./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/ms2f.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/ms2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/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 ab1941c3f1e3ccfc453cc61b57def578295cf9b5 .................................................................................................................................................................................................................................................................................................................................................... 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-a4ecdab [2020-11-30 03:41:27,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 03:41:27,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 03:41:27,538 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 03:41:27,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 03:41:27,540 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 03:41:27,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 03:41:27,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 03:41:27,552 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 03:41:27,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 03:41:27,561 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 03:41:27,563 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 03:41:27,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 03:41:27,570 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 03:41:27,573 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 03:41:27,576 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 03:41:27,579 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 03:41:27,589 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 03:41:27,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 03:41:27,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 03:41:27,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 03:41:27,612 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 03:41:27,614 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 03:41:27,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 03:41:27,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 03:41:27,629 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 03:41:27,629 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 03:41:27,631 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 03:41:27,631 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 03:41:27,633 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 03:41:27,633 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 03:41:27,634 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 03:41:27,636 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 03:41:27,637 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 03:41:27,639 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 03:41:27,639 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 03:41:27,640 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 03:41:27,641 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 03:41:27,641 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 03:41:27,643 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 03:41:27,644 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 03:41:27,645 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 03:41:27,676 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 03:41:27,676 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 03:41:27,678 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 03:41:27,678 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 03:41:27,678 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 03:41:27,679 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 03:41:27,679 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 03:41:27,679 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 03:41:27,680 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 03:41:27,680 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 03:41:27,680 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 03:41:27,681 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 03:41:27,681 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 03:41:27,681 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 03:41:27,682 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 03:41:27,683 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 03:41:27,683 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 03:41:27,683 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 03:41:27,683 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 03:41:27,684 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 03:41:27,684 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 03:41:27,684 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 03:41:27,685 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 03:41:27,685 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 03:41:27,685 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 03:41:27,685 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 03:41:27,686 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 03:41:27,686 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 03:41:27,686 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 03:41:27,687 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 03:41:27,687 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 03:41:27,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 03:41:27,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 03:41:27,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 03:41:27,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 03:41:27,688 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 03:41:27,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 03:41:27,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 03:41:27,689 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 03:41:27,690 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 03:41:27,690 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_88339a89-0b3f-42a7-b8ae-a84c74af418c/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab1941c3f1e3ccfc453cc61b57def578295cf9b5 [2020-11-30 03:41:27,972 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 03:41:28,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 03:41:28,010 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 03:41:28,012 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 03:41:28,015 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 03:41:28,017 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/../../sv-benchmarks/c/array-fpi/ms2f.c [2020-11-30 03:41:28,104 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/data/4fe03959f/d152f3bac5c14a879806c7b73b770afd/FLAG3a5fe7b20 [2020-11-30 03:41:28,720 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 03:41:28,721 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/sv-benchmarks/c/array-fpi/ms2f.c [2020-11-30 03:41:28,729 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/data/4fe03959f/d152f3bac5c14a879806c7b73b770afd/FLAG3a5fe7b20 [2020-11-30 03:41:29,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/data/4fe03959f/d152f3bac5c14a879806c7b73b770afd [2020-11-30 03:41:29,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 03:41:29,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 03:41:29,111 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 03:41:29,111 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 03:41:29,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 03:41:29,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,119 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff92e39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29, skipping insertion in model container [2020-11-30 03:41:29,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,131 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 03:41:29,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 03:41:29,371 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:41:29,392 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 03:41:29,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 03:41:29,443 INFO L208 MainTranslator]: Completed translation [2020-11-30 03:41:29,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29 WrapperNode [2020-11-30 03:41:29,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 03:41:29,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 03:41:29,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 03:41:29,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 03:41:29,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 03:41:29,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 03:41:29,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 03:41:29,509 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 03:41:29,521 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,521 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,538 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... [2020-11-30 03:41:29,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 03:41:29,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 03:41:29,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 03:41:29,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 03:41:29,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/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 [2020-11-30 03:41:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 03:41:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 03:41:29,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 03:41:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 03:41:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 03:41:29,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 03:41:29,631 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 03:41:29,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 03:41:30,274 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 03:41:30,274 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-30 03:41:30,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:41:30 BoogieIcfgContainer [2020-11-30 03:41:30,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 03:41:30,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 03:41:30,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 03:41:30,285 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 03:41:30,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 03:41:29" (1/3) ... [2020-11-30 03:41:30,286 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e456b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:41:30, skipping insertion in model container [2020-11-30 03:41:30,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 03:41:29" (2/3) ... [2020-11-30 03:41:30,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e456b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 03:41:30, skipping insertion in model container [2020-11-30 03:41:30,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:41:30" (3/3) ... [2020-11-30 03:41:30,289 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-11-30 03:41:30,304 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 03:41:30,310 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 03:41:30,326 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 03:41:30,356 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 03:41:30,356 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 03:41:30,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 03:41:30,357 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 03:41:30,357 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 03:41:30,357 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 03:41:30,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 03:41:30,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 03:41:30,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-30 03:41:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 03:41:30,379 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:41:30,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 03:41:30,381 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:41:30,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:41:30,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1531394930, now seen corresponding path program 1 times [2020-11-30 03:41:30,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:41:30,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144749759] [2020-11-30 03:41:30,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:41:30,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:41:30,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 03:41:30,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144749759] [2020-11-30 03:41:30,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:41:30,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 03:41:30,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713702345] [2020-11-30 03:41:30,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 03:41:30,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:41:30,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 03:41:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 03:41:30,751 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2020-11-30 03:41:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:41:30,810 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-11-30 03:41:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 03:41:30,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 03:41:30,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:41:30,838 INFO L225 Difference]: With dead ends: 18 [2020-11-30 03:41:30,838 INFO L226 Difference]: Without dead ends: 8 [2020-11-30 03:41:30,842 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 [2020-11-30 03:41:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-30 03:41:30,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2020-11-30 03:41:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-30 03:41:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2020-11-30 03:41:30,882 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2020-11-30 03:41:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:41:30,882 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-30 03:41:30,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 03:41:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2020-11-30 03:41:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 03:41:30,883 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:41:30,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:41:30,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 03:41:30,884 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:41:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:41:30,885 INFO L82 PathProgramCache]: Analyzing trace with hash -235910989, now seen corresponding path program 1 times [2020-11-30 03:41:30,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:41:30,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16251778] [2020-11-30 03:41:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:41:30,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 03:41:30,992 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 03:41:30,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16251778] [2020-11-30 03:41:30,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 03:41:30,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 03:41:30,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713722691] [2020-11-30 03:41:30,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 03:41:30,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 03:41:30,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 03:41:30,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 03:41:30,996 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2020-11-30 03:41:31,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 03:41:31,035 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2020-11-30 03:41:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 03:41:31,036 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 03:41:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 03:41:31,037 INFO L225 Difference]: With dead ends: 12 [2020-11-30 03:41:31,037 INFO L226 Difference]: Without dead ends: 9 [2020-11-30 03:41:31,038 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 [2020-11-30 03:41:31,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-30 03:41:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-30 03:41:31,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-30 03:41:31,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-30 03:41:31,041 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-11-30 03:41:31,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 03:41:31,042 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-30 03:41:31,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 03:41:31,042 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-30 03:41:31,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 03:41:31,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 03:41:31,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 03:41:31,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 03:41:31,043 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 03:41:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 03:41:31,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1276654522, now seen corresponding path program 1 times [2020-11-30 03:41:31,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 03:41:31,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692047083] [2020-11-30 03:41:31,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 03:41:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:41:31,138 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:41:31,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 03:41:31,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 03:41:31,253 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 03:41:31,254 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 03:41:31,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 03:41:31,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 03:41:31 BoogieIcfgContainer [2020-11-30 03:41:31,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 03:41:31,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 03:41:31,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 03:41:31,298 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 03:41:31,299 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 03:41:30" (3/4) ... [2020-11-30 03:41:31,302 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 03:41:31,357 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_88339a89-0b3f-42a7-b8ae-a84c74af418c/bin/utaipan/witness.graphml [2020-11-30 03:41:31,357 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 03:41:31,359 INFO L168 Benchmark]: Toolchain (without parser) took 2249.49 ms. Allocated memory is still 115.3 MB. Free memory was 83.6 MB in the beginning and 64.1 MB in the end (delta: 19.6 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.1 GB. [2020-11-30 03:41:31,360 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:41:31,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.03 ms. Allocated memory is still 115.3 MB. Free memory was 83.4 MB in the beginning and 91.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 03:41:31,362 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.96 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 89.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:41:31,363 INFO L168 Benchmark]: Boogie Preprocessor took 33.92 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 88.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:41:31,363 INFO L168 Benchmark]: RCFGBuilder took 733.81 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 65.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:41:31,364 INFO L168 Benchmark]: TraceAbstraction took 1017.17 ms. Allocated memory is still 115.3 MB. Free memory was 64.6 MB in the beginning and 66.2 MB in the end (delta: -1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 03:41:31,365 INFO L168 Benchmark]: Witness Printer took 59.33 ms. Allocated memory is still 115.3 MB. Free memory was 66.2 MB in the beginning and 64.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 03:41:31,369 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 81.8 MB. Free memory is still 38.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 333.03 ms. Allocated memory is still 115.3 MB. Free memory was 83.4 MB in the beginning and 91.0 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.96 ms. Allocated memory is still 115.3 MB. Free memory was 91.0 MB in the beginning and 89.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.92 ms. Allocated memory is still 115.3 MB. Free memory was 89.4 MB in the beginning and 88.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 733.81 ms. Allocated memory is still 115.3 MB. Free memory was 88.1 MB in the beginning and 65.1 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1017.17 ms. Allocated memory is still 115.3 MB. Free memory was 64.6 MB in the beginning and 66.2 MB in the end (delta: -1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 59.33 ms. Allocated memory is still 115.3 MB. Free memory was 66.2 MB in the beginning and 64.1 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: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i