./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/bhmr2007.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 54858612 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/bhmr2007.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 ad9e151ff8328164b10bed0ca90425954d296eb8 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-5485861 [2020-10-25 22:22:33,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-25 22:22:33,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-25 22:22:33,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-25 22:22:33,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-25 22:22:33,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-25 22:22:33,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-25 22:22:33,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-25 22:22:33,353 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-25 22:22:33,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-25 22:22:33,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-25 22:22:33,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-25 22:22:33,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-25 22:22:33,362 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-25 22:22:33,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-25 22:22:33,370 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-25 22:22:33,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-25 22:22:33,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-25 22:22:33,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-25 22:22:33,382 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-25 22:22:33,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-25 22:22:33,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-25 22:22:33,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-25 22:22:33,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-25 22:22:33,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-25 22:22:33,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-25 22:22:33,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-25 22:22:33,409 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-25 22:22:33,410 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-25 22:22:33,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-25 22:22:33,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-25 22:22:33,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-25 22:22:33,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-25 22:22:33,415 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-25 22:22:33,418 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-25 22:22:33,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-25 22:22:33,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-25 22:22:33,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-25 22:22:33,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-25 22:22:33,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-25 22:22:33,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-25 22:22:33,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-25 22:22:33,492 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-25 22:22:33,492 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-25 22:22:33,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-25 22:22:33,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-25 22:22:33,497 INFO L138 SettingsManager]: * Use SBE=true [2020-10-25 22:22:33,497 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-25 22:22:33,497 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-25 22:22:33,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-25 22:22:33,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-25 22:22:33,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-25 22:22:33,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-25 22:22:33,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-25 22:22:33,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-25 22:22:33,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-25 22:22:33,500 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-25 22:22:33,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-25 22:22:33,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-25 22:22:33,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-25 22:22:33,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-25 22:22:33,501 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-25 22:22:33,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-25 22:22:33,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-25 22:22:33,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-25 22:22:33,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-25 22:22:33,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-25 22:22:33,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-25 22:22:33,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-25 22:22:33,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-25 22:22:33,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-25 22:22:33,503 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad9e151ff8328164b10bed0ca90425954d296eb8 [2020-10-25 22:22:33,948 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-25 22:22:33,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-25 22:22:33,995 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-25 22:22:33,996 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-25 22:22:33,998 INFO L275 PluginConnector]: CDTParser initialized [2020-10-25 22:22:33,999 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-lit/bhmr2007.i [2020-10-25 22:22:34,093 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a3a99c/b737503def7b4d3eb9e41488f5661faf/FLAG8b41ee542 [2020-10-25 22:22:34,708 INFO L306 CDTParser]: Found 1 translation units. [2020-10-25 22:22:34,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-lit/bhmr2007.i [2020-10-25 22:22:34,718 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a3a99c/b737503def7b4d3eb9e41488f5661faf/FLAG8b41ee542 [2020-10-25 22:22:35,070 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df5a3a99c/b737503def7b4d3eb9e41488f5661faf [2020-10-25 22:22:35,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-25 22:22:35,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-25 22:22:35,082 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-25 22:22:35,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-25 22:22:35,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-25 22:22:35,088 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b5976ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35, skipping insertion in model container [2020-10-25 22:22:35,091 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-25 22:22:35,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-25 22:22:35,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:22:35,310 INFO L203 MainTranslator]: Completed pre-run [2020-10-25 22:22:35,330 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-25 22:22:35,348 INFO L208 MainTranslator]: Completed translation [2020-10-25 22:22:35,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35 WrapperNode [2020-10-25 22:22:35,350 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-25 22:22:35,351 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-25 22:22:35,352 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-25 22:22:35,352 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-25 22:22:35,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-25 22:22:35,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-25 22:22:35,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-25 22:22:35,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-25 22:22:35,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,412 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (1/1) ... [2020-10-25 22:22:35,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-25 22:22:35,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-25 22:22:35,426 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-25 22:22:35,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-25 22:22:35,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (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 [2020-10-25 22:22:35,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-25 22:22:35,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-25 22:22:35,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-25 22:22:35,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-25 22:22:35,876 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-25 22:22:35,877 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-25 22:22:35,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:35 BoogieIcfgContainer [2020-10-25 22:22:35,879 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-25 22:22:35,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-25 22:22:35,881 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-25 22:22:35,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-25 22:22:35,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.10 10:22:35" (1/3) ... [2020-10-25 22:22:35,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569a651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:22:35, skipping insertion in model container [2020-10-25 22:22:35,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.10 10:22:35" (2/3) ... [2020-10-25 22:22:35,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@569a651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.10 10:22:35, skipping insertion in model container [2020-10-25 22:22:35,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:35" (3/3) ... [2020-10-25 22:22:35,889 INFO L111 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-10-25 22:22:35,902 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-25 22:22:35,908 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-25 22:22:35,923 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-25 22:22:35,951 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-25 22:22:35,951 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-25 22:22:35,952 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-25 22:22:35,952 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-25 22:22:35,952 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-25 22:22:35,952 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-25 22:22:35,952 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-25 22:22:35,952 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-25 22:22:35,968 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-25 22:22:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:22:35,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:35,975 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:35,975 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:35,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:35,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1653287849, now seen corresponding path program 1 times [2020-10-25 22:22:35,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:35,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857161631] [2020-10-25 22:22:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:36,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857161631] [2020-10-25 22:22:36,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:22:36,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-25 22:22:36,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956286633] [2020-10-25 22:22:36,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-25 22:22:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:36,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-25 22:22:36,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-25 22:22:36,247 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 2 states. [2020-10-25 22:22:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:36,270 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-10-25 22:22:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-25 22:22:36,272 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-25 22:22:36,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:36,282 INFO L225 Difference]: With dead ends: 27 [2020-10-25 22:22:36,283 INFO L226 Difference]: Without dead ends: 12 [2020-10-25 22:22:36,288 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 [2020-10-25 22:22:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-25 22:22:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-25 22:22:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-25 22:22:36,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-25 22:22:36,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2020-10-25 22:22:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:36,339 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-25 22:22:36,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-25 22:22:36,340 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-25 22:22:36,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-25 22:22:36,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:36,342 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:36,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-25 22:22:36,342 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1338367188, now seen corresponding path program 1 times [2020-10-25 22:22:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:36,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633153321] [2020-10-25 22:22:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:36,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:36,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:36,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633153321] [2020-10-25 22:22:36,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-25 22:22:36,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-25 22:22:36,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243541387] [2020-10-25 22:22:36,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-25 22:22:36,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:36,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-25 22:22:36,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-25 22:22:36,614 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 6 states. [2020-10-25 22:22:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:36,701 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-10-25 22:22:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-25 22:22:36,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-10-25 22:22:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:36,704 INFO L225 Difference]: With dead ends: 20 [2020-10-25 22:22:36,704 INFO L226 Difference]: Without dead ends: 14 [2020-10-25 22:22:36,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-25 22:22:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-25 22:22:36,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-25 22:22:36,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-25 22:22:36,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-10-25 22:22:36,710 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2020-10-25 22:22:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:36,711 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-10-25 22:22:36,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-25 22:22:36,711 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-10-25 22:22:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-25 22:22:36,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:36,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:36,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-25 22:22:36,712 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:36,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:36,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1704358272, now seen corresponding path program 1 times [2020-10-25 22:22:36,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:36,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880994007] [2020-10-25 22:22:36,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:36,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880994007] [2020-10-25 22:22:36,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829030270] [2020-10-25 22:22:36,974 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 [2020-10-25 22:22:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:37,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-25 22:22:37,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:37,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:37,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:22:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:37,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:22:37,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2020-10-25 22:22:37,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389164148] [2020-10-25 22:22:37,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-25 22:22:37,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:37,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-25 22:22:37,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-25 22:22:37,239 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 12 states. [2020-10-25 22:22:37,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:37,445 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-10-25 22:22:37,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-25 22:22:37,446 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2020-10-25 22:22:37,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:37,447 INFO L225 Difference]: With dead ends: 28 [2020-10-25 22:22:37,447 INFO L226 Difference]: Without dead ends: 20 [2020-10-25 22:22:37,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-25 22:22:37,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-25 22:22:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2020-10-25 22:22:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-25 22:22:37,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-25 22:22:37,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2020-10-25 22:22:37,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:37,454 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-25 22:22:37,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-25 22:22:37,454 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-25 22:22:37,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-25 22:22:37,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:37,456 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:37,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-25 22:22:37,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:37,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:37,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2041212244, now seen corresponding path program 2 times [2020-10-25 22:22:37,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:37,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662798924] [2020-10-25 22:22:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:37,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:37,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662798924] [2020-10-25 22:22:37,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469554867] [2020-10-25 22:22:37,930 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 [2020-10-25 22:22:37,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-25 22:22:37,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-25 22:22:37,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-25 22:22:37,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:38,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:38,143 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:22:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:38,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:22:38,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2020-10-25 22:22:38,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476381584] [2020-10-25 22:22:38,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-25 22:22:38,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:38,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-25 22:22:38,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-25 22:22:38,169 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 17 states. [2020-10-25 22:22:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:38,663 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-10-25 22:22:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-25 22:22:38,664 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 15 [2020-10-25 22:22:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:38,665 INFO L225 Difference]: With dead ends: 34 [2020-10-25 22:22:38,665 INFO L226 Difference]: Without dead ends: 26 [2020-10-25 22:22:38,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2020-10-25 22:22:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-25 22:22:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2020-10-25 22:22:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-25 22:22:38,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-10-25 22:22:38,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2020-10-25 22:22:38,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:38,674 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-10-25 22:22:38,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-25 22:22:38,674 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-10-25 22:22:38,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-25 22:22:38,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-25 22:22:38,675 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-25 22:22:38,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:38,876 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-25 22:22:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-25 22:22:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -511798398, now seen corresponding path program 1 times [2020-10-25 22:22:38,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-25 22:22:38,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796181909] [2020-10-25 22:22:38,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-25 22:22:38,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-25 22:22:39,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796181909] [2020-10-25 22:22:39,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29699674] [2020-10-25 22:22:39,192 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 [2020-10-25 22:22:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-25 22:22:39,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-25 22:22:39,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-25 22:22:39,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-25 22:22:39,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-25 22:22:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-25 22:22:39,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-25 22:22:39,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2020-10-25 22:22:39,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092660908] [2020-10-25 22:22:39,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-25 22:22:39,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-25 22:22:39,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-25 22:22:39,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2020-10-25 22:22:39,487 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 20 states. [2020-10-25 22:22:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-25 22:22:40,346 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2020-10-25 22:22:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-25 22:22:40,346 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 18 [2020-10-25 22:22:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-25 22:22:40,347 INFO L225 Difference]: With dead ends: 31 [2020-10-25 22:22:40,347 INFO L226 Difference]: Without dead ends: 0 [2020-10-25 22:22:40,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2020-10-25 22:22:40,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-25 22:22:40,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-25 22:22:40,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-25 22:22:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-25 22:22:40,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-10-25 22:22:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-25 22:22:40,351 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-25 22:22:40,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-25 22:22:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-25 22:22:40,352 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-25 22:22:40,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-25 22:22:40,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-25 22:22:40,636 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point L29(lines 29 35) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point L29-2(lines 29 35) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-25 22:22:40,637 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-25 22:22:40,638 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-25 22:22:40,638 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~a~0 ULTIMATE.start_main_~b~0)) (.cse1 (* 3 ULTIMATE.start_main_~i~0))) (and (<= .cse0 (* 3 ULTIMATE.start_main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-10-25 22:22:40,638 INFO L274 CegarLoopResult]: For program point L28-3(lines 28 37) no Hoare annotation was computed. [2020-10-25 22:22:40,638 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2020-10-25 22:22:40,639 INFO L274 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-10-25 22:22:40,639 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-10-25 22:22:40,639 INFO L274 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-10-25 22:22:40,639 INFO L274 CegarLoopResult]: For program point L12-2(line 12) no Hoare annotation was computed. [2020-10-25 22:22:40,639 INFO L274 CegarLoopResult]: For program point L12-3(line 12) no Hoare annotation was computed. [2020-10-25 22:22:40,639 INFO L277 CegarLoopResult]: At program point L39(lines 24 40) the Hoare annotation is: true [2020-10-25 22:22:40,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.10 10:22:40 BoogieIcfgContainer [2020-10-25 22:22:40,658 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-25 22:22:40,658 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-25 22:22:40,659 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-25 22:22:40,659 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-25 22:22:40,659 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.10 10:22:35" (3/4) ... [2020-10-25 22:22:40,663 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-25 22:22:40,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-25 22:22:40,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-10-25 22:22:40,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:22:40,675 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-25 22:22:40,725 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-25 22:22:40,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-25 22:22:40,727 INFO L168 Benchmark]: Toolchain (without parser) took 5650.57 ms. Allocated memory was 44.0 MB in the beginning and 98.6 MB in the end (delta: 54.5 MB). Free memory was 21.0 MB in the beginning and 61.1 MB in the end (delta: -40.1 MB). Peak memory consumption was 16.6 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,727 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 35.7 MB. Free memory was 20.1 MB in the beginning and 20.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:22:40,728 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.70 ms. Allocated memory is still 44.0 MB. Free memory was 20.4 MB in the beginning and 20.1 MB in the end (delta: 274.0 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,729 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.88 ms. Allocated memory is still 44.0 MB. Free memory was 20.0 MB in the beginning and 28.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,729 INFO L168 Benchmark]: Boogie Preprocessor took 25.77 ms. Allocated memory is still 44.0 MB. Free memory was 28.6 MB in the beginning and 27.7 MB in the end (delta: 965.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-25 22:22:40,730 INFO L168 Benchmark]: RCFGBuilder took 453.41 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.7 MB in the beginning and 36.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,731 INFO L168 Benchmark]: TraceAbstraction took 4777.33 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 36.2 MB in the beginning and 63.2 MB in the end (delta: -27.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,731 INFO L168 Benchmark]: Witness Printer took 66.40 ms. Allocated memory is still 98.6 MB. Free memory was 63.2 MB in the beginning and 61.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-25 22:22:40,736 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 35.7 MB. Free memory was 20.1 MB in the beginning and 20.0 MB in the end (delta: 26.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.70 ms. Allocated memory is still 44.0 MB. Free memory was 20.4 MB in the beginning and 20.1 MB in the end (delta: 274.0 kB). Peak memory consumption was 5.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.88 ms. Allocated memory is still 44.0 MB. Free memory was 20.0 MB in the beginning and 28.6 MB in the end (delta: -8.6 MB). Peak memory consumption was 2.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.77 ms. Allocated memory is still 44.0 MB. Free memory was 28.6 MB in the beginning and 27.7 MB in the end (delta: 965.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 453.41 ms. Allocated memory was 44.0 MB in the beginning and 54.5 MB in the end (delta: 10.5 MB). Free memory was 27.7 MB in the beginning and 36.6 MB in the end (delta: -8.9 MB). Peak memory consumption was 11.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4777.33 ms. Allocated memory was 54.5 MB in the beginning and 98.6 MB in the end (delta: 44.0 MB). Free memory was 36.2 MB in the beginning and 63.2 MB in the end (delta: -27.0 MB). Peak memory consumption was 16.2 MB. Max. memory is 16.1 GB. * Witness Printer took 66.40 ms. Allocated memory is still 98.6 MB. Free memory was 63.2 MB in the beginning and 61.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 53 SDslu, 117 SDs, 0 SdLazy, 477 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=4, 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, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 11 NumberOfFragments, 24 HoareAnnotationTreeSize, 3 FomulaSimplifications, 148 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 122 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 11797 SizeOfPredicates, 18 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...