./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/brs3f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/brs3f.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI --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 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 [2021-10-11 02:31:25,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:31:25,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:31:25,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:31:25,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:31:25,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:31:25,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:31:25,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:31:25,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:31:25,597 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:31:25,598 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:31:25,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:31:25,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:31:25,603 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:31:25,604 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:31:25,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:31:25,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:31:25,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:31:25,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:31:25,622 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:31:25,624 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:31:25,626 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:31:25,629 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:31:25,630 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:31:25,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:31:25,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:31:25,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:31:25,642 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:31:25,643 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:31:25,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:31:25,645 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:31:25,646 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:31:25,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:31:25,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:31:25,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:31:25,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:31:25,652 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:31:25,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:31:25,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:31:25,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:31:25,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:31:25,657 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:31:25,697 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:31:25,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:31:25,699 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:31:25,699 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:31:25,700 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:31:25,700 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:31:25,700 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:31:25,700 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:31:25,701 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:31:25,701 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:31:25,702 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:31:25,702 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:31:25,703 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:31:25,703 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:31:25,703 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:31:25,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:31:25,704 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:31:25,704 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:31:25,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:31:25,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:31:25,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:31:25,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:31:25,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:31:25,706 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:31:25,706 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:31:25,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:31:25,707 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:31:25,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:31:25,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:31:25,709 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:31:25,709 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:31:25,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:31:25,710 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:31:25,710 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:31:25,710 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:31:25,711 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:31:25,711 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:31:25,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:31:25,711 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:31:25,712 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_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a6b49f9c2a6d2eda01ab26465c2ce5a73ff1827 [2021-10-11 02:31:25,997 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:31:26,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:31:26,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:31:26,022 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:31:26,023 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:31:26,024 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/brs3f.c [2021-10-11 02:31:26,093 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/data/74ea9987a/7e3c3cd107824716970280c3ce7d4a7b/FLAG74587d645 [2021-10-11 02:31:26,619 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:31:26,620 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/sv-benchmarks/c/array-fpi/brs3f.c [2021-10-11 02:31:26,632 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/data/74ea9987a/7e3c3cd107824716970280c3ce7d4a7b/FLAG74587d645 [2021-10-11 02:31:26,993 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/data/74ea9987a/7e3c3cd107824716970280c3ce7d4a7b [2021-10-11 02:31:26,995 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:31:26,997 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:31:26,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:26,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:31:27,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:31:27,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:26" (1/1) ... [2021-10-11 02:31:27,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491e88de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27, skipping insertion in model container [2021-10-11 02:31:27,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:31:26" (1/1) ... [2021-10-11 02:31:27,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:31:27,029 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:31:27,224 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2021-10-11 02:31:27,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:27,248 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:31:27,261 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/sv-benchmarks/c/array-fpi/brs3f.c[588,601] [2021-10-11 02:31:27,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:31:27,285 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:31:27,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27 WrapperNode [2021-10-11 02:31:27,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:31:27,287 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:27,287 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:31:27,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:31:27,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,302 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,321 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:31:27,322 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:31:27,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:31:27,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:31:27,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,339 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,343 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... [2021-10-11 02:31:27,347 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:31:27,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:31:27,348 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:31:27,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:31:27,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:31:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:31:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:31:27,431 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:31:27,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:31:27,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:31:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:31:27,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:31:27,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:31:27,883 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:31:27,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:27 BoogieIcfgContainer [2021-10-11 02:31:27,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:31:27,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:31:27,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:31:27,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:31:27,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:31:26" (1/3) ... [2021-10-11 02:31:27,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32309abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:27, skipping insertion in model container [2021-10-11 02:31:27,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:31:27" (2/3) ... [2021-10-11 02:31:27,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32309abf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:31:27, skipping insertion in model container [2021-10-11 02:31:27,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:27" (3/3) ... [2021-10-11 02:31:27,894 INFO L111 eAbstractionObserver]: Analyzing ICFG brs3f.c [2021-10-11 02:31:27,918 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:31:27,921 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:31:27,932 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:31:27,956 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:31:27,957 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:31:27,957 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:31:27,957 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:31:27,957 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:31:27,957 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:31:27,958 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:31:27,958 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:31:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:31:27,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:31:27,978 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:27,979 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:31:27,979 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:27,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:27,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1441693108, now seen corresponding path program 1 times [2021-10-11 02:31:27,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:27,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001648702] [2021-10-11 02:31:27,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:28,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001648702] [2021-10-11 02:31:28,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:31:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364722094] [2021-10-11 02:31:28,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:31:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:31:28,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:28,306 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:31:28,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,380 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:31:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:31:28,383 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:31:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,398 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:31:28,398 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:31:28,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:31:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:31:28,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:31:28,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:31:28,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:31:28,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:31:28,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,442 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:31:28,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:31:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:31:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:31:28,443 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:28,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:31:28,444 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1744495143, now seen corresponding path program 1 times [2021-10-11 02:31:28,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780466798] [2021-10-11 02:31:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780466798] [2021-10-11 02:31:28,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:31:28,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:31:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408717694] [2021-10-11 02:31:28,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:31:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:28,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:31:28,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,592 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:31:28,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:28,636 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:31:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:31:28,637 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:31:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:28,639 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:31:28,640 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:31:28,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:31:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:31:28,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:31:28,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:31:28,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:31:28,650 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:31:28,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:28,651 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:31:28,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:31:28,651 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:31:28,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:31:28,652 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:28,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:28,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:31:28,654 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1755182165, now seen corresponding path program 1 times [2021-10-11 02:31:28,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:28,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526398756] [2021-10-11 02:31:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:31:28,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526398756] [2021-10-11 02:31:28,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245394074] [2021-10-11 02:31:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:28,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:31:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:29,112 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:31:29,119 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:29,126 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:29,127 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:31:29,128 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2021-10-11 02:31:29,195 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:31:29,206 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:31:29,244 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:31:29,250 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:31:29,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 02:31:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:29,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:29,353 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:31:29,383 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:31:29,384 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-10-11 02:31:29,389 INFO L639 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2021-10-11 02:31:29,397 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:31:29,409 INFO L625 ElimStorePlain]: treesize reduction 5, result has 64.3 percent of original size [2021-10-11 02:31:29,409 INFO L547 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2021-10-11 02:31:29,411 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:34, output treesize:9 [2021-10-11 02:31:29,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:29,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [666531383] [2021-10-11 02:31:29,521 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:29,521 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:29,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:29,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:29,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:29,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:29,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:30,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:30,295 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:30,759 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:30,911 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:31,128 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:31:31,279 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:31:31,441 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:31:31,652 WARN L197 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:31:31,655 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:31,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:31,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2021-10-11 02:31:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147024258] [2021-10-11 02:31:31,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:31:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:31:31,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:31:31,658 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 15 states. [2021-10-11 02:31:31,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:31,857 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:31:31,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:31:31,858 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 8 [2021-10-11 02:31:31,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:31,859 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:31:31,859 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:31:31,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:31:31,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:31:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2021-10-11 02:31:31,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:31:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:31:31,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2021-10-11 02:31:31,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:31,863 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:31:31,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:31:31,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:31:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:31:31,863 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:31,865 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:32,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:31:32,066 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:32,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1423970983, now seen corresponding path program 2 times [2021-10-11 02:31:32,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:32,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808402186] [2021-10-11 02:31:32,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:31:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808402186] [2021-10-11 02:31:32,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240497592] [2021-10-11 02:31:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:31:32,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:31:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:31:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:31:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:31:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:32,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:31:32,293 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:31:32,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1259400773] [2021-10-11 02:31:32,297 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:31:32,297 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:31:32,298 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:31:32,298 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:31:32,298 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:31:32,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,543 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,612 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:31:32,990 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:31:33,178 WARN L197 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-10-11 02:31:33,445 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:31:33,624 WARN L197 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-10-11 02:31:33,625 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:31:33,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:31:33,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-10-11 02:31:33,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446417221] [2021-10-11 02:31:33,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:31:33,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:31:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:31:33,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:31:33,628 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 10 states. [2021-10-11 02:31:33,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:31:33,677 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2021-10-11 02:31:33,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:31:33,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2021-10-11 02:31:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:31:33,678 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:31:33,678 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:31:33,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:31:33,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:31:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:31:33,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:31:33,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:31:33,682 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:31:33,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:31:33,682 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:31:33,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:31:33,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:31:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:31:33,683 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:31:33,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:31:33,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-11 02:31:33,896 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:31:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:31:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1526893228, now seen corresponding path program 3 times [2021-10-11 02:31:33,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:31:33,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360007391] [2021-10-11 02:31:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:31:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:33,977 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:31:34,050 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:31:34,068 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:31:34,076 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:31:34,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-10-11 02:31:34,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:31:34 BoogieIcfgContainer [2021-10-11 02:31:34,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:31:34,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:31:34,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:31:34,126 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:31:34,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:31:27" (3/4) ... [2021-10-11 02:31:34,128 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:31:34,198 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9759dbf0-92fe-4835-83f3-e6dd04f891fd/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:31:34,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:31:34,199 INFO L168 Benchmark]: Toolchain (without parser) took 7202.03 ms. Allocated memory was 111.1 MB in the beginning and 174.1 MB in the end (delta: 62.9 MB). Free memory was 81.6 MB in the beginning and 114.0 MB in the end (delta: -32.5 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,200 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 67.9 MB in the beginning and 67.8 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:31:34,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.91 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 86.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,201 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.02 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,201 INFO L168 Benchmark]: Boogie Preprocessor took 24.94 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 83.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,201 INFO L168 Benchmark]: RCFGBuilder took 537.59 ms. Allocated memory is still 111.1 MB. Free memory was 82.9 MB in the beginning and 58.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,202 INFO L168 Benchmark]: TraceAbstraction took 6237.85 ms. Allocated memory was 111.1 MB in the beginning and 174.1 MB in the end (delta: 62.9 MB). Free memory was 58.4 MB in the beginning and 116.1 MB in the end (delta: -57.7 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,202 INFO L168 Benchmark]: Witness Printer took 72.85 ms. Allocated memory is still 174.1 MB. Free memory was 116.1 MB in the beginning and 114.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:31:34,205 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 111.1 MB. Free memory was 67.9 MB in the beginning and 67.8 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 286.91 ms. Allocated memory is still 111.1 MB. Free memory was 81.3 MB in the beginning and 86.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.02 ms. Allocated memory is still 111.1 MB. Free memory was 86.0 MB in the beginning and 84.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.94 ms. Allocated memory is still 111.1 MB. Free memory was 84.3 MB in the beginning and 83.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 537.59 ms. Allocated memory is still 111.1 MB. Free memory was 82.9 MB in the beginning and 58.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6237.85 ms. Allocated memory was 111.1 MB in the beginning and 174.1 MB in the end (delta: 62.9 MB). Free memory was 58.4 MB in the beginning and 116.1 MB in the end (delta: -57.7 MB). Peak memory consumption was 6.6 MB. Max. memory is 16.1 GB. * Witness Printer took 72.85 ms. Allocated memory is still 174.1 MB. Free memory was 116.1 MB in the beginning and 114.0 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: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=2] [L31] COND TRUE i