./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s32iff.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_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s32iff.c -s /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/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 b7762dd94861286cddfea5d4ba6d0215ac8258ba ............................................................................................................................................................................................................................................................................................................................................................... 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 21:36:13,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:36:13,256 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:36:13,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:36:13,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:36:13,329 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:36:13,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:36:13,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:36:13,335 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:36:13,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:36:13,341 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:36:13,347 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:36:13,348 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:36:13,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:36:13,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:36:13,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:36:13,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:36:13,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:36:13,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:36:13,365 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:36:13,367 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:36:13,368 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:36:13,369 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:36:13,370 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:36:13,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:36:13,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:36:13,375 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:36:13,376 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:36:13,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:36:13,377 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:36:13,378 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:36:13,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:36:13,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:36:13,381 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:36:13,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:36:13,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:36:13,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:36:13,384 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:36:13,384 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:36:13,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:36:13,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:36:13,387 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:36:13,410 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:36:13,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:36:13,412 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:36:13,412 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:36:13,413 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:36:13,413 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:36:13,414 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:36:13,414 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:36:13,414 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:36:13,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:36:13,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:36:13,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:36:13,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:36:13,416 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:36:13,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:36:13,417 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:36:13,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:36:13,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:36:13,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:36:13,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:36:13,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:36:13,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:36:13,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:36:13,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:36:13,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:36:13,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:36:13,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:36:13,421 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:36:13,421 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:36:13,422 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_c21fe8e9-645f-48a3-9126-ff396038b0d6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7762dd94861286cddfea5d4ba6d0215ac8258ba [2020-11-29 21:36:13,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:36:13,708 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:36:13,711 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:36:13,712 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:36:13,712 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:36:13,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/../../sv-benchmarks/c/array-fpi/s32iff.c [2020-11-29 21:36:13,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/data/c1c203063/23833a2631f045c881d180e5be8263f5/FLAG3860f5758 [2020-11-29 21:36:14,240 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:36:14,241 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/sv-benchmarks/c/array-fpi/s32iff.c [2020-11-29 21:36:14,254 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/data/c1c203063/23833a2631f045c881d180e5be8263f5/FLAG3860f5758 [2020-11-29 21:36:14,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/data/c1c203063/23833a2631f045c881d180e5be8263f5 [2020-11-29 21:36:14,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:36:14,617 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:36:14,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:36:14,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:36:14,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:36:14,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:14,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ecb8d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14, skipping insertion in model container [2020-11-29 21:36:14,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:14,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:36:14,648 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:36:14,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:36:14,918 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:36:14,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:36:14,977 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:36:14,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14 WrapperNode [2020-11-29 21:36:14,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:36:14,980 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:36:14,980 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:36:14,980 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:36:14,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,008 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,039 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:36:15,040 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:36:15,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:36:15,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:36:15,049 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... [2020-11-29 21:36:15,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:36:15,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:36:15,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:36:15,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:36:15,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/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 21:36:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:36:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:36:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 21:36:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 21:36:15,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:36:15,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:36:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 21:36:15,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 21:36:15,496 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:36:15,496 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 21:36:15,498 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:36:15 BoogieIcfgContainer [2020-11-29 21:36:15,498 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:36:15,510 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:36:15,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:36:15,521 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:36:15,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:36:14" (1/3) ... [2020-11-29 21:36:15,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a453ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:36:15, skipping insertion in model container [2020-11-29 21:36:15,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:36:14" (2/3) ... [2020-11-29 21:36:15,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a453ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:36:15, skipping insertion in model container [2020-11-29 21:36:15,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:36:15" (3/3) ... [2020-11-29 21:36:15,525 INFO L111 eAbstractionObserver]: Analyzing ICFG s32iff.c [2020-11-29 21:36:15,536 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:36:15,540 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:36:15,549 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:36:15,577 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:36:15,577 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:36:15,578 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:36:15,578 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:36:15,578 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:36:15,578 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:36:15,578 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:36:15,578 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:36:15,598 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-11-29 21:36:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 21:36:15,604 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:36:15,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:36:15,605 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:36:15,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:36:15,613 INFO L82 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2020-11-29 21:36:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:36:15,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228876025] [2020-11-29 21:36:15,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:36:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:36:15,769 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 21:36:15,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228876025] [2020-11-29 21:36:15,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:36:15,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:36:15,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305752058] [2020-11-29 21:36:15,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:36:15,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:36:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:36:15,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:36:15,796 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-11-29 21:36:15,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:36:15,815 INFO L93 Difference]: Finished difference Result 43 states and 61 transitions. [2020-11-29 21:36:15,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:36:15,817 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2020-11-29 21:36:15,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:36:15,837 INFO L225 Difference]: With dead ends: 43 [2020-11-29 21:36:15,837 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 21:36:15,847 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 21:36:15,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 21:36:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-29 21:36:15,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-29 21:36:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-11-29 21:36:15,882 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2020-11-29 21:36:15,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:36:15,883 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-11-29 21:36:15,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:36:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-11-29 21:36:15,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 21:36:15,884 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:36:15,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:36:15,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:36:15,885 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:36:15,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:36:15,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2020-11-29 21:36:15,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:36:15,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893590045] [2020-11-29 21:36:15,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:36:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:36:16,037 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 21:36:16,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893590045] [2020-11-29 21:36:16,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:36:16,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:36:16,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831487481] [2020-11-29 21:36:16,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:36:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:36:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:36:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:36:16,041 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 4 states. [2020-11-29 21:36:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:36:16,210 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-11-29 21:36:16,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 21:36:16,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-29 21:36:16,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:36:16,213 INFO L225 Difference]: With dead ends: 39 [2020-11-29 21:36:16,213 INFO L226 Difference]: Without dead ends: 27 [2020-11-29 21:36:16,214 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 21:36:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-29 21:36:16,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2020-11-29 21:36:16,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-29 21:36:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2020-11-29 21:36:16,219 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2020-11-29 21:36:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:36:16,220 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2020-11-29 21:36:16,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:36:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2020-11-29 21:36:16,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-29 21:36:16,221 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:36:16,221 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:36:16,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:36:16,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:36:16,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:36:16,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2020-11-29 21:36:16,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:36:16,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471958699] [2020-11-29 21:36:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:36:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:36:16,287 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:36:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 21:36:16,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 21:36:16,360 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 21:36:16,361 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 21:36:16,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 21:36:16,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:36:16 BoogieIcfgContainer [2020-11-29 21:36:16,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:36:16,420 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:36:16,420 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:36:16,421 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:36:16,421 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:36:15" (3/4) ... [2020-11-29 21:36:16,423 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 21:36:16,477 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_c21fe8e9-645f-48a3-9126-ff396038b0d6/bin/uautomizer/witness.graphml [2020-11-29 21:36:16,478 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:36:16,484 INFO L168 Benchmark]: Toolchain (without parser) took 1861.81 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 63.5 MB in the beginning and 96.4 MB in the end (delta: -33.0 MB). Peak memory consumption was 2.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,486 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 98.6 MB. Free memory was 71.3 MB in the beginning and 71.3 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:36:16,487 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.35 ms. Allocated memory is still 98.6 MB. Free memory was 63.5 MB in the beginning and 74.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,488 INFO L168 Benchmark]: Boogie Procedure Inliner took 59.54 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 72.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,492 INFO L168 Benchmark]: Boogie Preprocessor took 53.99 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,494 INFO L168 Benchmark]: RCFGBuilder took 403.02 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 55.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,495 INFO L168 Benchmark]: TraceAbstraction took 910.06 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 54.8 MB in the beginning and 99.3 MB in the end (delta: -44.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:36:16,496 INFO L168 Benchmark]: Witness Printer took 57.41 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 96.4 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:36:16,505 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 98.6 MB. Free memory was 71.3 MB in the beginning and 71.3 MB in the end (delta: 26.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 360.35 ms. Allocated memory is still 98.6 MB. Free memory was 63.5 MB in the beginning and 74.1 MB in the end (delta: -10.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 59.54 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 72.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.99 ms. Allocated memory is still 98.6 MB. Free memory was 72.6 MB in the beginning and 71.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 403.02 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 55.3 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 910.06 ms. Allocated memory was 98.6 MB in the beginning and 134.2 MB in the end (delta: 35.7 MB). Free memory was 54.8 MB in the beginning and 99.3 MB in the end (delta: -44.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 57.41 ms. Allocated memory is still 134.2 MB. Free memory was 99.3 MB in the beginning and 96.4 MB in the end (delta: 2.9 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] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=1] [L32] COND TRUE i