./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test06.c -s /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/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 83c9fca06a756d42969949997a10968e5a1902b6 .................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:36:23,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:36:23,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:36:23,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:36:23,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:36:23,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:36:23,491 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:36:23,493 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:36:23,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:36:23,495 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:36:23,496 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:36:23,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:36:23,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:36:23,499 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:36:23,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:36:23,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:36:23,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:36:23,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:36:23,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:36:23,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:36:23,506 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:36:23,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:36:23,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:36:23,509 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:36:23,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:36:23,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:36:23,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:36:23,513 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:36:23,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:36:23,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:36:23,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:36:23,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:36:23,516 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:36:23,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:36:23,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:36:23,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:36:23,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:36:23,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:36:23,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:36:23,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:36:23,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:36:23,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:36:23,537 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:36:23,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:36:23,538 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:36:23,539 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:36:23,539 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:36:23,540 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:36:23,540 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:36:23,540 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:36:23,540 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:36:23,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:36:23,541 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:36:23,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:36:23,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:36:23,543 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:36:23,543 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:36:23,543 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_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c9fca06a756d42969949997a10968e5a1902b6 [2020-12-09 07:36:23,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:36:23,718 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:36:23,720 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:36:23,721 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:36:23,721 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:36:23,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/../../sv-benchmarks/c/ldv-regression/test06.c [2020-12-09 07:36:23,768 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/data/5be3142f5/0976ea00c2ce4f25a7d56820dc634b6b/FLAG797e517f7 [2020-12-09 07:36:24,124 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:36:24,125 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/sv-benchmarks/c/ldv-regression/test06.c [2020-12-09 07:36:24,129 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/data/5be3142f5/0976ea00c2ce4f25a7d56820dc634b6b/FLAG797e517f7 [2020-12-09 07:36:24,140 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/data/5be3142f5/0976ea00c2ce4f25a7d56820dc634b6b [2020-12-09 07:36:24,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:36:24,144 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:36:24,146 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:36:24,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:36:24,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:36:24,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,150 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c31b8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24, skipping insertion in model container [2020-12-09 07:36:24,151 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:36:24,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:36:24,278 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/sv-benchmarks/c/ldv-regression/test06.c[670,683] [2020-12-09 07:36:24,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:36:24,289 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:36:24,302 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/sv-benchmarks/c/ldv-regression/test06.c[670,683] [2020-12-09 07:36:24,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:36:24,315 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:36:24,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24 WrapperNode [2020-12-09 07:36:24,316 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:36:24,317 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:36:24,317 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:36:24,317 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:36:24,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,328 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:36:24,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:36:24,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:36:24,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:36:24,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... [2020-12-09 07:36:24,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:36:24,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:36:24,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:36:24,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:36:24,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:36:24,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 07:36:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:36:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 07:36:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:36:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 07:36:24,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:36:24,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:36:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 07:36:24,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 07:36:24,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:36:24,922 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-09 07:36:24,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:36:24 BoogieIcfgContainer [2020-12-09 07:36:24,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:36:24,925 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:36:24,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:36:24,927 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:36:24,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:36:24" (1/3) ... [2020-12-09 07:36:24,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23921f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:36:24, skipping insertion in model container [2020-12-09 07:36:24,928 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:36:24" (2/3) ... [2020-12-09 07:36:24,928 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23921f1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:36:24, skipping insertion in model container [2020-12-09 07:36:24,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:36:24" (3/3) ... [2020-12-09 07:36:24,930 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2020-12-09 07:36:24,939 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:36:24,942 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:36:24,950 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:36:24,971 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:36:24,971 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:36:24,971 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:36:24,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:36:24,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:36:24,972 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:36:24,972 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:36:24,972 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:36:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2020-12-09 07:36:24,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 07:36:24,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:36:24,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 07:36:24,985 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:36:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:36:24,991 INFO L82 PathProgramCache]: Analyzing trace with hash 57151, now seen corresponding path program 1 times [2020-12-09 07:36:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:36:24,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498699491] [2020-12-09 07:36:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:36:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:36:25,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:36:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:36:25,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:36:25,242 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:36:25,243 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:36:25,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:36:25,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:36:25 BoogieIcfgContainer [2020-12-09 07:36:25,261 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:36:25,262 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:36:25,262 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:36:25,262 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:36:25,262 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:36:24" (3/4) ... [2020-12-09 07:36:25,264 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:36:25,293 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_37c5bf10-c95e-46cf-bf77-ff0b2d4ef51f/bin/utaipan/witness.graphml [2020-12-09 07:36:25,293 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:36:25,294 INFO L168 Benchmark]: Toolchain (without parser) took 1149.11 ms. Allocated memory is still 102.8 MB. Free memory was 70.3 MB in the beginning and 54.4 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:36:25,295 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 69.2 MB. Free memory was 34.7 MB in the beginning and 34.6 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:36:25,295 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.20 ms. Allocated memory is still 102.8 MB. Free memory was 70.3 MB in the beginning and 79.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:36:25,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:36:25,296 INFO L168 Benchmark]: Boogie Preprocessor took 19.60 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 77.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:36:25,296 INFO L168 Benchmark]: RCFGBuilder took 558.75 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 39.2 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:36:25,297 INFO L168 Benchmark]: TraceAbstraction took 336.34 ms. Allocated memory is still 102.8 MB. Free memory was 38.8 MB in the beginning and 56.5 MB in the end (delta: -17.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:36:25,297 INFO L168 Benchmark]: Witness Printer took 31.43 ms. Allocated memory is still 102.8 MB. Free memory was 56.5 MB in the beginning and 54.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:36:25,299 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 69.2 MB. Free memory was 34.7 MB in the beginning and 34.6 MB in the end (delta: 67.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.20 ms. Allocated memory is still 102.8 MB. Free memory was 70.3 MB in the beginning and 79.6 MB in the end (delta: -9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.44 ms. Allocated memory is still 102.8 MB. Free memory was 79.6 MB in the beginning and 78.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.60 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 77.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 558.75 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 39.2 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 336.34 ms. Allocated memory is still 102.8 MB. Free memory was 38.8 MB in the beginning and 56.5 MB in the end (delta: -17.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 31.43 ms. Allocated memory is still 102.8 MB. Free memory was 56.5 MB in the beginning and 54.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 42]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) [L14] COND TRUE a == 4 [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L16] return 1; [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=6occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...