./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02.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.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 67768b34e7b9299b4c0862a201d7fe793c7261b3 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 00:55:36,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:55:36,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:55:36,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:55:36,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:55:36,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:55:36,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:55:36,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:55:36,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:55:36,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:55:36,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:55:36,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:55:36,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:55:36,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:55:36,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:55:36,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:55:36,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:55:36,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:55:36,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:55:36,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:55:36,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:55:36,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:55:36,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:55:36,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:55:36,446 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:55:36,446 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:55:36,446 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:55:36,447 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:55:36,449 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:55:36,450 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:55:36,450 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:55:36,451 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:55:36,452 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:55:36,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:55:36,454 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:55:36,455 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:55:36,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:55:36,456 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:55:36,456 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:55:36,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:55:36,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:55:36,465 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:55:36,506 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:55:36,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:55:36,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:55:36,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:55:36,509 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:55:36,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:55:36,510 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:55:36,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:55:36,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:55:36,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:55:36,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:55:36,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:55:36,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:55:36,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:55:36,513 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:55:36,513 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:55:36,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:55:36,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:55:36,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:55:36,514 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:55:36,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:55:36,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:55:36,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:55:36,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:55:36,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:55:36,516 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:55:36,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:55:36,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:55:36,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:55:36,516 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 -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2020-10-20 00:55:36,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:55:36,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:55:36,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:55:36,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:55:36,761 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:55:36,762 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02.i [2020-10-20 00:55:36,830 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07f0a29a/51c606ca50744febbb4d5e8085302e75/FLAG2f705f700 [2020-10-20 00:55:37,307 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:55:37,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02.i [2020-10-20 00:55:37,315 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07f0a29a/51c606ca50744febbb4d5e8085302e75/FLAG2f705f700 [2020-10-20 00:55:37,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c07f0a29a/51c606ca50744febbb4d5e8085302e75 [2020-10-20 00:55:37,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:55:37,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:55:37,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:37,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:55:37,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:55:37,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:37" (1/1) ... [2020-10-20 00:55:37,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c95629 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:37, skipping insertion in model container [2020-10-20 00:55:37,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:55:37" (1/1) ... [2020-10-20 00:55:37,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:55:37,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:55:37,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:38,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:55:38,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:55:38,044 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:55:38,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38 WrapperNode [2020-10-20 00:55:38,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:55:38,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:38,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:55:38,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:55:38,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,085 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:55:38,085 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:55:38,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:55:38,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:55:38,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,093 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,095 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,099 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (1/1) ... [2020-10-20 00:55:38,108 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:55:38,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:55:38,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:55:38,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:55:38,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (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 00:55:38,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:55:38,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:55:38,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:55:38,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:55:38,436 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:55:38,437 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-20 00:55:38,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:38 BoogieIcfgContainer [2020-10-20 00:55:38,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:55:38,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:55:38,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:55:38,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:55:38,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:55:37" (1/3) ... [2020-10-20 00:55:38,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6007c473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:38, skipping insertion in model container [2020-10-20 00:55:38,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:55:38" (2/3) ... [2020-10-20 00:55:38,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6007c473 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:55:38, skipping insertion in model container [2020-10-20 00:55:38,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:38" (3/3) ... [2020-10-20 00:55:38,447 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-10-20 00:55:38,459 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:55:38,467 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:55:38,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:55:38,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:55:38,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:55:38,500 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:55:38,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:55:38,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:55:38,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:55:38,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:55:38,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:55:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-10-20 00:55:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:38,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:38,523 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:38,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:38,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash 590808584, now seen corresponding path program 1 times [2020-10-20 00:55:38,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:38,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115100884] [2020-10-20 00:55:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:38,693 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 00:55:38,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115100884] [2020-10-20 00:55:38,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:38,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:55:38,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353221515] [2020-10-20 00:55:38,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:55:38,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:38,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:55:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:55:38,721 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 2 states. [2020-10-20 00:55:38,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:38,740 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-10-20 00:55:38,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:55:38,742 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-10-20 00:55:38,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:38,753 INFO L225 Difference]: With dead ends: 25 [2020-10-20 00:55:38,753 INFO L226 Difference]: Without dead ends: 12 [2020-10-20 00:55:38,757 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 00:55:38,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-20 00:55:38,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-20 00:55:38,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 00:55:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-20 00:55:38,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2020-10-20 00:55:38,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:38,797 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-20 00:55:38,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:55:38,798 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-20 00:55:38,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-20 00:55:38,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:38,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:38,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:55:38,799 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:38,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:38,800 INFO L82 PathProgramCache]: Analyzing trace with hash 218629621, now seen corresponding path program 1 times [2020-10-20 00:55:38,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:38,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791815149] [2020-10-20 00:55:38,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:38,989 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 00:55:38,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791815149] [2020-10-20 00:55:38,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:55:38,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:55:38,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481775740] [2020-10-20 00:55:38,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:55:38,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:38,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:55:38,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:55:38,993 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 4 states. [2020-10-20 00:55:39,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:39,023 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2020-10-20 00:55:39,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:55:39,024 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-10-20 00:55:39,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:39,025 INFO L225 Difference]: With dead ends: 22 [2020-10-20 00:55:39,025 INFO L226 Difference]: Without dead ends: 16 [2020-10-20 00:55:39,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:55:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-20 00:55:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 00:55:39,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 00:55:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-20 00:55:39,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2020-10-20 00:55:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:39,037 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-20 00:55:39,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:55:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-20 00:55:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:55:39,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:39,039 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:39,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:55:39,039 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:39,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:39,039 INFO L82 PathProgramCache]: Analyzing trace with hash 212204378, now seen corresponding path program 1 times [2020-10-20 00:55:39,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:39,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242672486] [2020-10-20 00:55:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:39,292 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 00:55:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242672486] [2020-10-20 00:55:39,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192604926] [2020-10-20 00:55:39,293 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 00:55:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:39,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 00:55:39,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:39,505 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:39,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:39,568 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 00:55:39,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:39,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-20 00:55:39,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535495410] [2020-10-20 00:55:39,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:55:39,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:55:39,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:39,572 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 12 states. [2020-10-20 00:55:39,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:39,779 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-20 00:55:39,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 00:55:39,781 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-20 00:55:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:39,785 INFO L225 Difference]: With dead ends: 32 [2020-10-20 00:55:39,785 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:55:39,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-20 00:55:39,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:55:39,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-10-20 00:55:39,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 00:55:39,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-20 00:55:39,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2020-10-20 00:55:39,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:39,797 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-20 00:55:39,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:55:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-20 00:55:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:55:39,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:39,799 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:40,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 00:55:40,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:40,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:40,014 INFO L82 PathProgramCache]: Analyzing trace with hash 2010166847, now seen corresponding path program 2 times [2020-10-20 00:55:40,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:40,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318908562] [2020-10-20 00:55:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:40,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:40,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318908562] [2020-10-20 00:55:40,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29638846] [2020-10-20 00:55:40,290 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 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 00:55:40,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:40,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 00:55:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:40,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:40,485 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-20 00:55:40,485 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:40,490 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:40,494 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:40,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:40,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:40,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2020-10-20 00:55:40,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988350820] [2020-10-20 00:55:40,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:55:40,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:40,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:55:40,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:55:40,532 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 16 states. [2020-10-20 00:55:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:40,931 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2020-10-20 00:55:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-20 00:55:40,932 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2020-10-20 00:55:40,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:40,934 INFO L225 Difference]: With dead ends: 46 [2020-10-20 00:55:40,934 INFO L226 Difference]: Without dead ends: 38 [2020-10-20 00:55:40,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-10-20 00:55:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-20 00:55:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2020-10-20 00:55:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:55:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-20 00:55:40,942 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-20 00:55:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:40,943 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-20 00:55:40,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:55:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-20 00:55:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:55:40,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:40,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:41,158 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1604742079, now seen corresponding path program 1 times [2020-10-20 00:55:41,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303745107] [2020-10-20 00:55:41,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:41,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303745107] [2020-10-20 00:55:41,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769974443] [2020-10-20 00:55:41,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 00:55:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 00:55:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:41,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:41,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-10-20 00:55:41,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117054862] [2020-10-20 00:55:41,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:55:41,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:55:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:41,302 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 8 states. [2020-10-20 00:55:41,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:41,338 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2020-10-20 00:55:41,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:55:41,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-20 00:55:41,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:41,339 INFO L225 Difference]: With dead ends: 39 [2020-10-20 00:55:41,339 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:55:41,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:55:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:55:41,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-20 00:55:41,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:55:41,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-20 00:55:41,345 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-10-20 00:55:41,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:41,345 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-20 00:55:41,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:55:41,345 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-20 00:55:41,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-20 00:55:41,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,354 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:41,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:41,567 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1338878810, now seen corresponding path program 2 times [2020-10-20 00:55:41,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:41,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591296176] [2020-10-20 00:55:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591296176] [2020-10-20 00:55:41,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82050373] [2020-10-20 00:55:41,646 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 00:55:41,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 00:55:41,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:41,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:55:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:41,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:41,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2020-10-20 00:55:41,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684437061] [2020-10-20 00:55:41,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-20 00:55:41,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 00:55:41,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:41,784 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 12 states. [2020-10-20 00:55:41,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:41,866 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2020-10-20 00:55:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:55:41,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-10-20 00:55:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:41,869 INFO L225 Difference]: With dead ends: 35 [2020-10-20 00:55:41,869 INFO L226 Difference]: Without dead ends: 25 [2020-10-20 00:55:41,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=70, Unknown=0, NotChecked=0, Total=132 [2020-10-20 00:55:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-20 00:55:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-20 00:55:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-20 00:55:41,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-10-20 00:55:41,874 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2020-10-20 00:55:41,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:41,875 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-10-20 00:55:41,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-20 00:55:41,875 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-10-20 00:55:41,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 00:55:41,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:41,876 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:42,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:42,082 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:42,083 INFO L82 PathProgramCache]: Analyzing trace with hash -2102297463, now seen corresponding path program 3 times [2020-10-20 00:55:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:42,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325579427] [2020-10-20 00:55:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 00:55:42,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325579427] [2020-10-20 00:55:42,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111732471] [2020-10-20 00:55:42,377 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:42,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 00:55:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 00:55:42,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:42,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:42,647 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[3, 2, 1] term [2020-10-20 00:55:42,648 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:42,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 00:55:42,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-20 00:55:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:42,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:42,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2020-10-20 00:55:42,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180166928] [2020-10-20 00:55:42,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-20 00:55:42,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:42,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-20 00:55:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2020-10-20 00:55:42,679 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 21 states. [2020-10-20 00:55:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:43,352 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-10-20 00:55:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 00:55:43,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-20 00:55:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:43,354 INFO L225 Difference]: With dead ends: 48 [2020-10-20 00:55:43,354 INFO L226 Difference]: Without dead ends: 40 [2020-10-20 00:55:43,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2020-10-20 00:55:43,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-20 00:55:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2020-10-20 00:55:43,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:55:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-20 00:55:43,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2020-10-20 00:55:43,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:43,367 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-20 00:55:43,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-20 00:55:43,367 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-20 00:55:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-20 00:55:43,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:43,370 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:43,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-10-20 00:55:43,584 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1422239093, now seen corresponding path program 3 times [2020-10-20 00:55:43,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:43,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927911450] [2020-10-20 00:55:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927911450] [2020-10-20 00:55:43,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190178345] [2020-10-20 00:55:43,678 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:43,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-20 00:55:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:55:43,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:43,845 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:43,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:43,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-10-20 00:55:43,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141445136] [2020-10-20 00:55:43,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-20 00:55:43,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:43,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 00:55:43,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:55:43,848 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 16 states. [2020-10-20 00:55:43,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:43,925 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-10-20 00:55:43,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 00:55:43,925 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2020-10-20 00:55:43,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:43,926 INFO L225 Difference]: With dead ends: 41 [2020-10-20 00:55:43,926 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 00:55:43,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=131, Unknown=0, NotChecked=0, Total=240 [2020-10-20 00:55:43,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 00:55:43,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-20 00:55:43,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:55:43,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-20 00:55:43,931 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 24 [2020-10-20 00:55:43,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:43,932 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-20 00:55:43,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-20 00:55:43,932 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-20 00:55:43,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-20 00:55:43,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:43,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:44,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:44,144 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:44,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash 894625264, now seen corresponding path program 4 times [2020-10-20 00:55:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:44,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542567362] [2020-10-20 00:55:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:55:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542567362] [2020-10-20 00:55:44,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575665434] [2020-10-20 00:55:44,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:44,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 00:55:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 00:55:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 00:55:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:55:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 13 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:55:44,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 00:55:44,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2020-10-20 00:55:44,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983096274] [2020-10-20 00:55:44,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-20 00:55:44,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:55:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 00:55:44,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:55:44,435 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-10-20 00:55:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:55:44,514 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-10-20 00:55:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 00:55:44,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 28 [2020-10-20 00:55:44,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:55:44,515 INFO L225 Difference]: With dead ends: 46 [2020-10-20 00:55:44,515 INFO L226 Difference]: Without dead ends: 36 [2020-10-20 00:55:44,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=212, Unknown=0, NotChecked=0, Total=380 [2020-10-20 00:55:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-20 00:55:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-20 00:55:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-20 00:55:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-20 00:55:44,521 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2020-10-20 00:55:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:55:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-20 00:55:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-20 00:55:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-20 00:55:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-20 00:55:44,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:55:44,524 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:55:44,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 00:55:44,737 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:55:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:55:44,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1614989611, now seen corresponding path program 5 times [2020-10-20 00:55:44,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:55:44,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344222351] [2020-10-20 00:55:44,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:55:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:44,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:44,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:55:44,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:55:44,795 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:55:44,795 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:55:44,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-20 00:55:44,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:55:44 BoogieIcfgContainer [2020-10-20 00:55:44,835 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:55:44,835 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:55:44,836 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:55:44,836 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:55:44,836 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:55:38" (3/4) ... [2020-10-20 00:55:44,839 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:55:44,904 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:55:44,905 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:55:44,908 INFO L168 Benchmark]: Toolchain (without parser) took 7202.24 ms. Allocated memory was 35.7 MB in the beginning and 67.1 MB in the end (delta: 31.5 MB). Free memory was 16.1 MB in the beginning and 34.6 MB in the end (delta: -18.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,909 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 34.1 MB. Free memory was 10.2 MB in the beginning and 10.1 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,910 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.08 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.1 MB in the beginning and 25.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,911 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.50 ms. Allocated memory is still 44.0 MB. Free memory was 25.6 MB in the beginning and 23.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,917 INFO L168 Benchmark]: Boogie Preprocessor took 23.23 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 22.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,921 INFO L168 Benchmark]: RCFGBuilder took 329.60 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 22.6 MB in the beginning and 22.1 MB in the end (delta: 423.8 kB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,921 INFO L168 Benchmark]: TraceAbstraction took 6395.33 ms. Allocated memory was 45.6 MB in the beginning and 67.1 MB in the end (delta: 21.5 MB). Free memory was 21.7 MB in the beginning and 37.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,922 INFO L168 Benchmark]: Witness Printer took 69.27 ms. Allocated memory is still 67.1 MB. Free memory was 37.7 MB in the beginning and 34.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:55:44,929 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 34.1 MB. Free memory was 10.2 MB in the beginning and 10.1 MB in the end (delta: 45.4 kB). Peak memory consumption was 45.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 334.08 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.1 MB in the beginning and 25.6 MB in the end (delta: -10.5 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 39.50 ms. Allocated memory is still 44.0 MB. Free memory was 25.6 MB in the beginning and 23.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 23.23 ms. Allocated memory is still 44.0 MB. Free memory was 23.8 MB in the beginning and 22.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 329.60 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 22.6 MB in the beginning and 22.1 MB in the end (delta: 423.8 kB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 6395.33 ms. Allocated memory was 45.6 MB in the beginning and 67.1 MB in the end (delta: 21.5 MB). Free memory was 21.7 MB in the beginning and 37.7 MB in the end (delta: -16.0 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. * Witness Printer took 69.27 ms. Allocated memory is still 67.1 MB. Free memory was 37.7 MB in the beginning and 34.6 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 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, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i