./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_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/ms2f.c -s /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 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 [2020-11-29 23:36:45,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 23:36:45,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 23:36:45,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 23:36:45,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 23:36:45,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 23:36:45,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 23:36:45,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 23:36:45,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 23:36:45,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 23:36:45,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 23:36:45,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 23:36:45,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 23:36:45,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 23:36:45,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 23:36:45,284 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 23:36:45,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 23:36:45,288 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 23:36:45,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 23:36:45,299 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 23:36:45,301 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 23:36:45,302 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 23:36:45,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 23:36:45,305 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 23:36:45,314 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 23:36:45,314 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 23:36:45,315 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 23:36:45,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 23:36:45,317 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 23:36:45,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 23:36:45,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 23:36:45,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 23:36:45,322 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 23:36:45,323 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 23:36:45,325 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 23:36:45,325 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 23:36:45,326 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 23:36:45,326 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 23:36:45,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 23:36:45,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 23:36:45,329 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 23:36:45,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 23:36:45,367 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 23:36:45,367 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 23:36:45,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 23:36:45,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 23:36:45,369 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 23:36:45,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 23:36:45,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 23:36:45,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 23:36:45,370 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 23:36:45,370 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 23:36:45,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 23:36:45,372 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 23:36:45,372 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 23:36:45,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 23:36:45,372 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 23:36:45,372 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 23:36:45,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 23:36:45,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 23:36:45,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 23:36:45,373 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 23:36:45,373 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 23:36:45,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:36:45,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 23:36:45,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 23:36:45,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 23:36:45,374 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 23:36:45,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 23:36:45,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 23:36:45,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 23:36:45,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab1941c3f1e3ccfc453cc61b57def578295cf9b5 [2020-11-29 23:36:45,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 23:36:45,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 23:36:45,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 23:36:45,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 23:36:45,659 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 23:36:45,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/../../sv-benchmarks/c/array-fpi/ms2f.c [2020-11-29 23:36:45,735 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/data/e87cf3b02/8fa68e899c4c4d208ccc81a7586567ec/FLAG769a43801 [2020-11-29 23:36:46,205 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 23:36:46,206 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/sv-benchmarks/c/array-fpi/ms2f.c [2020-11-29 23:36:46,213 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/data/e87cf3b02/8fa68e899c4c4d208ccc81a7586567ec/FLAG769a43801 [2020-11-29 23:36:46,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/data/e87cf3b02/8fa68e899c4c4d208ccc81a7586567ec [2020-11-29 23:36:46,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 23:36:46,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 23:36:46,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:46,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 23:36:46,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 23:36:46,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:46,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457c5936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46, skipping insertion in model container [2020-11-29 23:36:46,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:46,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 23:36:46,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 23:36:46,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:46,878 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 23:36:46,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 23:36:46,933 INFO L208 MainTranslator]: Completed translation [2020-11-29 23:36:46,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46 WrapperNode [2020-11-29 23:36:46,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 23:36:46,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 23:36:46,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 23:36:46,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 23:36:46,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:46,964 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:46,992 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 23:36:46,994 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 23:36:46,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 23:36:46,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 23:36:47,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,026 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... [2020-11-29 23:36:47,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 23:36:47,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 23:36:47,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 23:36:47,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 23:36:47,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 23:36:47,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 23:36:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 23:36:47,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 23:36:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 23:36:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 23:36:47,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 23:36:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 23:36:47,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 23:36:47,522 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 23:36:47,522 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-29 23:36:47,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:47 BoogieIcfgContainer [2020-11-29 23:36:47,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 23:36:47,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 23:36:47,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 23:36:47,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 23:36:47,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 11:36:46" (1/3) ... [2020-11-29 23:36:47,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b77d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:47, skipping insertion in model container [2020-11-29 23:36:47,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 11:36:46" (2/3) ... [2020-11-29 23:36:47,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28b77d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 11:36:47, skipping insertion in model container [2020-11-29 23:36:47,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:47" (3/3) ... [2020-11-29 23:36:47,532 INFO L111 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-11-29 23:36:47,543 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 23:36:47,547 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 23:36:47,559 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 23:36:47,584 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 23:36:47,584 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 23:36:47,584 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 23:36:47,584 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 23:36:47,584 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 23:36:47,585 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 23:36:47,585 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 23:36:47,588 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 23:36:47,599 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-29 23:36:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 23:36:47,603 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:47,604 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:47,604 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:36:47,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2020-11-29 23:36:47,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:47,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215300871] [2020-11-29 23:36:47,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:47,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215300871] [2020-11-29 23:36:47,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:47,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 23:36:47,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387705085] [2020-11-29 23:36:47,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 23:36:47,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 23:36:47,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:36:47,779 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-11-29 23:36:47,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:47,794 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2020-11-29 23:36:47,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 23:36:47,796 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-11-29 23:36:47,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:47,803 INFO L225 Difference]: With dead ends: 35 [2020-11-29 23:36:47,803 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 23:36:47,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 23:36:47,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 23:36:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-29 23:36:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-29 23:36:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-29 23:36:47,836 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2020-11-29 23:36:47,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:47,837 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-29 23:36:47,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 23:36:47,837 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-29 23:36:47,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 23:36:47,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:47,838 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:47,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 23:36:47,838 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:36:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2020-11-29 23:36:47,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:47,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696933765] [2020-11-29 23:36:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 23:36:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 23:36:47,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696933765] [2020-11-29 23:36:47,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 23:36:47,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 23:36:47,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329996435] [2020-11-29 23:36:47,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 23:36:47,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 23:36:47,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 23:36:47,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 23:36:47,975 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 4 states. [2020-11-29 23:36:48,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 23:36:48,060 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-29 23:36:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 23:36:48,061 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-29 23:36:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 23:36:48,062 INFO L225 Difference]: With dead ends: 28 [2020-11-29 23:36:48,062 INFO L226 Difference]: Without dead ends: 20 [2020-11-29 23:36:48,063 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 [2020-11-29 23:36:48,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-29 23:36:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-29 23:36:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-29 23:36:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-11-29 23:36:48,068 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 11 [2020-11-29 23:36:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 23:36:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-11-29 23:36:48,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 23:36:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-11-29 23:36:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 23:36:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 23:36:48,070 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 23:36:48,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 23:36:48,070 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 23:36:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 23:36:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2020-11-29 23:36:48,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 23:36:48,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656205302] [2020-11-29 23:36:48,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 23:36:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:36:48,137 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:36:48,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 23:36:48,192 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 23:36:48,235 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 23:36:48,236 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 23:36:48,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 23:36:48,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 11:36:48 BoogieIcfgContainer [2020-11-29 23:36:48,277 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 23:36:48,278 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 23:36:48,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 23:36:48,278 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 23:36:48,279 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 11:36:47" (3/4) ... [2020-11-29 23:36:48,281 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 23:36:48,326 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_49843c72-5940-4b09-9938-ac8e74546dc2/bin/uautomizer/witness.graphml [2020-11-29 23:36:48,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 23:36:48,333 INFO L168 Benchmark]: Toolchain (without parser) took 1741.93 ms. Allocated memory is still 90.2 MB. Free memory was 60.4 MB in the beginning and 54.6 MB in the end (delta: 5.8 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:48,334 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:36:48,334 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.77 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 69.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:48,335 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.65 ms. Allocated memory is still 90.2 MB. Free memory was 69.1 MB in the beginning and 67.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:48,336 INFO L168 Benchmark]: Boogie Preprocessor took 49.61 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:36:48,336 INFO L168 Benchmark]: RCFGBuilder took 479.85 ms. Allocated memory is still 90.2 MB. Free memory was 66.2 MB in the beginning and 52.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:48,337 INFO L168 Benchmark]: TraceAbstraction took 751.84 ms. Allocated memory is still 90.2 MB. Free memory was 52.0 MB in the beginning and 57.2 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 23:36:48,337 INFO L168 Benchmark]: Witness Printer took 52.57 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 54.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 23:36:48,340 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 71.3 MB. Free memory was 32.6 MB in the beginning and 32.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.77 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 69.1 MB in the end (delta: -9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.65 ms. Allocated memory is still 90.2 MB. Free memory was 69.1 MB in the beginning and 67.9 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.61 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 479.85 ms. Allocated memory is still 90.2 MB. Free memory was 66.2 MB in the beginning and 52.3 MB in the end (delta: 13.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 751.84 ms. Allocated memory is still 90.2 MB. Free memory was 52.0 MB in the beginning and 57.2 MB in the end (delta: -5.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.57 ms. Allocated memory is still 90.2 MB. Free memory was 57.2 MB in the beginning and 54.6 MB in the end (delta: 2.6 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; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=1] [L27] int i; [L28] int sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] i=0 VAL [N=1] [L31] COND TRUE i