./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test28-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-regression/test28-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/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 6cb1d1a16584da5537d676558287a93525955a8e ........................................................................................................................................................................................................................................................................................................................ 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 0.2.0-69874e2 [2020-12-01 15:33:50,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:33:50,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:33:50,626 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:33:50,626 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:33:50,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:33:50,636 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:33:50,641 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:33:50,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:33:50,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:33:50,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:33:50,652 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:33:50,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:33:50,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:33:50,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:33:50,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:33:50,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:33:50,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:33:50,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:33:50,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:33:50,687 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:33:50,688 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:33:50,691 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:33:50,692 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:33:50,696 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:33:50,696 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:33:50,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:33:50,699 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:33:50,700 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:33:50,701 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:33:50,702 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:33:50,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:33:50,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:33:50,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:33:50,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:33:50,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:33:50,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:33:50,710 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:33:50,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:33:50,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:33:50,712 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:33:50,715 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-12-01 15:33:50,756 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:33:50,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:33:50,758 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:33:50,759 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:33:50,759 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:33:50,759 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:33:50,760 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:33:50,760 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:33:50,760 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:33:50,760 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:33:50,762 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-01 15:33:50,762 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-01 15:33:50,762 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-01 15:33:50,763 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:33:50,763 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:33:50,763 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:33:50,763 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-01 15:33:50,764 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:33:50,764 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:33:50,764 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-12-01 15:33:50,764 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-01 15:33:50,765 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-01 15:33:50,765 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:33:50,765 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-01 15:33:50,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-01 15:33:50,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:33:50,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-01 15:33:50,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-01 15:33:50,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:33:50,767 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_b26fde83-8873-47a5-927d-3610cd408ea3/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6cb1d1a16584da5537d676558287a93525955a8e [2020-12-01 15:33:51,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:33:51,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:33:51,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:33:51,132 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:33:51,133 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:33:51,135 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/../../sv-benchmarks/c/ldv-regression/test28-1.c [2020-12-01 15:33:51,222 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/data/059f136f6/2fb276247fba4a6ba0cbd5275e7d8845/FLAG158f32654 [2020-12-01 15:33:51,875 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:33:51,876 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/sv-benchmarks/c/ldv-regression/test28-1.c [2020-12-01 15:33:51,888 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/data/059f136f6/2fb276247fba4a6ba0cbd5275e7d8845/FLAG158f32654 [2020-12-01 15:33:52,223 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/data/059f136f6/2fb276247fba4a6ba0cbd5275e7d8845 [2020-12-01 15:33:52,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:33:52,228 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:33:52,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:33:52,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:33:52,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:33:52,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101fc76d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52, skipping insertion in model container [2020-12-01 15:33:52,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:33:52,269 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:33:52,492 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:33:52,503 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:33:52,531 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:33:52,556 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:33:52,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52 WrapperNode [2020-12-01 15:33:52,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:33:52,562 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:33:52,562 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:33:52,562 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:33:52,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,583 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:33:52,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:33:52,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:33:52,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:33:52,619 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,626 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... [2020-12-01 15:33:52,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:33:52,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:33:52,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:33:52,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:33:52,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/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 [2020-12-01 15:33:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-01 15:33:52,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:33:52,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:33:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-01 15:33:52,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:33:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:33:52,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-01 15:33:53,019 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:33:53,027 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:33:53,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:33:53 BoogieIcfgContainer [2020-12-01 15:33:53,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:33:53,034 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-01 15:33:53,036 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-01 15:33:53,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-01 15:33:53,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.12 03:33:52" (1/3) ... [2020-12-01 15:33:53,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d9c07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:33:53, skipping insertion in model container [2020-12-01 15:33:53,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:33:52" (2/3) ... [2020-12-01 15:33:53,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8d9c07f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.12 03:33:53, skipping insertion in model container [2020-12-01 15:33:53,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:33:53" (3/3) ... [2020-12-01 15:33:53,045 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2020-12-01 15:33:53,062 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-01 15:33:53,066 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-01 15:33:53,079 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-01 15:33:53,106 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-01 15:33:53,106 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-01 15:33:53,106 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-01 15:33:53,106 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:33:53,107 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:33:53,107 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-01 15:33:53,107 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:33:53,107 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-01 15:33:53,122 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-01 15:33:53,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:33:53,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:33:53,129 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:33:53,129 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:33:53,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:33:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -594068692, now seen corresponding path program 1 times [2020-12-01 15:33:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:33:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101636621] [2020-12-01 15:33:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:33:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:33:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:33:53,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101636621] [2020-12-01 15:33:53,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:33:53,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:33:53,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628993710] [2020-12-01 15:33:53,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-01 15:33:53,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:33:53,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-01 15:33:53,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-01 15:33:53,528 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-12-01 15:33:53,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:33:53,671 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-12-01 15:33:53,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-01 15:33:53,675 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-01 15:33:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:33:53,691 INFO L225 Difference]: With dead ends: 29 [2020-12-01 15:33:53,691 INFO L226 Difference]: Without dead ends: 17 [2020-12-01 15:33:53,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:33:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-01 15:33:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-12-01 15:33:53,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-12-01 15:33:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-12-01 15:33:53,740 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2020-12-01 15:33:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:33:53,741 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-12-01 15:33:53,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-01 15:33:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-12-01 15:33:53,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:33:53,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:33:53,747 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:33:53,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-01 15:33:53,748 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:33:53,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:33:53,756 INFO L82 PathProgramCache]: Analyzing trace with hash -592221650, now seen corresponding path program 1 times [2020-12-01 15:33:53,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:33:53,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522264439] [2020-12-01 15:33:53,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:33:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:33:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:33:53,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522264439] [2020-12-01 15:33:53,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:33:53,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-01 15:33:53,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347316821] [2020-12-01 15:33:53,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-01 15:33:53,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:33:53,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-01 15:33:53,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-01 15:33:53,910 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2020-12-01 15:33:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:33:54,038 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2020-12-01 15:33:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-01 15:33:54,039 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2020-12-01 15:33:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-01 15:33:54,040 INFO L225 Difference]: With dead ends: 19 [2020-12-01 15:33:54,040 INFO L226 Difference]: Without dead ends: 10 [2020-12-01 15:33:54,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:33:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-12-01 15:33:54,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-12-01 15:33:54,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-12-01 15:33:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2020-12-01 15:33:54,054 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 9 [2020-12-01 15:33:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-01 15:33:54,055 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2020-12-01 15:33:54,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-01 15:33:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2020-12-01 15:33:54,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-01 15:33:54,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-01 15:33:54,057 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:33:54,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-01 15:33:54,059 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-01 15:33:54,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:33:54,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1180938670, now seen corresponding path program 1 times [2020-12-01 15:33:54,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:33:54,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118346072] [2020-12-01 15:33:54,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:33:54,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:33:54,110 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:33:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:33:54,130 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:33:54,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:33:54,153 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-01 15:33:54,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-01 15:33:54,200 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.12 03:33:54 BoogieIcfgContainer [2020-12-01 15:33:54,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-01 15:33:54,208 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:33:54,209 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:33:54,209 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:33:54,210 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:33:53" (3/4) ... [2020-12-01 15:33:54,212 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-01 15:33:54,254 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b26fde83-8873-47a5-927d-3610cd408ea3/bin/uautomizer/witness.graphml [2020-12-01 15:33:54,259 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:33:54,263 INFO L168 Benchmark]: Toolchain (without parser) took 2032.69 ms. Allocated memory was 100.7 MB in the beginning and 125.8 MB in the end (delta: 25.2 MB). Free memory was 72.7 MB in the beginning and 101.5 MB in the end (delta: -28.8 MB). Peak memory consumption was 34.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,263 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 59.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:33:54,266 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.28 ms. Allocated memory is still 100.7 MB. Free memory was 72.5 MB in the beginning and 76.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,267 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.46 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,273 INFO L168 Benchmark]: Boogie Preprocessor took 22.55 ms. Allocated memory is still 100.7 MB. Free memory was 75.3 MB in the beginning and 74.3 MB in the end (delta: 974.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:33:54,275 INFO L168 Benchmark]: RCFGBuilder took 398.71 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 61.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,276 INFO L168 Benchmark]: TraceAbstraction took 1174.18 ms. Allocated memory was 100.7 MB in the beginning and 125.8 MB in the end (delta: 25.2 MB). Free memory was 61.3 MB in the beginning and 66.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,281 INFO L168 Benchmark]: Witness Printer took 51.34 ms. Allocated memory is still 125.8 MB. Free memory was 66.5 MB in the beginning and 101.5 MB in the end (delta: -35.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:33:54,284 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 100.7 MB. Free memory is still 59.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.28 ms. Allocated memory is still 100.7 MB. Free memory was 72.5 MB in the beginning and 76.9 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.46 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 75.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.55 ms. Allocated memory is still 100.7 MB. Free memory was 75.3 MB in the beginning and 74.3 MB in the end (delta: 974.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 398.71 ms. Allocated memory is still 100.7 MB. Free memory was 74.3 MB in the beginning and 61.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1174.18 ms. Allocated memory was 100.7 MB in the beginning and 125.8 MB in the end (delta: 25.2 MB). Free memory was 61.3 MB in the beginning and 66.5 MB in the end (delta: -5.2 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 51.34 ms. Allocated memory is still 125.8 MB. Free memory was 66.5 MB in the beginning and 101.5 MB in the end (delta: -35.0 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 [L22] COND TRUE pd == &d2 && d2.b != 0 [L3] __assert_fail("0", "test28-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 45 SDslu, 26 SDs, 0 SdLazy, 60 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred 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: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 280 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...