./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_b2_o3.c --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/recursive-simple/id_b2_o3.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 6d9304edeab15e85170ca5853f26517d34908a3d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:48:05,297 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:48:05,300 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:48:05,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:48:05,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:48:05,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:48:05,327 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:48:05,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:48:05,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:48:05,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:48:05,333 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:48:05,334 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:48:05,335 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:48:05,336 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:48:05,338 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:48:05,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:48:05,341 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:48:05,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:48:05,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:48:05,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:48:05,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:48:05,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:48:05,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:48:05,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:48:05,369 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:48:05,370 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:48:05,370 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:48:05,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:48:05,373 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:48:05,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:48:05,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:48:05,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:48:05,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:48:05,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:48:05,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:48:05,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:48:05,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:48:05,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:48:05,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:48:05,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:48:05,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:48:05,384 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:48:05,439 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:48:05,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:48:05,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:48:05,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:48:05,444 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:48:05,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:48:05,445 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:48:05,445 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:48:05,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:48:05,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:48:05,446 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:48:05,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:48:05,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:48:05,447 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:48:05,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:48:05,448 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:48:05,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:48:05,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:48:05,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:48:05,449 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:48:05,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:48:05,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:48:05,450 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:48:05,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:48:05,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:48:05,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:48:05,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:48:05,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:48:05,451 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:48:05,452 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 -> 6d9304edeab15e85170ca5853f26517d34908a3d [2020-10-20 01:48:05,723 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:48:05,741 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:48:05,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:48:05,750 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:48:05,751 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:48:05,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_b2_o3.c [2020-10-20 01:48:05,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6183b21c7/694f7603b829437ba34f3076522178a9/FLAG8655ebe8c [2020-10-20 01:48:06,363 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:48:06,364 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_b2_o3.c [2020-10-20 01:48:06,369 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6183b21c7/694f7603b829437ba34f3076522178a9/FLAG8655ebe8c [2020-10-20 01:48:06,751 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6183b21c7/694f7603b829437ba34f3076522178a9 [2020-10-20 01:48:06,755 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:48:06,762 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:48:06,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:06,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:48:06,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:48:06,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:06" (1/1) ... [2020-10-20 01:48:06,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@364be2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:06, skipping insertion in model container [2020-10-20 01:48:06,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:48:06" (1/1) ... [2020-10-20 01:48:06,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:48:06,799 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:48:06,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:07,011 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:48:07,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:48:07,044 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:48:07,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07 WrapperNode [2020-10-20 01:48:07,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:48:07,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:07,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:48:07,047 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:48:07,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:48:07,080 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:48:07,080 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:48:07,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:48:07,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,094 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (1/1) ... [2020-10-20 01:48:07,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:48:07,099 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:48:07,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:48:07,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:48:07,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (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 01:48:07,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:48:07,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:48:07,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:48:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-20 01:48:07,169 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-20 01:48:07,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:48:07,370 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:48:07,378 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 01:48:07,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:07 BoogieIcfgContainer [2020-10-20 01:48:07,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:48:07,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:48:07,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:48:07,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:48:07,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:48:06" (1/3) ... [2020-10-20 01:48:07,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d1116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:07, skipping insertion in model container [2020-10-20 01:48:07,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:48:07" (2/3) ... [2020-10-20 01:48:07,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9d1116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:48:07, skipping insertion in model container [2020-10-20 01:48:07,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:07" (3/3) ... [2020-10-20 01:48:07,390 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-10-20 01:48:07,405 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:48:07,415 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 01:48:07,438 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 01:48:07,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:48:07,471 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:48:07,471 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:48:07,472 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:48:07,472 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:48:07,472 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:48:07,473 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:48:07,473 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:48:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-10-20 01:48:07,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:48:07,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:07,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:07,501 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:07,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:07,509 INFO L82 PathProgramCache]: Analyzing trace with hash -948071546, now seen corresponding path program 1 times [2020-10-20 01:48:07,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:07,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625608448] [2020-10-20 01:48:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:07,790 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 01:48:07,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625608448] [2020-10-20 01:48:07,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:48:07,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:48:07,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191157684] [2020-10-20 01:48:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:07,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:07,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:07,836 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2020-10-20 01:48:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:07,902 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-20 01:48:07,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:07,904 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:48:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:07,916 INFO L225 Difference]: With dead ends: 30 [2020-10-20 01:48:07,916 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 01:48:07,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 01:48:07,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 01:48:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 01:48:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-20 01:48:07,975 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-20 01:48:07,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:07,976 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-20 01:48:07,976 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:07,976 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-20 01:48:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 01:48:07,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:07,979 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:07,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:48:07,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:07,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1034741369, now seen corresponding path program 1 times [2020-10-20 01:48:07,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:07,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086375506] [2020-10-20 01:48:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:08,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086375506] [2020-10-20 01:48:08,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:48:08,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:48:08,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123205959] [2020-10-20 01:48:08,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:08,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:08,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:08,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:08,242 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 5 states. [2020-10-20 01:48:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:08,274 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-20 01:48:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:08,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-20 01:48:08,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:08,276 INFO L225 Difference]: With dead ends: 28 [2020-10-20 01:48:08,276 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:48:08,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:48:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:48:08,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-10-20 01:48:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-10-20 01:48:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-10-20 01:48:08,284 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 17 [2020-10-20 01:48:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:08,284 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-10-20 01:48:08,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-10-20 01:48:08,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 01:48:08,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:08,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:08,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:48:08,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:08,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:08,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1063370520, now seen corresponding path program 1 times [2020-10-20 01:48:08,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:08,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383611008] [2020-10-20 01:48:08,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:08,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383611008] [2020-10-20 01:48:08,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957005594] [2020-10-20 01:48:08,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:08,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 01:48:08,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-20 01:48:08,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:08,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 01:48:08,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366862] [2020-10-20 01:48:08,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:48:08,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:08,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:48:08,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-20 01:48:08,611 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 9 states. [2020-10-20 01:48:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:08,669 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 01:48:08,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:48:08,670 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 17 [2020-10-20 01:48:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:08,671 INFO L225 Difference]: With dead ends: 24 [2020-10-20 01:48:08,671 INFO L226 Difference]: Without dead ends: 20 [2020-10-20 01:48:08,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:48:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-20 01:48:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-10-20 01:48:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:48:08,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-20 01:48:08,677 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 17 [2020-10-20 01:48:08,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-20 01:48:08,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:48:08,678 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-20 01:48:08,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:48:08,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:08,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:08,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:48:08,894 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:08,894 INFO L82 PathProgramCache]: Analyzing trace with hash 758694231, now seen corresponding path program 1 times [2020-10-20 01:48:08,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:08,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827129102] [2020-10-20 01:48:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:08,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,133 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:09,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827129102] [2020-10-20 01:48:09,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489923289] [2020-10-20 01:48:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 01:48:09,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 01:48:09,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:48:09,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2020-10-20 01:48:09,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214989650] [2020-10-20 01:48:09,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:09,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:09,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:09,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:09,270 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-10-20 01:48:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:09,286 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-10-20 01:48:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:09,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-20 01:48:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:09,288 INFO L225 Difference]: With dead ends: 26 [2020-10-20 01:48:09,289 INFO L226 Difference]: Without dead ends: 22 [2020-10-20 01:48:09,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-20 01:48:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-20 01:48:09,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-10-20 01:48:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 01:48:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-10-20 01:48:09,294 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 24 [2020-10-20 01:48:09,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:09,295 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-10-20 01:48:09,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:09,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-10-20 01:48:09,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 01:48:09,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:09,297 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:09,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:09,510 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:09,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:09,510 INFO L82 PathProgramCache]: Analyzing trace with hash 787323382, now seen corresponding path program 2 times [2020-10-20 01:48:09,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:09,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120561795] [2020-10-20 01:48:09,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:09,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:09,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:09,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:09,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120561795] [2020-10-20 01:48:09,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876305891] [2020-10-20 01:48:09,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:09,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 01:48:09,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:09,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-20 01:48:09,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:09,935 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 01:48:09,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:48:09,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 01:48:09,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600201063] [2020-10-20 01:48:09,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 01:48:09,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:09,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 01:48:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-20 01:48:09,940 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 12 states. [2020-10-20 01:48:10,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:10,048 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-20 01:48:10,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 01:48:10,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-20 01:48:10,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:10,050 INFO L225 Difference]: With dead ends: 38 [2020-10-20 01:48:10,050 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 01:48:10,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:10,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 01:48:10,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-10-20 01:48:10,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 01:48:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-10-20 01:48:10,057 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 24 [2020-10-20 01:48:10,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:10,058 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-10-20 01:48:10,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 01:48:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-10-20 01:48:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-20 01:48:10,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:48:10,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:48:10,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:10,274 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:48:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:48:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash 621895688, now seen corresponding path program 3 times [2020-10-20 01:48:10,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:48:10,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437572113] [2020-10-20 01:48:10,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:48:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:10,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:10,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:10,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:10,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:10,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-20 01:48:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:48:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 01:48:10,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437572113] [2020-10-20 01:48:10,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014706809] [2020-10-20 01:48:10,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:10,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-20 01:48:10,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 01:48:10,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 01:48:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:48:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-20 01:48:10,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 01:48:10,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2020-10-20 01:48:10,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523577992] [2020-10-20 01:48:10,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:48:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:48:10,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:48:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:10,650 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-10-20 01:48:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:48:10,669 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-20 01:48:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 01:48:10,670 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-20 01:48:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:48:10,670 INFO L225 Difference]: With dead ends: 24 [2020-10-20 01:48:10,671 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:48:10,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-20 01:48:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:48:10,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:48:10,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:48:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:48:10,672 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-10-20 01:48:10,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:48:10,673 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:48:10,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:48:10,673 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:48:10,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:48:10,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:48:10,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:48:10,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:48:10,899 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:48:10,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:48:10,899 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:48:10,900 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-10-20 01:48:10,900 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-20 01:48:10,900 INFO L274 CegarLoopResult]: For program point L16(lines 16 18) no Hoare annotation was computed. [2020-10-20 01:48:10,900 INFO L277 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-10-20 01:48:10,900 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-20 01:48:10,900 INFO L274 CegarLoopResult]: For program point L13(lines 13 19) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point idFINAL(lines 6 11) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point idEXIT(lines 6 11) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L277 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: true [2020-10-20 01:48:10,901 INFO L277 CegarLoopResult]: At program point idENTRY(lines 6 11) the Hoare annotation is: true [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-10-20 01:48:10,901 INFO L274 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-10-20 01:48:10,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:48:10 BoogieIcfgContainer [2020-10-20 01:48:10,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:48:10,908 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:48:10,908 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:48:10,908 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:48:10,909 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:48:07" (3/4) ... [2020-10-20 01:48:10,913 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:48:10,921 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-10-20 01:48:10,929 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-10-20 01:48:10,929 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-20 01:48:10,930 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:48:10,930 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:48:10,982 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:48:10,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:48:10,985 INFO L168 Benchmark]: Toolchain (without parser) took 4226.91 ms. Allocated memory was 42.5 MB in the beginning and 54.5 MB in the end (delta: 12.1 MB). Free memory was 22.8 MB in the beginning and 30.7 MB in the end (delta: -7.9 MB). Peak memory consumption was 4.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,986 INFO L168 Benchmark]: CDTParser took 0.95 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,987 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.94 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,988 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.78 ms. Allocated memory is still 43.0 MB. Free memory was 23.7 MB in the beginning and 22.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,988 INFO L168 Benchmark]: Boogie Preprocessor took 18.67 ms. Allocated memory is still 43.0 MB. Free memory was 22.0 MB in the beginning and 20.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,989 INFO L168 Benchmark]: RCFGBuilder took 281.58 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 20.9 MB in the beginning and 27.9 MB in the end (delta: -7.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,990 INFO L168 Benchmark]: TraceAbstraction took 3525.70 ms. Allocated memory was 45.6 MB in the beginning and 54.5 MB in the end (delta: 8.9 MB). Free memory was 27.4 MB in the beginning and 33.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,990 INFO L168 Benchmark]: Witness Printer took 74.24 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 30.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:48:10,994 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.95 ms. Allocated memory is still 32.0 MB. Free memory was 11.1 MB in the beginning and 11.0 MB in the end (delta: 47.6 kB). Peak memory consumption was 47.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 281.94 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.7 MB in the end (delta: -1.8 MB). Peak memory consumption was 13.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 33.78 ms. Allocated memory is still 43.0 MB. Free memory was 23.7 MB in the beginning and 22.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 18.67 ms. Allocated memory is still 43.0 MB. Free memory was 22.0 MB in the beginning and 20.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 281.58 ms. Allocated memory was 43.0 MB in the beginning and 45.6 MB in the end (delta: 2.6 MB). Free memory was 20.9 MB in the beginning and 27.9 MB in the end (delta: -7.0 MB). Peak memory consumption was 11.7 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3525.70 ms. Allocated memory was 45.6 MB in the beginning and 54.5 MB in the end (delta: 8.9 MB). Free memory was 27.4 MB in the beginning and 33.6 MB in the end (delta: -6.2 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. * Witness Printer took 74.24 ms. Allocated memory is still 54.5 MB. Free memory was 33.6 MB in the beginning and 30.7 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 11 SDslu, 372 SDs, 0 SdLazy, 123 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 176 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=5, 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, 6 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 3 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 219 NumberOfCodeBlocks, 205 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 14441 SizeOfPredicates, 8 NumberOfNonLiveVariables, 294 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 102/138 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 correct! Received shutdown request...