./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.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/loops/sum01_bug02_sum01_bug02_base.case.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 dfd48abfacd60a3a4485060da29ebb446d23ac13 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 00:55:39,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:39,314 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:39,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:39,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:39,362 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:39,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:39,368 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:39,370 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:39,374 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:39,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:39,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:39,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:39,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:39,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:39,383 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:39,385 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:39,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:39,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:39,395 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:39,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:39,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:39,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:39,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:39,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:39,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:39,413 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:39,414 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:39,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:39,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:39,416 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:39,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:39,417 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:39,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:39,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:39,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:39,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:39,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:39,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:39,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:39,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:39,423 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:39,468 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:39,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:39,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:39,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:39,470 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:39,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:39,471 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:39,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:39,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:39,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:39,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:39,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:39,472 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:39,472 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:39,472 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:39,473 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:39,473 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:39,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:39,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:39,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:39,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:39,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:39,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:39,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:39,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:39,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:39,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:39,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:39,477 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:39,477 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 -> dfd48abfacd60a3a4485060da29ebb446d23ac13 [2020-10-20 00:55:39,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:39,688 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:39,691 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:39,693 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:39,693 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:39,694 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-20 00:55:39,752 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806175801/d8d960516f5345819c19c7eb16070914/FLAGd3737dadd [2020-10-20 00:55:40,240 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:40,241 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2020-10-20 00:55:40,246 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806175801/d8d960516f5345819c19c7eb16070914/FLAGd3737dadd [2020-10-20 00:55:40,673 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/806175801/d8d960516f5345819c19c7eb16070914 [2020-10-20 00:55:40,676 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:40,683 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:40,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:40,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:40,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:40,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2936de78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40, skipping insertion in model container [2020-10-20 00:55:40,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,699 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:40,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:40,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:40,920 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:40,937 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:40,955 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:40,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40 WrapperNode [2020-10-20 00:55:40,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:40,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:40,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:40,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:40,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,988 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:40,989 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:40,989 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:40,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:40,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,997 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:40,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:41,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:41,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:41,006 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (1/1) ... [2020-10-20 00:55:41,008 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:41,009 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:41,009 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:41,009 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:41,010 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (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 00:55:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:41,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:41,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:41,275 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:41,275 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:41 BoogieIcfgContainer [2020-10-20 00:55:41,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:41,278 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:41,278 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:41,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:41,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:40" (1/3) ... [2020-10-20 00:55:41,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d58bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:41, skipping insertion in model container [2020-10-20 00:55:41,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:40" (2/3) ... [2020-10-20 00:55:41,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57d58bc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:41, skipping insertion in model container [2020-10-20 00:55:41,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:41" (3/3) ... [2020-10-20 00:55:41,285 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-10-20 00:55:41,296 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:41,303 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:41,317 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:41,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:41,349 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:41,349 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:41,350 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:41,350 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:41,350 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:41,350 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:41,350 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-10-20 00:55:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:41,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,378 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,384 INFO L82 PathProgramCache]: Analyzing trace with hash 531641672, now seen corresponding path program 1 times [2020-10-20 00:55:41,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482613167] [2020-10-20 00:55:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,532 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 00:55:41,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482613167] [2020-10-20 00:55:41,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:41,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:41,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65250853] [2020-10-20 00:55:41,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:41,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:41,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:41,556 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-10-20 00:55:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:41,572 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2020-10-20 00:55:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:41,574 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:41,592 INFO L225 Difference]: With dead ends: 24 [2020-10-20 00:55:41,593 INFO L226 Difference]: Without dead ends: 11 [2020-10-20 00:55:41,596 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 00:55:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-10-20 00:55:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 00:55:41,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 00:55:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-10-20 00:55:41,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-10-20 00:55:41,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:41,624 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-10-20 00:55:41,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:41,624 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-10-20 00:55:41,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:41,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,625 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:41,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,626 INFO L82 PathProgramCache]: Analyzing trace with hash 216721011, now seen corresponding path program 1 times [2020-10-20 00:55:41,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287745521] [2020-10-20 00:55:41,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,702 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 00:55:41,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287745521] [2020-10-20 00:55:41,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:41,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:55:41,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711847002] [2020-10-20 00:55:41,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:41,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:41,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:41,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:41,707 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 4 states. [2020-10-20 00:55:41,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:41,741 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2020-10-20 00:55:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:41,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 00:55:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:41,742 INFO L225 Difference]: With dead ends: 18 [2020-10-20 00:55:41,742 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:55:41,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:41,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:55:41,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:55:41,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:55:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:55:41,748 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:55:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:41,748 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:55:41,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:41,749 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:55:41,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:41,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:41,750 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1820060357, now seen corresponding path program 1 times [2020-10-20 00:55:41,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474073997] [2020-10-20 00:55:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474073997] [2020-10-20 00:55:41,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:41,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 00:55:41,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447972171] [2020-10-20 00:55:41,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 00:55:41,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:41,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 00:55:41,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:41,789 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-20 00:55:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:41,805 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-20 00:55:41,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:55:41,806 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-10-20 00:55:41,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:41,807 INFO L225 Difference]: With dead ends: 23 [2020-10-20 00:55:41,807 INFO L226 Difference]: Without dead ends: 14 [2020-10-20 00:55:41,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 00:55:41,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-20 00:55:41,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-20 00:55:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-20 00:55:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-20 00:55:41,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-10-20 00:55:41,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:41,820 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-20 00:55:41,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 00:55:41,820 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-20 00:55:41,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:55:41,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,821 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:55:41,822 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1665560313, now seen corresponding path program 1 times [2020-10-20 00:55:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623423] [2020-10-20 00:55:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623423] [2020-10-20 00:55:42,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254301815] [2020-10-20 00:55:42,012 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 00:55:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:42,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:55:42,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:42,195 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:42,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:42,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:42,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-10-20 00:55:42,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25974373] [2020-10-20 00:55:42,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 00:55:42,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:42,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 00:55:42,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-20 00:55:42,239 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 11 states. [2020-10-20 00:55:42,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:42,360 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-10-20 00:55:42,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:55:42,360 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-20 00:55:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:42,361 INFO L225 Difference]: With dead ends: 21 [2020-10-20 00:55:42,361 INFO L226 Difference]: Without dead ends: 15 [2020-10-20 00:55:42,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:55:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-20 00:55:42,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-20 00:55:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-20 00:55:42,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-20 00:55:42,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2020-10-20 00:55:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:42,372 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-20 00:55:42,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 00:55:42,372 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-20 00:55:42,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:55:42,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:42,373 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:42,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:42,585 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash 425228021, now seen corresponding path program 1 times [2020-10-20 00:55:42,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:42,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071896737] [2020-10-20 00:55:42,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071896737] [2020-10-20 00:55:42,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157119436] [2020-10-20 00:55:42,642 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 00:55:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:42,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:55:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:42,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:42,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:42,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-20 00:55:42,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64347541] [2020-10-20 00:55:42,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:55:42,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:42,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:55:42,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:42,703 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 5 states. [2020-10-20 00:55:42,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:42,726 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-10-20 00:55:42,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:42,726 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-20 00:55:42,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:42,727 INFO L225 Difference]: With dead ends: 26 [2020-10-20 00:55:42,727 INFO L226 Difference]: Without dead ends: 17 [2020-10-20 00:55:42,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:42,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-20 00:55:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-10-20 00:55:42,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:55:42,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-20 00:55:42,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2020-10-20 00:55:42,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:42,732 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-20 00:55:42,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:55:42,732 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-20 00:55:42,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:55:42,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:42,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:42,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:42,944 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:42,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:42,944 INFO L82 PathProgramCache]: Analyzing trace with hash -384118605, now seen corresponding path program 2 times [2020-10-20 00:55:42,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:42,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848357461] [2020-10-20 00:55:42,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:42,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:43,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848357461] [2020-10-20 00:55:43,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992536126] [2020-10-20 00:55:43,114 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 00:55:43,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:43,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:43,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:55:43,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:43,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:43,275 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-20 00:55:43,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:43,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:43,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:43,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2020-10-20 00:55:43,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489121392] [2020-10-20 00:55:43,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-20 00:55:43,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:43,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 00:55:43,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:55:43,305 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 14 states. [2020-10-20 00:55:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:43,546 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-10-20 00:55:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 00:55:43,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2020-10-20 00:55:43,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:43,548 INFO L225 Difference]: With dead ends: 29 [2020-10-20 00:55:43,548 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:55:43,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:55:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:55:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 00:55:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:43,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-20 00:55:43,553 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 14 [2020-10-20 00:55:43,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:43,553 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-20 00:55:43,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-20 00:55:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-20 00:55:43,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 00:55:43,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:43,554 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:43,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:43,764 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:43,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:43,764 INFO L82 PathProgramCache]: Analyzing trace with hash -9370885, now seen corresponding path program 2 times [2020-10-20 00:55:43,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:43,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494880805] [2020-10-20 00:55:43,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494880805] [2020-10-20 00:55:43,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879352180] [2020-10-20 00:55:43,803 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 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 00:55:43,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:43,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:43,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 00:55:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:43,873 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:43,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-20 00:55:43,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399435883] [2020-10-20 00:55:43,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:55:43,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:43,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:55:43,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:43,877 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-20 00:55:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:43,915 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-20 00:55:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:55:43,918 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-20 00:55:43,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:43,918 INFO L225 Difference]: With dead ends: 30 [2020-10-20 00:55:43,918 INFO L226 Difference]: Without dead ends: 21 [2020-10-20 00:55:43,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:55:43,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-20 00:55:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-20 00:55:43,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-10-20 00:55:43,927 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2020-10-20 00:55:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:43,928 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-10-20 00:55:43,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:55:43,928 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-10-20 00:55:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:55:43,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:43,929 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:44,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:44,142 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:44,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:44,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2113949387, now seen corresponding path program 3 times [2020-10-20 00:55:44,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:44,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473777623] [2020-10-20 00:55:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:44,159 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:44,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:44,207 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:55:44,207 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:55:44,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-20 00:55:44,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:44 BoogieIcfgContainer [2020-10-20 00:55:44,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:44,261 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:44,261 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:44,261 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:44,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:41" (3/4) ... [2020-10-20 00:55:44,264 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:55:44,330 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:44,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:44,333 INFO L168 Benchmark]: Toolchain (without parser) took 3654.47 ms. Allocated memory was 43.0 MB in the beginning and 53.5 MB in the end (delta: 10.5 MB). Free memory was 22.8 MB in the beginning and 32.6 MB in the end (delta: -9.8 MB). Peak memory consumption was 726.6 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,334 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 32.5 MB. Free memory was 11.5 MB in the beginning and 11.5 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,335 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.30 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.3 MB in the end (delta: -1.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.18 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,336 INFO L168 Benchmark]: Boogie Preprocessor took 19.39 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 20.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,337 INFO L168 Benchmark]: RCFGBuilder took 268.57 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 20.2 MB in the beginning and 25.2 MB in the end (delta: -5.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,337 INFO L168 Benchmark]: TraceAbstraction took 2982.37 ms. Allocated memory was 45.1 MB in the beginning and 53.5 MB in the end (delta: 8.4 MB). Free memory was 24.8 MB in the beginning and 35.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,338 INFO L168 Benchmark]: Witness Printer took 69.44 ms. Allocated memory is still 53.5 MB. Free memory was 35.3 MB in the beginning and 32.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 32.5 MB. Free memory was 11.5 MB in the beginning and 11.5 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 272.30 ms. Allocated memory was 43.0 MB in the beginning and 43.5 MB in the end (delta: 524.3 kB). Free memory was 21.9 MB in the beginning and 23.3 MB in the end (delta: -1.3 MB). Peak memory consumption was 11.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 32.18 ms. Allocated memory is still 43.5 MB. Free memory was 23.1 MB in the beginning and 21.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 19.39 ms. Allocated memory is still 43.5 MB. Free memory was 21.5 MB in the beginning and 20.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 268.57 ms. Allocated memory was 43.5 MB in the beginning and 45.1 MB in the end (delta: 1.6 MB). Free memory was 20.2 MB in the beginning and 25.2 MB in the end (delta: -5.0 MB). Peak memory consumption was 10.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2982.37 ms. Allocated memory was 45.1 MB in the beginning and 53.5 MB in the end (delta: 8.4 MB). Free memory was 24.8 MB in the beginning and 35.3 MB in the end (delta: -10.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 14.3 GB. * Witness Printer took 69.44 ms. Allocated memory is still 53.5 MB. Free memory was 35.3 MB in the beginning and 32.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 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: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sum01_bug02_sum01_bug02_base.case.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 27 SDslu, 109 SDs, 0 SdLazy, 179 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 95 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=6, 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, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 6253 SizeOfPredicates, 12 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 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...