./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer --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 2cc8e2531753efe353b2d0bfa802b879fbc4d745 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.0-69874e2 [2020-12-01 15:22:16,243 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:22:16,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:22:16,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:22:16,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:22:16,369 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:22:16,372 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:22:16,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:22:16,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:22:16,390 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:22:16,391 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:22:16,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:22:16,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:22:16,405 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:22:16,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:22:16,411 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:22:16,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:22:16,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:22:16,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:22:16,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:22:16,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:22:16,435 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:22:16,438 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:22:16,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:22:16,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:22:16,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:22:16,451 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:22:16,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:22:16,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:22:16,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:22:16,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:22:16,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:22:16,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:22:16,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:22:16,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:22:16,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:22:16,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:22:16,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:22:16,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:22:16,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:22:16,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:22:16,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:22:16,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:22:16,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:22:16,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:22:16,499 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:22:16,499 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:22:16,499 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:22:16,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:22:16,500 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:22:16,500 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:22:16,500 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:22:16,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:22:16,501 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:22:16,501 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:22:16,501 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:22:16,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:22:16,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:22:16,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:22:16,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:22:16,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:22:16,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:22:16,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:22:16,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:22:16,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:22:16,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:22:16,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:22:16,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:22:16,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:22:16,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:22:16,505 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:22:16,505 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cc8e2531753efe353b2d0bfa802b879fbc4d745 [2020-12-01 15:22:16,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:22:16,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:22:16,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:22:16,848 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:22:16,849 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:22:16,850 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/id_i5_o5-1.c [2020-12-01 15:22:16,956 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/data/41c2ba338/32921b10f1d143ae970f3366ea22a9df/FLAG22e269d5b [2020-12-01 15:22:17,526 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:22:17,527 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/sv-benchmarks/c/recursive-simple/id_i5_o5-1.c [2020-12-01 15:22:17,535 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/data/41c2ba338/32921b10f1d143ae970f3366ea22a9df/FLAG22e269d5b [2020-12-01 15:22:17,881 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/data/41c2ba338/32921b10f1d143ae970f3366ea22a9df [2020-12-01 15:22:17,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:22:17,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:22:17,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:22:17,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:22:17,914 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:22:17,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:22:17" (1/1) ... [2020-12-01 15:22:17,920 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11962afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:17, skipping insertion in model container [2020-12-01 15:22:17,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:22:17" (1/1) ... [2020-12-01 15:22:17,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:22:17,951 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:22:18,186 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:22:18,206 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:22:18,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:22:18,260 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:22:18,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18 WrapperNode [2020-12-01 15:22:18,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:22:18,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:22:18,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:22:18,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:22:18,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:22:18,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:22:18,324 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:22:18,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:22:18,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... [2020-12-01 15:22:18,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:22:18,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:22:18,374 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:22:18,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:22:18,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/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 [2020-12-01 15:22:18,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:22:18,472 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:22:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:22:18,472 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-01 15:22:18,472 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-01 15:22:18,473 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:22:18,814 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:22:18,814 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:22:18,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:18 BoogieIcfgContainer [2020-12-01 15:22:18,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:22:18,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:22:18,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:22:18,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:22:18,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:22:17" (1/3) ... [2020-12-01 15:22:18,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e198e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:22:18, skipping insertion in model container [2020-12-01 15:22:18,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:22:18" (2/3) ... [2020-12-01 15:22:18,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e198e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:22:18, skipping insertion in model container [2020-12-01 15:22:18,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:18" (3/3) ... [2020-12-01 15:22:18,828 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-12-01 15:22:18,846 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:22:18,850 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:22:18,865 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:22:18,897 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:22:18,898 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:22:18,898 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:22:18,898 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:22:18,898 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:22:18,898 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:22:18,899 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:22:18,899 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:22:18,918 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-12-01 15:22:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-01 15:22:18,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:18,926 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:18,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:18,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:18,935 INFO L82 PathProgramCache]: Analyzing trace with hash 666808458, now seen corresponding path program 1 times [2020-12-01 15:22:18,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:18,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801086546] [2020-12-01 15:22:18,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:19,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:22:19,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801086546] [2020-12-01 15:22:19,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:22:19,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:22:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363374471] [2020-12-01 15:22:19,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:22:19,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:22:19,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:22:19,216 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 5 states. [2020-12-01 15:22:19,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:19,306 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2020-12-01 15:22:19,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:22:19,308 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-01 15:22:19,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:19,325 INFO L225 Difference]: With dead ends: 29 [2020-12-01 15:22:19,325 INFO L226 Difference]: Without dead ends: 15 [2020-12-01 15:22:19,329 INFO L677 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 [2020-12-01 15:22:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-01 15:22:19,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-01 15:22:19,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-01 15:22:19,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-12-01 15:22:19,417 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-12-01 15:22:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:19,417 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-12-01 15:22:19,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:22:19,418 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-12-01 15:22:19,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-01 15:22:19,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:19,420 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:19,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:22:19,420 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:19,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:19,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1352629460, now seen corresponding path program 1 times [2020-12-01 15:22:19,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:19,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020455197] [2020-12-01 15:22:19,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:22:19,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020455197] [2020-12-01 15:22:19,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324036058] [2020-12-01 15:22:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/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 [2020-12-01 15:22:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:22:19,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:22:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-01 15:22:19,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:22:19,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-01 15:22:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404022501] [2020-12-01 15:22:19,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-01 15:22:19,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:22:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:22:19,932 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 8 states. [2020-12-01 15:22:19,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:19,991 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2020-12-01 15:22:19,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:22:19,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-12-01 15:22:19,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:19,993 INFO L225 Difference]: With dead ends: 22 [2020-12-01 15:22:19,994 INFO L226 Difference]: Without dead ends: 18 [2020-12-01 15:22:19,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-01 15:22:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-01 15:22:20,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-01 15:22:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-01 15:22:20,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-01 15:22:20,002 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2020-12-01 15:22:20,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:20,003 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-01 15:22:20,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-01 15:22:20,003 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-01 15:22:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-01 15:22:20,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:20,005 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:20,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-01 15:22:20,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:20,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:20,222 INFO L82 PathProgramCache]: Analyzing trace with hash 832070858, now seen corresponding path program 2 times [2020-12-01 15:22:20,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:20,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534029446] [2020-12-01 15:22:20,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:20,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:20,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:20,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:20,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:20,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:22:20,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534029446] [2020-12-01 15:22:20,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273869684] [2020-12-01 15:22:20,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/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 [2020-12-01 15:22:20,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:22:20,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:22:20,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-01 15:22:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:22:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-01 15:22:20,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:22:20,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-01 15:22:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872791566] [2020-12-01 15:22:20,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-01 15:22:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-01 15:22:20,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-01 15:22:20,607 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 9 states. [2020-12-01 15:22:20,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:20,678 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-12-01 15:22:20,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:22:20,679 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-12-01 15:22:20,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:20,681 INFO L225 Difference]: With dead ends: 25 [2020-12-01 15:22:20,681 INFO L226 Difference]: Without dead ends: 21 [2020-12-01 15:22:20,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:22:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-12-01 15:22:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-12-01 15:22:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-01 15:22:20,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-12-01 15:22:20,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 22 [2020-12-01 15:22:20,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:20,692 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-12-01 15:22:20,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-01 15:22:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-12-01 15:22:20,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-01 15:22:20,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:20,694 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:20,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:22:20,921 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:20,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1547641236, now seen corresponding path program 3 times [2020-12-01 15:22:20,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:20,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924814099] [2020-12-01 15:22:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:20,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:21,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:21,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:21,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-01 15:22:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924814099] [2020-12-01 15:22:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470798555] [2020-12-01 15:22:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:22:21,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-01 15:22:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:22:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:22:21,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:22:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-01 15:22:21,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:22:21,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2020-12-01 15:22:21,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561265805] [2020-12-01 15:22:21,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-01 15:22:21,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-01 15:22:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-01 15:22:21,507 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 17 states. [2020-12-01 15:22:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:21,769 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-12-01 15:22:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:22:21,770 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28 [2020-12-01 15:22:21,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:21,772 INFO L225 Difference]: With dead ends: 28 [2020-12-01 15:22:21,772 INFO L226 Difference]: Without dead ends: 24 [2020-12-01 15:22:21,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-12-01 15:22:21,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-01 15:22:21,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-01 15:22:21,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 15:22:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-12-01 15:22:21,782 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 28 [2020-12-01 15:22:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:21,783 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-12-01 15:22:21,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-01 15:22:21,784 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-12-01 15:22:21,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-01 15:22:21,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:21,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:22,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:22:22,013 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:22,014 INFO L82 PathProgramCache]: Analyzing trace with hash -346978038, now seen corresponding path program 4 times [2020-12-01 15:22:22,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:22,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82783505] [2020-12-01 15:22:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:22,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:22,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-01 15:22:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:22:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 15:22:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82783505] [2020-12-01 15:22:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408068055] [2020-12-01 15:22:22,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:22:22,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-01 15:22:22,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:22:22,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:22:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:22:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-01 15:22:22,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:22:22,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-12-01 15:22:22,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089943072] [2020-12-01 15:22:22,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-01 15:22:22,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:22:22,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-01 15:22:22,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-01 15:22:22,459 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-12-01 15:22:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:22:22,581 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-12-01 15:22:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-01 15:22:22,582 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-12-01 15:22:22,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:22:22,594 INFO L225 Difference]: With dead ends: 31 [2020-12-01 15:22:22,596 INFO L226 Difference]: Without dead ends: 27 [2020-12-01 15:22:22,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-01 15:22:22,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-01 15:22:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-01 15:22:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-01 15:22:22,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-01 15:22:22,614 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 34 [2020-12-01 15:22:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:22:22,614 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-01 15:22:22,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-01 15:22:22,615 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-01 15:22:22,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-01 15:22:22,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:22:22,620 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:22:22,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:22:22,837 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:22:22,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:22:22,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1234184620, now seen corresponding path program 5 times [2020-12-01 15:22:22,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:22:22,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452578506] [2020-12-01 15:22:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:22:22,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:22:22,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:22:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:22:22,876 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:22:22,902 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:22:22,903 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:22:22,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-01 15:22:22,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:22:22 BoogieIcfgContainer [2020-12-01 15:22:22,992 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:22:22,992 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:22:22,992 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:22:22,993 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:22:22,993 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:22:18" (3/4) ... [2020-12-01 15:22:22,995 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:22:23,061 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dcd2820b-65bf-4c03-92b0-c708fa5ef672/bin/uautomizer/witness.graphml [2020-12-01 15:22:23,065 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:22:23,074 INFO L168 Benchmark]: Toolchain (without parser) took 5163.02 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 73.4 MB in the beginning and 82.2 MB in the end (delta: -8.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,075 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:22:23,076 INFO L168 Benchmark]: CACSL2BoogieTranslator took 352.18 ms. Allocated memory is still 104.9 MB. Free memory was 73.2 MB in the beginning and 82.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,081 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.46 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:22:23,082 INFO L168 Benchmark]: Boogie Preprocessor took 49.39 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,083 INFO L168 Benchmark]: RCFGBuilder took 442.93 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,084 INFO L168 Benchmark]: TraceAbstraction took 4173.29 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.1 MB in the beginning and 85.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,084 INFO L168 Benchmark]: Witness Printer took 75.20 ms. Allocated memory is still 125.8 MB. Free memory was 85.3 MB in the beginning and 82.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:22:23,088 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 71.3 MB. Free memory was 33.0 MB in the beginning and 33.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 352.18 ms. Allocated memory is still 104.9 MB. Free memory was 73.2 MB in the beginning and 82.8 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.46 ms. Allocated memory is still 104.9 MB. Free memory was 82.8 MB in the beginning and 81.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.39 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 442.93 ms. Allocated memory is still 104.9 MB. Free memory was 80.1 MB in the beginning and 69.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4173.29 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 69.1 MB in the beginning and 85.3 MB in the end (delta: -16.3 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. * Witness Printer took 75.20 ms. Allocated memory is still 125.8 MB. Free memory was 85.3 MB in the beginning and 82.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = 5; [L13] CALL, EXPR id(input) VAL [\old(x)=5] [L7] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L8] CALL, EXPR id(x-1) VAL [\old(x)=4] [L7] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L8] CALL, EXPR id(x-1) VAL [\old(x)=3] [L7] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L8] CALL, EXPR id(x-1) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id(x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id(x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] int result = id(input); [L14] COND TRUE result == 5 [L4] __assert_fail("0", "id_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 56 SDslu, 182 SDs, 0 SdLazy, 146 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 250 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 201 ConstructedInterpolants, 0 QuantifiedInterpolants, 11733 SizeOfPredicates, 13 NumberOfNonLiveVariables, 303 ConjunctsInSsa, 36 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 100/200 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...