./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 67768b34e7b9299b4c0862a201d7fe793c7261b3 .......................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:33:59,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:33:59,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:33:59,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:33:59,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:33:59,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:33:59,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:33:59,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:33:59,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:33:59,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:33:59,580 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:33:59,581 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:33:59,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:33:59,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:33:59,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:33:59,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:33:59,585 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:33:59,586 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:33:59,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:33:59,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:33:59,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:33:59,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:33:59,593 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:33:59,594 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:33:59,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:33:59,597 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:33:59,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:33:59,598 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:33:59,599 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:33:59,600 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:33:59,600 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:33:59,601 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:33:59,602 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:33:59,602 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:33:59,603 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:33:59,604 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:33:59,604 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:33:59,605 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:33:59,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:33:59,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:33:59,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:33:59,607 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:33:59,623 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:33:59,623 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:33:59,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:33:59,624 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:33:59,624 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:33:59,624 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:33:59,624 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:33:59,624 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:33:59,625 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:33:59,625 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:33:59,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:33:59,626 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:33:59,627 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:33:59,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:33:59,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:33:59,628 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2020-12-09 18:33:59,808 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:33:59,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:33:59,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:33:59,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:33:59,828 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:33:59,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/../../sv-benchmarks/c/loops/sum01_bug02.i [2020-12-09 18:33:59,871 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/data/f203e5976/2c20edd76e6e458d90ce319529f74e71/FLAGb7e88ffa2 [2020-12-09 18:34:00,232 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:34:00,233 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/sv-benchmarks/c/loops/sum01_bug02.i [2020-12-09 18:34:00,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/data/f203e5976/2c20edd76e6e458d90ce319529f74e71/FLAGb7e88ffa2 [2020-12-09 18:34:00,247 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/data/f203e5976/2c20edd76e6e458d90ce319529f74e71 [2020-12-09 18:34:00,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:34:00,250 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:34:00,252 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:34:00,252 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:34:00,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:34:00,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ffc127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00, skipping insertion in model container [2020-12-09 18:34:00,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:34:00,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:34:00,369 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2020-12-09 18:34:00,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:34:00,384 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:34:00,393 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2020-12-09 18:34:00,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:34:00,406 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:34:00,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00 WrapperNode [2020-12-09 18:34:00,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:34:00,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:34:00,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:34:00,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:34:00,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,422 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,435 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:34:00,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:34:00,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:34:00,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:34:00,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,448 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,451 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... [2020-12-09 18:34:00,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:34:00,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:34:00,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:34:00,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:34:00,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/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 [2020-12-09 18:34:00,517 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:34:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:34:00,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:34:00,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:34:00,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:34:00,722 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 18:34:00,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:34:00 BoogieIcfgContainer [2020-12-09 18:34:00,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:34:00,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:34:00,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:34:00,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:34:00,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:34:00" (1/3) ... [2020-12-09 18:34:00,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b68da05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:34:00, skipping insertion in model container [2020-12-09 18:34:00,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:34:00" (2/3) ... [2020-12-09 18:34:00,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b68da05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:34:00, skipping insertion in model container [2020-12-09 18:34:00,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:34:00" (3/3) ... [2020-12-09 18:34:00,732 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2020-12-09 18:34:00,745 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:34:00,748 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:34:00,757 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:34:00,774 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:34:00,774 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:34:00,774 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:34:00,774 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:34:00,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:34:00,774 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:34:00,774 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:34:00,774 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:34:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 18:34:00,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 18:34:00,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:34:00,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 18:34:00,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:34:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:34:00,791 INFO L82 PathProgramCache]: Analyzing trace with hash 2066023, now seen corresponding path program 1 times [2020-12-09 18:34:00,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:34:00,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547259395] [2020-12-09 18:34:00,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:34:00,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:34:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:00,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547259395] [2020-12-09 18:34:00,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:34:00,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 18:34:00,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812443789] [2020-12-09 18:34:00,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 18:34:00,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:34:00,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 18:34:00,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 18:34:00,993 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-12-09 18:34:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:34:01,032 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-12-09 18:34:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:34:01,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-12-09 18:34:01,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:34:01,041 INFO L225 Difference]: With dead ends: 15 [2020-12-09 18:34:01,041 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 18:34:01,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:34:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 18:34:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 18:34:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 18:34:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 18:34:01,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 18:34:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:34:01,070 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 18:34:01,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 18:34:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 18:34:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 18:34:01,071 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:34:01,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 18:34:01,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:34:01,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:34:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:34:01,073 INFO L82 PathProgramCache]: Analyzing trace with hash 64150467, now seen corresponding path program 1 times [2020-12-09 18:34:01,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:34:01,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020719212] [2020-12-09 18:34:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:34:01,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:34:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:01,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020719212] [2020-12-09 18:34:01,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797304812] [2020-12-09 18:34:01,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/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 [2020-12-09 18:34:01,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:34:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-09 18:34:01,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:34:01,288 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-09 18:34:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:01,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:34:01,345 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 2, 1] term [2020-12-09 18:34:01,345 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 18:34:01,349 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 18:34:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:01,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1630053856] [2020-12-09 18:34:01,416 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 18:34:01,416 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:34:01,420 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:34:01,425 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:34:01,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:34:01,710 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:34:01,828 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2020-12-09 18:34:01,984 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:34:01,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:34:01,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-12-09 18:34:01,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658536692] [2020-12-09 18:34:01,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 18:34:01,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:34:01,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 18:34:01,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-09 18:34:01,987 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2020-12-09 18:34:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:34:02,099 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-12-09 18:34:02,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:34:02,100 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2020-12-09 18:34:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:34:02,100 INFO L225 Difference]: With dead ends: 12 [2020-12-09 18:34:02,100 INFO L226 Difference]: Without dead ends: 8 [2020-12-09 18:34:02,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-12-09 18:34:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-12-09 18:34:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-12-09 18:34:02,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-09 18:34:02,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2020-12-09 18:34:02,104 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2020-12-09 18:34:02,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:34:02,104 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2020-12-09 18:34:02,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 18:34:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2020-12-09 18:34:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 18:34:02,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:34:02,105 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2020-12-09 18:34:02,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 18:34:02,307 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:34:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:34:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1522376771, now seen corresponding path program 2 times [2020-12-09 18:34:02,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:34:02,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749623654] [2020-12-09 18:34:02,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:34:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:34:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749623654] [2020-12-09 18:34:02,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503352933] [2020-12-09 18:34:02,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/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 [2020-12-09 18:34:02,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 18:34:02,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:34:02,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 18:34:02,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:34:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:02,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:34:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:34:02,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1006916861] [2020-12-09 18:34:02,899 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 18:34:02,899 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:34:02,899 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 18:34:02,900 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 18:34:02,900 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 18:34:03,013 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 18:34:03,272 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 18:34:03,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:34:03,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2020-12-09 18:34:03,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750406386] [2020-12-09 18:34:03,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 18:34:03,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:34:03,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 18:34:03,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-12-09 18:34:03,273 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 15 states. [2020-12-09 18:34:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:34:03,561 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2020-12-09 18:34:03,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 18:34:03,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 7 [2020-12-09 18:34:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:34:03,562 INFO L225 Difference]: With dead ends: 16 [2020-12-09 18:34:03,562 INFO L226 Difference]: Without dead ends: 11 [2020-12-09 18:34:03,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2020-12-09 18:34:03,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-12-09 18:34:03,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-12-09 18:34:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-12-09 18:34:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-12-09 18:34:03,566 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2020-12-09 18:34:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:34:03,566 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-12-09 18:34:03,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 18:34:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-12-09 18:34:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 18:34:03,566 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:34:03,567 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2020-12-09 18:34:03,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-09 18:34:03,768 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:34:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:34:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1625233177, now seen corresponding path program 3 times [2020-12-09 18:34:03,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:34:03,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876770128] [2020-12-09 18:34:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:34:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:34:03,836 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:34:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 18:34:03,858 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 18:34:03,870 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 18:34:03,870 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 18:34:03,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-09 18:34:03,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:34:03 BoogieIcfgContainer [2020-12-09 18:34:03,887 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:34:03,888 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:34:03,888 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:34:03,888 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:34:03,888 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:34:00" (3/4) ... [2020-12-09 18:34:03,890 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 18:34:03,918 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_9d69bfba-0f02-4c2f-a093-ac17eaa2ecd3/bin/utaipan/witness.graphml [2020-12-09 18:34:03,919 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:34:03,919 INFO L168 Benchmark]: Toolchain (without parser) took 3668.62 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 86.3 MB in the beginning and 75.4 MB in the end (delta: 10.8 MB). Peak memory consumption was 73.3 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,920 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 125.8 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:34:03,920 INFO L168 Benchmark]: CACSL2BoogieTranslator took 155.36 ms. Allocated memory is still 125.8 MB. Free memory was 86.1 MB in the beginning and 76.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,920 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.73 ms. Allocated memory is still 125.8 MB. Free memory was 76.5 MB in the beginning and 75.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,921 INFO L168 Benchmark]: Boogie Preprocessor took 18.30 ms. Allocated memory is still 125.8 MB. Free memory was 75.2 MB in the beginning and 74.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:34:03,921 INFO L168 Benchmark]: RCFGBuilder took 269.19 ms. Allocated memory is still 125.8 MB. Free memory was 74.1 MB in the beginning and 99.9 MB in the end (delta: -25.8 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,921 INFO L168 Benchmark]: TraceAbstraction took 3161.43 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 99.5 MB in the beginning and 77.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 83.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,922 INFO L168 Benchmark]: Witness Printer took 30.85 ms. Allocated memory is still 186.6 MB. Free memory was 77.5 MB in the beginning and 75.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:34:03,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 125.8 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 155.36 ms. Allocated memory is still 125.8 MB. Free memory was 86.1 MB in the beginning and 76.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.73 ms. Allocated memory is still 125.8 MB. Free memory was 76.5 MB in the beginning and 75.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.30 ms. Allocated memory is still 125.8 MB. Free memory was 75.2 MB in the beginning and 74.1 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 269.19 ms. Allocated memory is still 125.8 MB. Free memory was 74.1 MB in the beginning and 99.9 MB in the end (delta: -25.8 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3161.43 ms. Allocated memory was 125.8 MB in the beginning and 186.6 MB in the end (delta: 60.8 MB). Free memory was 99.5 MB in the beginning and 77.5 MB in the end (delta: 21.9 MB). Peak memory consumption was 83.6 MB. Max. memory is 16.1 GB. * Witness Printer took 30.85 ms. Allocated memory is still 186.6 MB. Free memory was 77.5 MB in the beginning and 75.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i