01 05:08:00,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 05:08:00,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 05:08:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 05:08:00,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 05:08:00,485 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:00,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:00,515 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-04-01 05:08:00,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 05:08:00,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-04-01 05:08:00,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:00,524 INFO L225 Difference]: With dead ends: 26 [2023-04-01 05:08:00,524 INFO L226 Difference]: Without dead ends: 11 [2023-04-01 05:08:00,526 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 05:08:00,531 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:00,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:00,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-04-01 05:08:00,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-04-01 05:08:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-04-01 05:08:00,560 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2023-04-01 05:08:00,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:00,561 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-04-01 05:08:00,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-04-01 05:08:00,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-04-01 05:08:00,562 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:00,562 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:00,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 05:08:00,562 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:00,563 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:00,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1110270621, now seen corresponding path program 1 times [2023-04-01 05:08:00,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:00,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573735918] [2023-04-01 05:08:00,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:00,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:00,686 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 05:08:00,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 05:08:00,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573735918] [2023-04-01 05:08:00,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573735918] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 05:08:00,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424932996] [2023-04-01 05:08:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:00,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 05:08:00,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 05:08:00,695 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 05:08:00,697 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 05:08:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 05:08:00,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 05:08:00,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 05:08:00,818 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 05:08:00,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 05:08:01,105 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 05:08:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424932996] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 05:08:01,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1659681829] [2023-04-01 05:08:01,123 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-04-01 05:08:01,124 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 05:08:01,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 05:08:01,138 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 05:08:01,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 05:08:01,222 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 9 for LOIs [2023-04-01 05:08:01,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 05:08:01,289 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 05:08:01,454 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '135#(and (<= 1 |#StackHeapBarrier|) (< (mod main_~s~0 256) (mod main_~v~0 256)) (<= (mod main_~n~0 256) (mod main_~i~0 4294967296)) (<= 0 main_~i~0) (= |#NULL.offset| 0) (= |#NULL.base| 0))' at error location [2023-04-01 05:08:01,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 05:08:01,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 05:08:01,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-04-01 05:08:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701419469] [2023-04-01 05:08:01,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 05:08:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 05:08:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 05:08:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 05:08:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-04-01 05:08:01,460 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:01,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 05:08:01,493 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-04-01 05:08:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 05:08:01,494 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-04-01 05:08:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 05:08:01,494 INFO L225 Difference]: With dead ends: 15 [2023-04-01 05:08:01,494 INFO L226 Difference]: Without dead ends: 12 [2023-04-01 05:08:01,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-04-01 05:08:01,498 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 05:08:01,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 05:08:01,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-04-01 05:08:01,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-04-01 05:08:01,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:01,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-04-01 05:08:01,505 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-04-01 05:08:01,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 05:08:01,506 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-04-01 05:08:01,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 05:08:01,506 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-04-01 05:08:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 05:08:01,506 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 05:08:01,506 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 05:08:01,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 05:08:01,712 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 05:08:01,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 05:08:01,713 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 05:08:01,713 INFO L85 PathProgramCache]: Analyzing trace with hash -59319743, now seen corresponding path program 2 times [2023-04-01 05:08:01,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 05:08:01,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254166080] [2023-04-01 05:08:01,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 05:08:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 05:08:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 05:08:01,730 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 05:08:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 05:08:01,754 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 05:08:01,754 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 05:08:01,755 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-04-01 05:08:01,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-04-01 05:08:01,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 05:08:01,759 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1] [2023-04-01 05:08:01,762 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 05:08:01,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 05:08:01 BoogieIcfgContainer [2023-04-01 05:08:01,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 05:08:01,777 INFO L158 Benchmark]: Toolchain (without parser) took 2258.93ms. Allocated memory is still 287.3MB. Free memory was 241.5MB in the beginning and 238.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 8.0GB. [2023-04-01 05:08:01,777 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 136.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 05:08:01,778 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.90ms. Allocated memory is still 287.3MB. Free memory was 241.0MB in the beginning and 231.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-01 05:08:01,778 INFO L158 Benchmark]: Boogie Preprocessor took 27.57ms. Allocated memory is still 287.3MB. Free memory was 231.0MB in the beginning and 229.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-01 05:08:01,778 INFO L158 Benchmark]: RCFGBuilder took 321.14ms. Allocated memory is still 287.3MB. Free memory was 229.4MB in the beginning and 217.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-01 05:08:01,779 INFO L158 Benchmark]: TraceAbstraction took 1733.80ms. Allocated memory is still 287.3MB. Free memory was 217.4MB in the beginning and 238.3MB in the end (delta: -21.0MB). There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 05:08:01,780 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 184.5MB. Free memory is still 136.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 171.90ms. Allocated memory is still 287.3MB. Free memory was 241.0MB in the beginning and 231.0MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.57ms. Allocated memory is still 287.3MB. Free memory was 231.0MB in the beginning and 229.4MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 321.14ms. Allocated memory is still 287.3MB. Free memory was 229.4MB in the beginning and 217.9MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 1733.80ms. Allocated memory is still 287.3MB. Free memory was 217.4MB in the beginning and 238.3MB in the end (delta: -21.0MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L5] unsigned char n = __VERIFIER_nondet_uchar(); [L6] COND FALSE !(n == 0) [L9] unsigned char v = 0; [L10] unsigned char s = 0; [L11] unsigned int i = 0; VAL [i=0, n=2, s=0, v=0] [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i VAL [i=1, n=2, s=255, v=255] [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i VAL [i=2, n=2, s=0, v=1] [L12] COND FALSE !(i < n) VAL [i=2, n=2, s=0, v=1] [L17] COND TRUE s < v VAL [i=2, n=2, s=0, v=1] [L18] reach_error() VAL [i=2, n=2, s=0, v=1] - UnprovableResult [Line: 22]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 40 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 20 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19 IncrementalHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 20 mSDtfsCounter, 19 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 7, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 35 ConstructedInterpolants, 0 QuantifiedInterpolants, 134 SizeOfPredicates, 2 NumberOfNonLiveVariables, 55 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-04-01 05:08:01,802 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...