./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/gcnr2008.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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-lit/gcnr2008.i -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 624f87877a6d808616ad34e2342211dcace52e27 ........................................................................................................................................................................................................................................................................ 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 0.1.25-9a8b2e8 [2020-10-20 01:00:52,205 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:00:52,208 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:00:52,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:00:52,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:00:52,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:00:52,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:00:52,236 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:00:52,248 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:00:52,251 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:00:52,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:00:52,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:00:52,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:00:52,260 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:00:52,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:00:52,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:00:52,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:00:52,267 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:00:52,269 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:00:52,276 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:00:52,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:00:52,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:00:52,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:00:52,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:00:52,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:00:52,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:00:52,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:00:52,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:00:52,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:00:52,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:00:52,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:00:52,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:00:52,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:00:52,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:00:52,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:00:52,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:00:52,309 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:00:52,309 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:00:52,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:00:52,310 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:00:52,311 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:00:52,312 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:00:52,347 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:00:52,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:00:52,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:00:52,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:00:52,349 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:00:52,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:00:52,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:00:52,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:00:52,351 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:00:52,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:00:52,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:00:52,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:00:52,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:00:52,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:00:52,352 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:00:52,352 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:00:52,352 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:00:52,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:00:52,353 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:00:52,353 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:00:52,353 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:00:52,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:00:52,353 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:00:52,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:00:52,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> 624f87877a6d808616ad34e2342211dcace52e27 [2020-10-20 01:00:52,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:00:52,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:00:52,587 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:00:52,589 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:00:52,590 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:00:52,591 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/gcnr2008.i [2020-10-20 01:00:52,669 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1e53cb9/5f26e72450094c55b5d6fd4fd394e7de/FLAG4e1fb183b [2020-10-20 01:00:53,121 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:00:53,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/gcnr2008.i [2020-10-20 01:00:53,128 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1e53cb9/5f26e72450094c55b5d6fd4fd394e7de/FLAG4e1fb183b [2020-10-20 01:00:53,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad1e53cb9/5f26e72450094c55b5d6fd4fd394e7de [2020-10-20 01:00:53,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:00:53,513 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:00:53,517 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:00:53,518 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:00:53,522 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:00:53,523 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,528 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815ae05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53, skipping insertion in model container [2020-10-20 01:00:53,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,538 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:00:53,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:00:53,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:00:53,818 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:00:53,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:00:53,854 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:00:53,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53 WrapperNode [2020-10-20 01:00:53,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:00:53,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:00:53,855 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:00:53,855 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:00:53,862 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:00:53,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:00:53,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:00:53,888 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:00:53,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,896 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,908 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... [2020-10-20 01:00:53,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:00:53,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:00:53,911 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:00:53,911 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:00:53,912 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:00:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:00:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:00:53,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:00:53,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:00:54,215 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:00:54,215 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 01:00:54,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:54 BoogieIcfgContainer [2020-10-20 01:00:54,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:00:54,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:00:54,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:00:54,222 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:00:54,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:00:53" (1/3) ... [2020-10-20 01:00:54,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aecf15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:00:54, skipping insertion in model container [2020-10-20 01:00:54,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:00:53" (2/3) ... [2020-10-20 01:00:54,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1aecf15c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:00:54, skipping insertion in model container [2020-10-20 01:00:54,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:54" (3/3) ... [2020-10-20 01:00:54,226 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-10-20 01:00:54,238 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:00:54,246 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:00:54,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:00:54,287 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:00:54,288 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:00:54,288 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:00:54,288 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:00:54,288 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:00:54,288 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:00:54,288 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:00:54,289 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:00:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-10-20 01:00:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 01:00:54,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:54,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:54,327 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:54,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1064143880, now seen corresponding path program 1 times [2020-10-20 01:00:54,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:54,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569247923] [2020-10-20 01:00:54,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:00:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:00:54,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569247923] [2020-10-20 01:00:54,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:00:54,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:00:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565530612] [2020-10-20 01:00:54,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:00:54,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:00:54,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:00:54,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:00:54,563 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-10-20 01:00:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:00:54,578 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2020-10-20 01:00:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:00:54,580 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 01:00:54,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:00:54,592 INFO L225 Difference]: With dead ends: 30 [2020-10-20 01:00:54,592 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 01:00:54,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:00:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 01:00:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-20 01:00:54,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 01:00:54,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2020-10-20 01:00:54,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2020-10-20 01:00:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:00:54,637 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2020-10-20 01:00:54,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:00:54,637 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2020-10-20 01:00:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-20 01:00:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:00:54,639 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:00:54,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:00:54,640 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:00:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:00:54,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1235302244, now seen corresponding path program 1 times [2020-10-20 01:00:54,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:00:54,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430031870] [2020-10-20 01:00:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:00:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:00:54,670 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:00:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 01:00:54,691 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 01:00:54,715 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 01:00:54,715 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 01:00:54,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:00:54,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:00:54 BoogieIcfgContainer [2020-10-20 01:00:54,740 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:00:54,746 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:00:54,746 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:00:54,746 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:00:54,747 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:00:54" (3/4) ... [2020-10-20 01:00:54,749 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 01:00:54,791 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:00:54,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:00:54,794 INFO L168 Benchmark]: Toolchain (without parser) took 1287.56 ms. Allocated memory was 35.1 MB in the beginning and 47.2 MB in the end (delta: 12.1 MB). Free memory was 12.8 MB in the beginning and 25.0 MB in the end (delta: -12.1 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 01:00:54,796 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 33.6 MB. Free memory was 18.8 MB in the beginning and 18.8 MB in the end (delta: 30.9 kB). Peak memory consumption was 30.9 kB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.41 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 12.0 MB in the beginning and 24.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.69 ms. Allocated memory is still 44.0 MB. Free memory was 24.4 MB in the beginning and 22.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,798 INFO L168 Benchmark]: Boogie Preprocessor took 22.42 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 21.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,800 INFO L168 Benchmark]: RCFGBuilder took 306.48 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 21.3 MB in the beginning and 19.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,800 INFO L168 Benchmark]: TraceAbstraction took 521.23 ms. Allocated memory is still 45.6 MB. Free memory was 19.1 MB in the beginning and 10.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,804 INFO L168 Benchmark]: Witness Printer took 46.03 ms. Allocated memory is still 47.2 MB. Free memory was 26.8 MB in the beginning and 25.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 01:00:54,813 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 33.6 MB. Free memory was 18.8 MB in the beginning and 18.8 MB in the end (delta: 30.9 kB). Peak memory consumption was 30.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 337.41 ms. Allocated memory was 35.1 MB in the beginning and 44.0 MB in the end (delta: 8.9 MB). Free memory was 12.0 MB in the beginning and 24.4 MB in the end (delta: -12.5 MB). Peak memory consumption was 10.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.69 ms. Allocated memory is still 44.0 MB. Free memory was 24.4 MB in the beginning and 22.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.42 ms. Allocated memory is still 44.0 MB. Free memory was 22.7 MB in the beginning and 21.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 306.48 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 21.3 MB in the beginning and 19.5 MB in the end (delta: 1.8 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 521.23 ms. Allocated memory is still 45.6 MB. Free memory was 19.1 MB in the beginning and 10.9 MB in the end (delta: 8.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. * Witness Printer took 46.03 ms. Allocated memory is still 47.2 MB. Free memory was 26.8 MB in the beginning and 25.0 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 [L26] EXPR z = w = 0 [L26] EXPR y = z = w = 0 [L26] x = y = z = w = 0 [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L18] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 23 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 49 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...