./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7862960b0aa057ac19174563f251d134d1269c2b ............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 01:49:02,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 01:49:02,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 01:49:02,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 01:49:02,137 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 01:49:02,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 01:49:02,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 01:49:02,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 01:49:02,154 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 01:49:02,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 01:49:02,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 01:49:02,159 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 01:49:02,160 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 01:49:02,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 01:49:02,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 01:49:02,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 01:49:02,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 01:49:02,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 01:49:02,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 01:49:02,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 01:49:02,174 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 01:49:02,174 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 01:49:02,177 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 01:49:02,177 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 01:49:02,182 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 01:49:02,182 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 01:49:02,182 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 01:49:02,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 01:49:02,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 01:49:02,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 01:49:02,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 01:49:02,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 01:49:02,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 01:49:02,191 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 01:49:02,192 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 01:49:02,192 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 01:49:02,199 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 01:49:02,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 01:49:02,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 01:49:02,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 01:49:02,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 01:49:02,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 01:49:02,246 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 01:49:02,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 01:49:02,248 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 01:49:02,248 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 01:49:02,248 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 01:49:02,248 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 01:49:02,249 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 01:49:02,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 01:49:02,249 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 01:49:02,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 01:49:02,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 01:49:02,250 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 01:49:02,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 01:49:02,251 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 01:49:02,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 01:49:02,251 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 01:49:02,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 01:49:02,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 01:49:02,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 01:49:02,253 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 01:49:02,253 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 01:49:02,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:49:02,253 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 01:49:02,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 01:49:02,254 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 01:49:02,254 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 01:49:02,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 01:49:02,254 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 01:49:02,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 01:49:02,254 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 -> 7862960b0aa057ac19174563f251d134d1269c2b [2020-10-20 01:49:02,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 01:49:02,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 01:49:02,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 01:49:02,468 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 01:49:02,470 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 01:49:02,471 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-10-20 01:49:02,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1593cb61e/cac247014d844a87bf0a7575ec385406/FLAG349d3ddc1 [2020-10-20 01:49:02,979 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 01:49:02,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/elimination_max_rec.c [2020-10-20 01:49:02,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1593cb61e/cac247014d844a87bf0a7575ec385406/FLAG349d3ddc1 [2020-10-20 01:49:03,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1593cb61e/cac247014d844a87bf0a7575ec385406 [2020-10-20 01:49:03,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 01:49:03,425 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 01:49:03,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 01:49:03,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 01:49:03,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 01:49:03,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,433 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a24801a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03, skipping insertion in model container [2020-10-20 01:49:03,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 01:49:03,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 01:49:03,644 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:49:03,667 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 01:49:03,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 01:49:03,732 INFO L208 MainTranslator]: Completed translation [2020-10-20 01:49:03,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03 WrapperNode [2020-10-20 01:49:03,733 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 01:49:03,735 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 01:49:03,735 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 01:49:03,735 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 01:49:03,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,768 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 01:49:03,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 01:49:03,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 01:49:03,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 01:49:03,816 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,849 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,852 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... [2020-10-20 01:49:03,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 01:49:03,857 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 01:49:03,857 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 01:49:03,857 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 01:49:03,858 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 01:49:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 01:49:03,930 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-20 01:49:03,930 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-10-20 01:49:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 01:49:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 01:49:03,931 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 01:49:03,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 01:49:03,932 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 01:49:03,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 01:49:04,288 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 01:49:04,288 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-20 01:49:04,290 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:49:04 BoogieIcfgContainer [2020-10-20 01:49:04,290 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 01:49:04,292 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 01:49:04,292 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 01:49:04,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 01:49:04,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 01:49:03" (1/3) ... [2020-10-20 01:49:04,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517c7bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:49:04, skipping insertion in model container [2020-10-20 01:49:04,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 01:49:03" (2/3) ... [2020-10-20 01:49:04,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@517c7bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 01:49:04, skipping insertion in model container [2020-10-20 01:49:04,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:49:04" (3/3) ... [2020-10-20 01:49:04,299 INFO L111 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2020-10-20 01:49:04,310 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 01:49:04,317 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-10-20 01:49:04,330 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-10-20 01:49:04,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 01:49:04,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 01:49:04,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 01:49:04,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 01:49:04,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 01:49:04,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 01:49:04,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 01:49:04,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 01:49:04,376 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-20 01:49:04,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:49:04,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:04,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:04,383 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:04,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:04,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1224318051, now seen corresponding path program 1 times [2020-10-20 01:49:04,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:04,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891989688] [2020-10-20 01:49:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:04,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:49:04,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891989688] [2020-10-20 01:49:04,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:49:04,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 01:49:04,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847245729] [2020-10-20 01:49:04,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 01:49:04,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:04,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 01:49:04,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:49:04,606 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 01:49:04,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:04,630 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2020-10-20 01:49:04,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 01:49:04,631 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 01:49:04,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:04,641 INFO L225 Difference]: With dead ends: 53 [2020-10-20 01:49:04,641 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 01:49:04,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 01:49:04,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 01:49:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 01:49:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 01:49:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-20 01:49:04,685 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2020-10-20 01:49:04,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:04,686 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-20 01:49:04,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 01:49:04,686 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-20 01:49:04,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 01:49:04,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:04,687 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:04,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 01:49:04,688 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2033664677, now seen corresponding path program 1 times [2020-10-20 01:49:04,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:04,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039522046] [2020-10-20 01:49:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:04,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:49:04,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039522046] [2020-10-20 01:49:04,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 01:49:04,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 01:49:04,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429965426] [2020-10-20 01:49:04,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 01:49:04,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:04,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 01:49:04,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 01:49:04,830 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-20 01:49:05,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:05,001 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-10-20 01:49:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 01:49:05,004 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-20 01:49:05,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:05,011 INFO L225 Difference]: With dead ends: 54 [2020-10-20 01:49:05,012 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 01:49:05,013 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 [2020-10-20 01:49:05,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 01:49:05,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-10-20 01:49:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 01:49:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-20 01:49:05,033 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2020-10-20 01:49:05,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:05,034 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-20 01:49:05,034 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 01:49:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-20 01:49:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 01:49:05,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:05,039 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:05,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 01:49:05,040 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:05,041 INFO L82 PathProgramCache]: Analyzing trace with hash 958141500, now seen corresponding path program 1 times [2020-10-20 01:49:05,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:05,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551547511] [2020-10-20 01:49:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:05,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:49:05,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551547511] [2020-10-20 01:49:05,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816142777] [2020-10-20 01:49:05,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:49:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:05,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 01:49:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:49:05,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:49:05,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:49:05,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:49:05,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:49:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:49:05,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:49:05,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-10-20 01:49:05,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005739324] [2020-10-20 01:49:05,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 01:49:05,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:05,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 01:49:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-20 01:49:05,501 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 10 states. [2020-10-20 01:49:05,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:05,815 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-20 01:49:05,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 01:49:05,816 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 16 [2020-10-20 01:49:05,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:05,817 INFO L225 Difference]: With dead ends: 52 [2020-10-20 01:49:05,817 INFO L226 Difference]: Without dead ends: 50 [2020-10-20 01:49:05,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2020-10-20 01:49:05,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-20 01:49:05,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 21. [2020-10-20 01:49:05,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-20 01:49:05,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-20 01:49:05,825 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2020-10-20 01:49:05,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:05,826 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-20 01:49:05,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 01:49:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-20 01:49:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-20 01:49:05,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 01:49:05,828 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 01:49:06,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-10-20 01:49:06,041 INFO L429 AbstractCegarLoop]: === Iteration 4 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 01:49:06,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 01:49:06,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1234363027, now seen corresponding path program 1 times [2020-10-20 01:49:06,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 01:49:06,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030804988] [2020-10-20 01:49:06,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 01:49:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:06,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-10-20 01:49:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 01:49:06,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030804988] [2020-10-20 01:49:06,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211546300] [2020-10-20 01:49:06,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:49:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 01:49:06,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 01:49:06,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 01:49:06,308 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2020-10-20 01:49:06,309 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 01:49:06,312 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 01:49:06,313 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-20 01:49:06,314 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-10-20 01:49:08,341 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1) ((as const (Array Int Int)) 0))) is different from true [2020-10-20 01:49:08,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 01:49:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2020-10-20 01:49:08,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 01:49:08,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2020-10-20 01:49:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734137185] [2020-10-20 01:49:08,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 01:49:08,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 01:49:08,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 01:49:08,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=43, Unknown=1, NotChecked=12, Total=72 [2020-10-20 01:49:08,482 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 9 states. [2020-10-20 01:49:08,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 01:49:08,584 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-10-20 01:49:08,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-20 01:49:08,585 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-10-20 01:49:08,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 01:49:08,585 INFO L225 Difference]: With dead ends: 23 [2020-10-20 01:49:08,586 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 01:49:08,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=38, Invalid=97, Unknown=1, NotChecked=20, Total=156 [2020-10-20 01:49:08,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 01:49:08,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 01:49:08,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 01:49:08,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 01:49:08,587 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-10-20 01:49:08,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 01:49:08,588 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 01:49:08,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 01:49:08,588 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 01:49:08,588 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 01:49:08,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 01:49:08,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 01:49:08,931 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 01:49:08,932 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 01:49:08,932 INFO L274 CegarLoopResult]: For program point L-1-1(line -1) no Hoare annotation was computed. [2020-10-20 01:49:08,932 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 01:49:08,932 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 01:49:08,932 INFO L277 CegarLoopResult]: At program point L49(lines 41 50) the Hoare annotation is: true [2020-10-20 01:49:08,932 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |ULTIMATE.start_main_#t~malloc17.base|)) (= (select |#memory_int| ULTIMATE.start_main_~a~0.base) .cse0))) [2020-10-20 01:49:08,933 INFO L274 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-10-20 01:49:08,933 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-20 01:49:08,933 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-20 01:49:08,933 INFO L277 CegarLoopResult]: At program point checkENTRY(lines 16 39) the Hoare annotation is: true [2020-10-20 01:49:08,933 INFO L274 CegarLoopResult]: For program point L25(lines 25 26) no Hoare annotation was computed. [2020-10-20 01:49:08,934 INFO L274 CegarLoopResult]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,934 INFO L270 CegarLoopResult]: At program point L25-2(lines 25 26) the Hoare annotation is: (let ((.cse2 (= |check_#in~x| 0)) (.cse3 ((as const (Array Int Int)) 0))) (or (and (let ((.cse0 (<= 1 check___VERIFIER_assert_~cond)) (.cse1 (<= (+ check_~y 1) check_~n))) (or (and .cse0 .cse1 (<= 1 check_~x)) (and .cse0 .cse2 .cse1 (= check_~x 0)))) (= (select |#memory_int| check_~a.base) .cse3)) (let ((.cse4 (not (<= (+ |check_#in~y| 1) |check_#in~n|)))) (and (or .cse4 (not .cse2)) (or .cse4 (not (<= 1 |check_#in~x|))))) (not (= (select |#memory_int| |check_#in~a.base|) .cse3)))) [2020-10-20 01:49:08,934 INFO L274 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-10-20 01:49:08,934 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-10-20 01:49:08,934 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-10-20 01:49:08,935 INFO L274 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-10-20 01:49:08,935 INFO L274 CegarLoopResult]: For program point checkFINAL(lines 16 39) no Hoare annotation was computed. [2020-10-20 01:49:08,935 INFO L274 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,935 INFO L274 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,935 INFO L274 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,936 INFO L274 CegarLoopResult]: For program point L5-3(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,936 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-20 01:49:08,936 INFO L274 CegarLoopResult]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-10-20 01:49:08,936 INFO L274 CegarLoopResult]: For program point checkEXIT(lines 16 39) no Hoare annotation was computed. [2020-10-20 01:49:08,936 INFO L274 CegarLoopResult]: For program point L10(lines 10 12) no Hoare annotation was computed. [2020-10-20 01:49:08,937 INFO L274 CegarLoopResult]: For program point L10-1(lines 10 12) no Hoare annotation was computed. [2020-10-20 01:49:08,937 INFO L274 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-10-20 01:49:08,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 01:49:08 BoogieIcfgContainer [2020-10-20 01:49:08,947 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 01:49:08,947 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 01:49:08,948 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 01:49:08,948 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 01:49:08,949 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 01:49:04" (3/4) ... [2020-10-20 01:49:08,952 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 01:49:08,960 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2020-10-20 01:49:08,965 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-20 01:49:08,966 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-10-20 01:49:08,966 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-20 01:49:08,967 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 01:49:09,034 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 01:49:09,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 01:49:09,036 INFO L168 Benchmark]: Toolchain (without parser) took 5614.84 ms. Allocated memory was 41.9 MB in the beginning and 55.6 MB in the end (delta: 13.6 MB). Free memory was 22.0 MB in the beginning and 37.4 MB in the end (delta: -15.4 MB). Peak memory consumption was 25.5 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,037 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.56 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 22.4 MB in the end (delta: -1.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,039 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.44 ms. Allocated memory is still 42.5 MB. Free memory was 22.4 MB in the beginning and 20.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,046 INFO L168 Benchmark]: Boogie Preprocessor took 49.23 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 19.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,046 INFO L168 Benchmark]: RCFGBuilder took 433.86 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 19.0 MB in the beginning and 19.7 MB in the end (delta: -655.6 kB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,047 INFO L168 Benchmark]: TraceAbstraction took 4655.37 ms. Allocated memory was 45.1 MB in the beginning and 55.1 MB in the end (delta: 10.0 MB). Free memory was 19.2 MB in the beginning and 11.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,048 INFO L168 Benchmark]: Witness Printer took 87.29 ms. Allocated memory was 55.1 MB in the beginning and 55.6 MB in the end (delta: 524.3 kB). Free memory was 11.5 MB in the beginning and 37.4 MB in the end (delta: -25.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 01:49:09,061 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 32.0 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 47.5 kB). Peak memory consumption was 47.5 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 307.56 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 21.1 MB in the beginning and 22.4 MB in the end (delta: -1.3 MB). Peak memory consumption was 12.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 70.44 ms. Allocated memory is still 42.5 MB. Free memory was 22.4 MB in the beginning and 20.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 49.23 ms. Allocated memory is still 42.5 MB. Free memory was 20.4 MB in the beginning and 19.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 433.86 ms. Allocated memory was 42.5 MB in the beginning and 45.1 MB in the end (delta: 2.6 MB). Free memory was 19.0 MB in the beginning and 19.7 MB in the end (delta: -655.6 kB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4655.37 ms. Allocated memory was 45.1 MB in the beginning and 55.1 MB in the end (delta: 10.0 MB). Free memory was 19.2 MB in the beginning and 11.5 MB in the end (delta: 7.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 14.3 GB. * Witness Printer took 87.29 ms. Allocated memory was 55.1 MB in the beginning and 55.6 MB in the end (delta: 524.3 kB). Free memory was 11.5 MB in the beginning and 37.4 MB in the end (delta: -25.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 41]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 111 SDtfs, 204 SDslu, 178 SDs, 0 SdLazy, 160 SolverSat, 75 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=2, 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, 4 MinimizatonAttempts, 44 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 10 PreInvPairs, 14 NumberOfFragments, 81 HoareAnnotationTreeSize, 10 FomulaSimplifications, 8 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 107 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 4 QuantifiedInterpolants, 6358 SizeOfPredicates, 23 NumberOfNonLiveVariables, 286 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 2/10 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...