./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_o3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_o3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9b6c190b845f4496788acb9553cb85e1e7dace14 ............................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 03:29:24,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:29:24,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:29:24,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:29:24,458 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:29:24,459 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:29:24,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:29:24,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:29:24,475 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:29:24,479 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:29:24,480 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:29:24,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:29:24,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:29:24,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:29:24,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:29:24,485 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:29:24,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:29:24,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:29:24,489 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:29:24,493 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:29:24,496 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:29:24,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:29:24,500 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:29:24,501 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:29:24,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:29:24,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:29:24,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:29:24,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:29:24,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:29:24,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:29:24,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:29:24,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:29:24,508 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:29:24,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:29:24,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:29:24,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:29:24,510 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:29:24,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:29:24,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:29:24,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:29:24,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:29:24,513 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:29:24,537 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:29:24,537 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:29:24,538 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:29:24,538 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:29:24,538 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:29:24,539 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:29:24,539 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:29:24,539 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:29:24,539 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:29:24,539 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:29:24,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:29:24,540 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:29:24,540 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:29:24,540 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:29:24,540 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:29:24,541 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:29:24,541 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:29:24,541 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:29:24,541 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:29:24,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:29:24,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:29:24,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:29:24,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:29:24,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:29:24,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:29:24,543 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:29:24,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:29:24,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:29:24,544 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer 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(__VERIFIER_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 -> 9b6c190b845f4496788acb9553cb85e1e7dace14 [2019-11-20 03:29:24,680 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:29:24,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:29:24,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:29:24,699 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:29:24,700 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:29:24,700 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-20 03:29:24,761 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/data/b493e3095/f017517f396f4db8b74f95b7265b7458/FLAG4cc9b25d6 [2019-11-20 03:29:25,140 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:29:25,140 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/sv-benchmarks/c/recursive-simple/id_o3.c [2019-11-20 03:29:25,147 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/data/b493e3095/f017517f396f4db8b74f95b7265b7458/FLAG4cc9b25d6 [2019-11-20 03:29:25,162 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/data/b493e3095/f017517f396f4db8b74f95b7265b7458 [2019-11-20 03:29:25,165 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:29:25,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:29:25,168 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:29:25,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:29:25,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:29:25,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@260da99f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25, skipping insertion in model container [2019-11-20 03:29:25,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,183 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:29:25,199 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:29:25,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:29:25,328 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:29:25,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:29:25,413 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:29:25,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25 WrapperNode [2019-11-20 03:29:25,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:29:25,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:29:25,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:29:25,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:29:25,422 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,426 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,441 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:29:25,442 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:29:25,442 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:29:25,442 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:29:25,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,454 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... [2019-11-20 03:29:25,455 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:29:25,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:29:25,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:29:25,456 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:29:25,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/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 [2019-11-20 03:29:25,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:29:25,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:29:25,522 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-20 03:29:25,522 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-20 03:29:25,686 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:29:25,687 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:29:25,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:25 BoogieIcfgContainer [2019-11-20 03:29:25,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:29:25,689 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:29:25,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:29:25,693 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:29:25,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:29:25" (1/3) ... [2019-11-20 03:29:25,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3c4b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:29:25, skipping insertion in model container [2019-11-20 03:29:25,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:29:25" (2/3) ... [2019-11-20 03:29:25,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3c4b30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:29:25, skipping insertion in model container [2019-11-20 03:29:25,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:25" (3/3) ... [2019-11-20 03:29:25,698 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o3.c [2019-11-20 03:29:25,707 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:29:25,714 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:29:25,725 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:29:25,751 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:29:25,751 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:29:25,751 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:29:25,751 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:29:25,751 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:29:25,753 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:29:25,753 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:29:25,753 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:29:25,771 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-20 03:29:25,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 03:29:25,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:25,776 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:25,776 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:25,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:25,782 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-20 03:29:25,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:25,788 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229755376] [2019-11-20 03:29:25,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:29:26,015 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229755376] [2019-11-20 03:29:26,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:29:26,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 03:29:26,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632249276] [2019-11-20 03:29:26,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 03:29:26,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 03:29:26,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 03:29:26,045 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-20 03:29:26,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:26,091 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-20 03:29:26,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 03:29:26,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-20 03:29:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:26,100 INFO L225 Difference]: With dead ends: 27 [2019-11-20 03:29:26,100 INFO L226 Difference]: Without dead ends: 14 [2019-11-20 03:29:26,103 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 03:29:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-20 03:29:26,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-20 03:29:26,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-20 03:29:26,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-20 03:29:26,137 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-20 03:29:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:26,137 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-20 03:29:26,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 03:29:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-20 03:29:26,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-20 03:29:26,139 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:26,139 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:26,140 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:26,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:26,140 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-20 03:29:26,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:26,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622432258] [2019-11-20 03:29:26,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:26,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:29:26,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622432258] [2019-11-20 03:29:26,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856878598] [2019-11-20 03:29:26,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/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 [2019-11-20 03:29:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:29:26,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:26,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 03:29:26,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:26,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-11-20 03:29:26,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341848722] [2019-11-20 03:29:26,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 03:29:26,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:26,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 03:29:26,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:29:26,408 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-20 03:29:26,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:26,455 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-20 03:29:26,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 03:29:26,456 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-20 03:29:26,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:26,457 INFO L225 Difference]: With dead ends: 21 [2019-11-20 03:29:26,457 INFO L226 Difference]: Without dead ends: 17 [2019-11-20 03:29:26,458 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-20 03:29:26,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-20 03:29:26,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-20 03:29:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 03:29:26,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-20 03:29:26,466 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-20 03:29:26,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:26,466 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-20 03:29:26,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 03:29:26,467 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-20 03:29:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-20 03:29:26,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:26,468 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:26,672 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:26,672 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-20 03:29:26,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:26,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403105802] [2019-11-20 03:29:26,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:26,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:29:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:29:26,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403105802] [2019-11-20 03:29:26,952 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094519688] [2019-11-20 03:29:26,952 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/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 [2019-11-20 03:29:26,993 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:29:26,993 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:29:26,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 03:29:26,996 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:29:27,037 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 03:29:27,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:29:27,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-20 03:29:27,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424802529] [2019-11-20 03:29:27,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 03:29:27,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:29:27,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 03:29:27,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:29:27,040 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 10 states. [2019-11-20 03:29:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:29:27,082 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-20 03:29:27,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 03:29:27,082 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-11-20 03:29:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:29:27,083 INFO L225 Difference]: With dead ends: 24 [2019-11-20 03:29:27,083 INFO L226 Difference]: Without dead ends: 20 [2019-11-20 03:29:27,084 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-20 03:29:27,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-20 03:29:27,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-20 03:29:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-20 03:29:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-20 03:29:27,088 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-20 03:29:27,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:29:27,089 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-20 03:29:27,089 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 03:29:27,089 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-20 03:29:27,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 03:29:27,090 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:29:27,090 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:29:27,293 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:29:27,294 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:29:27,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:29:27,294 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-20 03:29:27,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:29:27,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026565713] [2019-11-20 03:29:27,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:29:27,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:29:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 03:29:27,348 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 03:29:27,349 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-20 03:29:27,368 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 03:29:27 BoogieIcfgContainer [2019-11-20 03:29:27,368 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 03:29:27,368 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 03:29:27,369 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 03:29:27,369 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 03:29:27,369 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:29:25" (3/4) ... [2019-11-20 03:29:27,371 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2019-11-20 03:29:27,413 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c69dfb98-c3f9-43ba-972a-743de2e8e11f/bin/uautomizer/witness.graphml [2019-11-20 03:29:27,413 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 03:29:27,415 INFO L168 Benchmark]: Toolchain (without parser) took 2248.52 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 952.8 MB in the beginning and 1.0 GB in the end (delta: -69.0 MB). Peak memory consumption was 77.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:29:27,416 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:29:27,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 952.8 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-20 03:29:27,417 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:29:27,417 INFO L168 Benchmark]: Boogie Preprocessor took 13.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:29:27,417 INFO L168 Benchmark]: RCFGBuilder took 232.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. [2019-11-20 03:29:27,418 INFO L168 Benchmark]: TraceAbstraction took 1679.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.9 MB). Peak memory consumption was 100.9 MB. Max. memory is 11.5 GB. [2019-11-20 03:29:27,418 INFO L168 Benchmark]: Witness Printer took 44.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:29:27,421 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 245.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 952.8 MB in the beginning and 1.1 GB in the end (delta: -184.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.23 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.58 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 232.48 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 14.8 MB). Peak memory consumption was 14.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1679.46 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 100.9 MB). Peak memory consumption was 100.9 MB. Max. memory is 11.5 GB. * Witness Printer took 44.82 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 3 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: UNSAFE, OverallTime: 1.6s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 42 SDtfs, 3 SDslu, 207 SDs, 0 SdLazy, 69 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=3, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 5160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 80 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 18/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...