./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6b7e4344a1b47d68a491e369e16c1769051091e9 ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 04:38:36,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 04:38:36,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 04:38:36,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 04:38:36,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 04:38:36,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 04:38:36,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 04:38:36,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 04:38:36,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 04:38:36,221 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 04:38:36,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 04:38:36,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 04:38:36,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 04:38:36,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 04:38:36,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 04:38:36,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 04:38:36,243 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 04:38:36,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 04:38:36,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 04:38:36,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 04:38:36,257 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 04:38:36,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 04:38:36,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 04:38:36,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 04:38:36,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 04:38:36,275 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 04:38:36,275 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 04:38:36,277 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 04:38:36,277 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 04:38:36,279 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 04:38:36,279 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 04:38:36,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 04:38:36,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 04:38:36,285 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 04:38:36,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 04:38:36,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 04:38:36,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 04:38:36,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 04:38:36,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 04:38:36,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 04:38:36,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 04:38:36,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 04:38:36,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 04:38:36,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 04:38:36,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 04:38:36,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 04:38:36,335 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 04:38:36,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 04:38:36,336 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 04:38:36,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 04:38:36,336 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 04:38:36,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 04:38:36,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 04:38:36,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 04:38:36,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 04:38:36,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 04:38:36,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 04:38:36,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 04:38:36,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 04:38:36,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 04:38:36,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 04:38:36,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 04:38:36,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 04:38:36,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 04:38:36,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:38:36,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 04:38:36,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 04:38:36,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 04:38:36,340 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 04:38:36,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 04:38:36,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 04:38:36,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 04:38:36,341 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b7e4344a1b47d68a491e369e16c1769051091e9 [2021-08-26 04:38:36,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 04:38:36,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 04:38:36,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 04:38:36,695 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 04:38:36,696 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 04:38:36,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-08-26 04:38:36,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a92cf201/34a0a4dc65a940fab1573949b79d91e0/FLAG8dccd0942 [2021-08-26 04:38:37,267 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 04:38:37,268 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-b.c [2021-08-26 04:38:37,275 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a92cf201/34a0a4dc65a940fab1573949b79d91e0/FLAG8dccd0942 [2021-08-26 04:38:37,760 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a92cf201/34a0a4dc65a940fab1573949b79d91e0 [2021-08-26 04:38:37,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 04:38:37,783 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 04:38:37,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 04:38:37,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 04:38:37,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 04:38:37,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:37,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56e5abf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37, skipping insertion in model container [2021-08-26 04:38:37,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:37,802 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 04:38:37,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 04:38:37,917 WARN L228 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] [2021-08-26 04:38:37,920 WARN L228 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] [2021-08-26 04:38:37,922 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:38:37,930 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 04:38:37,943 WARN L228 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] [2021-08-26 04:38:37,944 WARN L228 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] [2021-08-26 04:38:37,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 04:38:37,956 INFO L208 MainTranslator]: Completed translation [2021-08-26 04:38:37,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37 WrapperNode [2021-08-26 04:38:37,957 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 04:38:37,958 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 04:38:37,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 04:38:37,959 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 04:38:37,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:37,978 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 04:38:38,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 04:38:38,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 04:38:38,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 04:38:38,009 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,009 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,021 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,029 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 04:38:38,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 04:38:38,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 04:38:38,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 04:38:38,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (1/1) ... [2021-08-26 04:38:38,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 04:38:38,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:38:38,070 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) [2021-08-26 04:38:38,100 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 [2021-08-26 04:38:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 04:38:38,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 04:38:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 04:38:38,126 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 04:38:38,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 04:38:38,313 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-26 04:38:38,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:38:38 BoogieIcfgContainer [2021-08-26 04:38:38,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 04:38:38,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 04:38:38,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 04:38:38,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 04:38:38,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 04:38:37" (1/3) ... [2021-08-26 04:38:38,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcf182a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:38:38, skipping insertion in model container [2021-08-26 04:38:38,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 04:38:37" (2/3) ... [2021-08-26 04:38:38,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fcf182a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 04:38:38, skipping insertion in model container [2021-08-26 04:38:38,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:38:38" (3/3) ... [2021-08-26 04:38:38,338 INFO L111 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-b.c [2021-08-26 04:38:38,343 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 04:38:38,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-08-26 04:38:38,420 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 04:38:38,425 INFO L339 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, mConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 04:38:38,426 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-08-26 04:38:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 04:38:38,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:38:38,442 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 04:38:38,443 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:38:38,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:38:38,448 INFO L82 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2021-08-26 04:38:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:38:38,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535559053] [2021-08-26 04:38:38,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:38:38,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:38:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:38:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:38:38,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:38:38,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535559053] [2021-08-26 04:38:38,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535559053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:38:38,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:38:38,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 04:38:38,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27887023] [2021-08-26 04:38:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 04:38:38,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:38:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 04:38:38,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:38:38,686 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:38:38,701 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2021-08-26 04:38:38,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 04:38:38,702 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 04:38:38,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:38:38,708 INFO L225 Difference]: With dead ends: 20 [2021-08-26 04:38:38,709 INFO L226 Difference]: Without dead ends: 7 [2021-08-26 04:38:38,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 04:38:38,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-08-26 04:38:38,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-08-26 04:38:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-08-26 04:38:38,738 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 6 [2021-08-26 04:38:38,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:38:38,739 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-08-26 04:38:38,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-08-26 04:38:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 04:38:38,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:38:38,740 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 04:38:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 04:38:38,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:38:38,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:38:38,744 INFO L82 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2021-08-26 04:38:38,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:38:38,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132248014] [2021-08-26 04:38:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:38:38,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:38:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:38:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:38:38,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:38:38,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132248014] [2021-08-26 04:38:38,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132248014] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 04:38:38,915 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 04:38:38,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 04:38:38,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922756685] [2021-08-26 04:38:38,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 04:38:38,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:38:38,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 04:38:38,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:38:38,920 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:38:38,934 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-08-26 04:38:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 04:38:38,935 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-26 04:38:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:38:38,937 INFO L225 Difference]: With dead ends: 11 [2021-08-26 04:38:38,937 INFO L226 Difference]: Without dead ends: 8 [2021-08-26 04:38:38,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 04:38:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-26 04:38:38,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-26 04:38:38,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-08-26 04:38:38,943 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-08-26 04:38:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:38:38,944 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-08-26 04:38:38,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:38,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-08-26 04:38:38,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-26 04:38:38,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:38:38,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-26 04:38:38,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 04:38:38,946 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:38:38,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:38:38,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2021-08-26 04:38:38,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:38:38,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462882893] [2021-08-26 04:38:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:38:38,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:38:38,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:38:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:38:39,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 04:38:39,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462882893] [2021-08-26 04:38:39,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462882893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:38:39,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179123627] [2021-08-26 04:38:39,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:38:39,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:38:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 04:38:39,065 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) [2021-08-26 04:38:39,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 04:38:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 04:38:39,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-26 04:38:39,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 04:38:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 04:38:39,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179123627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 04:38:39,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 04:38:39,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 04:38:39,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524812779] [2021-08-26 04:38:39,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 04:38:39,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 04:38:39,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 04:38:39,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-26 04:38:39,219 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 04:38:39,279 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-08-26 04:38:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 04:38:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-26 04:38:39,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 04:38:39,280 INFO L225 Difference]: With dead ends: 12 [2021-08-26 04:38:39,280 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 04:38:39,281 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-26 04:38:39,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 04:38:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 04:38:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-26 04:38:39,283 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-08-26 04:38:39,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 04:38:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-26 04:38:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 04:38:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-26 04:38:39,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 04:38:39,285 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 04:38:39,285 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-08-26 04:38:39,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 04:38:39,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 04:38:39,486 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 04:38:39,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 04:38:39,487 INFO L82 PathProgramCache]: Analyzing trace with hash 183224107, now seen corresponding path program 2 times [2021-08-26 04:38:39,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 04:38:39,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700046359] [2021-08-26 04:38:39,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 04:38:39,487 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 04:38:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:38:39,531 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 04:38:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 04:38:39,600 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 04:38:39,601 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 04:38:39,602 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:38:39,604 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 04:38:39,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 04:38:39,610 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 04:38:39,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 04:38:39 BoogieIcfgContainer [2021-08-26 04:38:39,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 04:38:39,627 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 04:38:39,627 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 04:38:39,627 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 04:38:39,627 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 04:38:38" (3/4) ... [2021-08-26 04:38:39,629 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 04:38:39,665 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 04:38:39,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 04:38:39,671 INFO L168 Benchmark]: Toolchain (without parser) took 1886.51 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 46.3 MB in the beginning and 41.2 MB in the end (delta: 5.1 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,671 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:38:39,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 172.00 ms. Allocated memory is still 60.8 MB. Free memory was 46.1 MB in the beginning and 36.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,674 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.39 ms. Allocated memory is still 60.8 MB. Free memory was 36.7 MB in the beginning and 44.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,674 INFO L168 Benchmark]: Boogie Preprocessor took 35.86 ms. Allocated memory is still 60.8 MB. Free memory was 44.5 MB in the beginning and 43.5 MB in the end (delta: 999.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 04:38:39,675 INFO L168 Benchmark]: RCFGBuilder took 276.55 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 31.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,675 INFO L168 Benchmark]: TraceAbstraction took 1310.47 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 43.3 MB in the end (delta: -12.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,675 INFO L168 Benchmark]: Witness Printer took 41.83 ms. Allocated memory is still 73.4 MB. Free memory was 43.3 MB in the beginning and 41.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 04:38:39,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 46.1 MB. Free memory was 29.0 MB in the beginning and 29.0 MB in the end (delta: 39.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 172.00 ms. Allocated memory is still 60.8 MB. Free memory was 46.1 MB in the beginning and 36.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.39 ms. Allocated memory is still 60.8 MB. Free memory was 36.7 MB in the beginning and 44.5 MB in the end (delta: -7.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.86 ms. Allocated memory is still 60.8 MB. Free memory was 44.5 MB in the beginning and 43.5 MB in the end (delta: 999.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 276.55 ms. Allocated memory is still 60.8 MB. Free memory was 43.5 MB in the beginning and 31.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1310.47 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 43.3 MB in the end (delta: -12.0 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Witness Printer took 41.83 ms. Allocated memory is still 73.4 MB. Free memory was 43.3 MB in the beginning and 41.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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; [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND TRUE i < n [L13] v = __VERIFIER_nondet_uchar() [L14] s += v [L15] ++i [L12] COND FALSE !(i < n) [L17] COND TRUE s < v [L18] reach_error() - 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 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1189.3ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 8.5ms, AutomataDifference: 131.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 0 SDslu, 9 SDs, 0 SdLazy, 11 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 40.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 21.2ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 22.5ms SsaConstructionTime, 166.9ms SatisfiabilityAnalysisTime, 354.2ms InterpolantComputationTime, 34 NumberOfCodeBlocks, 34 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 72 SizeOfPredicates, 2 NumberOfNonLiveVariables, 50 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2 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! [2021-08-26 04:38:39,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...