./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 ................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-22 13:05:37,268 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-22 13:05:37,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-22 13:05:37,337 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-22 13:05:37,338 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-22 13:05:37,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-22 13:05:37,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-22 13:05:37,355 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-22 13:05:37,357 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-22 13:05:37,363 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-22 13:05:37,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-22 13:05:37,367 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-22 13:05:37,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-22 13:05:37,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-22 13:05:37,372 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-22 13:05:37,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-22 13:05:37,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-22 13:05:37,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-22 13:05:37,383 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-22 13:05:37,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-22 13:05:37,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-22 13:05:37,393 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-22 13:05:37,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-22 13:05:37,396 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-22 13:05:37,401 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-22 13:05:37,401 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-22 13:05:37,402 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-22 13:05:37,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-22 13:05:37,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-22 13:05:37,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-22 13:05:37,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-22 13:05:37,407 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-22 13:05:37,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-22 13:05:37,410 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-22 13:05:37,411 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-22 13:05:37,411 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-22 13:05:37,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-22 13:05:37,412 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-22 13:05:37,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-22 13:05:37,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-22 13:05:37,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-22 13:05:37,417 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-22 13:05:37,457 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-22 13:05:37,457 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-22 13:05:37,458 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-22 13:05:37,458 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-22 13:05:37,459 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-22 13:05:37,459 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-22 13:05:37,459 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-22 13:05:37,459 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-22 13:05:37,460 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-22 13:05:37,460 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-22 13:05:37,461 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-22 13:05:37,461 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-22 13:05:37,461 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-22 13:05:37,461 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-22 13:05:37,462 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-22 13:05:37,462 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-22 13:05:37,463 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-22 13:05:37,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-22 13:05:37,463 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-22 13:05:37,463 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-22 13:05:37,463 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-22 13:05:37,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-22 13:05:37,464 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-22 13:05:37,464 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-22 13:05:37,464 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-22 13:05:37,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-22 13:05:37,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-22 13:05:37,465 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-22 13:05:37,465 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-22 13:05:37,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:37,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-22 13:05:37,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-22 13:05:37,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-22 13:05:37,468 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-22 13:05:37,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-22 13:05:37,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-22 13:05:37,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-22 13:05:37,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-22 13:05:37,469 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_6cac0958-4907-458e-a31b-46b0fd802f3e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f46c7b2b1e4ea0f04ba596f18cee8c318356c44 [2020-11-22 13:05:37,683 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-22 13:05:37,711 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-22 13:05:37,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-22 13:05:37,718 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-22 13:05:37,719 INFO L275 PluginConnector]: CDTParser initialized [2020-11-22 13:05:37,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-22 13:05:37,812 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/data/7e2abdfb3/73c629ba6a294aa4bddf8add9c8b28b7/FLAG0a7d7fa43 [2020-11-22 13:05:38,231 INFO L306 CDTParser]: Found 1 translation units. [2020-11-22 13:05:38,231 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/sv-benchmarks/c/termination-crafted-lit/ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-22 13:05:38,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/data/7e2abdfb3/73c629ba6a294aa4bddf8add9c8b28b7/FLAG0a7d7fa43 [2020-11-22 13:05:38,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/data/7e2abdfb3/73c629ba6a294aa4bddf8add9c8b28b7 [2020-11-22 13:05:38,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-22 13:05:38,656 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-22 13:05:38,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:38,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-22 13:05:38,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-22 13:05:38,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798b0062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38, skipping insertion in model container [2020-11-22 13:05:38,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-22 13:05:38,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-22 13:05:38,845 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:38,857 INFO L203 MainTranslator]: Completed pre-run [2020-11-22 13:05:38,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-22 13:05:38,911 INFO L208 MainTranslator]: Completed translation [2020-11-22 13:05:38,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38 WrapperNode [2020-11-22 13:05:38,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-22 13:05:38,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:38,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-22 13:05:38,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-22 13:05:38,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,926 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,941 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-22 13:05:38,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-22 13:05:38,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-22 13:05:38,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-22 13:05:38,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... [2020-11-22 13:05:38,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-22 13:05:38,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-22 13:05:38,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-22 13:05:38,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-22 13:05:38,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-22 13:05:39,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-22 13:05:39,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-22 13:05:39,196 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-22 13:05:39,196 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-22 13:05:39,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:39 BoogieIcfgContainer [2020-11-22 13:05:39,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-22 13:05:39,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-22 13:05:39,200 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-22 13:05:39,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-22 13:05:39,213 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 01:05:38" (1/3) ... [2020-11-22 13:05:39,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbb4878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:39, skipping insertion in model container [2020-11-22 13:05:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 01:05:38" (2/3) ... [2020-11-22 13:05:39,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cbb4878 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 01:05:39, skipping insertion in model container [2020-11-22 13:05:39,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:39" (3/3) ... [2020-11-22 13:05:39,230 INFO L111 eAbstractionObserver]: Analyzing ICFG ChenFlurMukhopadhyay-SAS2012-Ex1.03.c [2020-11-22 13:05:39,240 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-22 13:05:39,244 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-22 13:05:39,269 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-22 13:05:39,306 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-22 13:05:39,306 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-22 13:05:39,307 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-22 13:05:39,307 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-22 13:05:39,307 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-22 13:05:39,307 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-22 13:05:39,308 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-22 13:05:39,308 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-22 13:05:39,319 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2020-11-22 13:05:39,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-22 13:05:39,323 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:39,324 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-22 13:05:39,324 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash 959367, now seen corresponding path program 1 times [2020-11-22 13:05:39,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:39,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744078510] [2020-11-22 13:05:39,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-22 13:05:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-22 13:05:39,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744078510] [2020-11-22 13:05:39,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-22 13:05:39,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-22 13:05:39,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687097572] [2020-11-22 13:05:39,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-22 13:05:39,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-22 13:05:39,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-22 13:05:39,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:39,562 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2020-11-22 13:05:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-22 13:05:39,617 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-22 13:05:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-22 13:05:39,619 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-22 13:05:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-22 13:05:39,626 INFO L225 Difference]: With dead ends: 15 [2020-11-22 13:05:39,626 INFO L226 Difference]: Without dead ends: 8 [2020-11-22 13:05:39,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-22 13:05:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2020-11-22 13:05:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-11-22 13:05:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-22 13:05:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-22 13:05:39,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 4 [2020-11-22 13:05:39,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-22 13:05:39,657 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-22 13:05:39,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-22 13:05:39,657 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2020-11-22 13:05:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-22 13:05:39,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-22 13:05:39,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-22 13:05:39,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-22 13:05:39,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-22 13:05:39,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-22 13:05:39,660 INFO L82 PathProgramCache]: Analyzing trace with hash 29740420, now seen corresponding path program 1 times [2020-11-22 13:05:39,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-22 13:05:39,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468830146] [2020-11-22 13:05:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-22 13:05:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:05:39,671 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:05:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-22 13:05:39,677 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-22 13:05:39,690 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-22 13:05:39,690 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-22 13:05:39,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-22 13:05:39,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 01:05:39 BoogieIcfgContainer [2020-11-22 13:05:39,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-22 13:05:39,707 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-22 13:05:39,707 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-22 13:05:39,707 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-22 13:05:39,708 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 01:05:39" (3/4) ... [2020-11-22 13:05:39,710 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-22 13:05:39,742 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6cac0958-4907-458e-a31b-46b0fd802f3e/bin/utaipan/witness.graphml [2020-11-22 13:05:39,742 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-22 13:05:39,745 INFO L168 Benchmark]: Toolchain (without parser) took 1087.20 ms. Allocated memory is still 104.9 MB. Free memory was 71.5 MB in the beginning and 46.6 MB in the end (delta: 24.9 MB). Peak memory consumption was 24.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:39,747 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory was 77.4 MB in the beginning and 77.4 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:39,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.29 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 83.1 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:39,752 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:39,753 INFO L168 Benchmark]: Boogie Preprocessor took 16.98 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.6 MB in the end (delta: 988.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-22 13:05:39,754 INFO L168 Benchmark]: RCFGBuilder took 238.55 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 71.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:39,755 INFO L168 Benchmark]: TraceAbstraction took 506.64 ms. Allocated memory is still 104.9 MB. Free memory was 70.7 MB in the beginning and 48.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:39,755 INFO L168 Benchmark]: Witness Printer took 35.32 ms. Allocated memory is still 104.9 MB. Free memory was 48.7 MB in the beginning and 46.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-22 13:05:39,764 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 104.9 MB. Free memory was 77.4 MB in the beginning and 77.4 MB in the end (delta: 27.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.29 ms. Allocated memory is still 104.9 MB. Free memory was 71.3 MB in the beginning and 83.1 MB in the end (delta: -11.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.17 ms. Allocated memory is still 104.9 MB. Free memory was 83.1 MB in the beginning and 81.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.98 ms. Allocated memory is still 104.9 MB. Free memory was 81.6 MB in the beginning and 80.6 MB in the end (delta: 988.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 238.55 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 71.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 506.64 ms. Allocated memory is still 104.9 MB. Free memory was 70.7 MB in the beginning and 48.7 MB in the end (delta: 22.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * Witness Printer took 35.32 ms. Allocated memory is still 104.9 MB. Free memory was 48.7 MB in the beginning and 46.6 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: 26]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int x, oldx; [L24] x = __VERIFIER_nondet_int() [L25] oldx = __VERIFIER_nondet_int() [L26] x > 1 && -2*x == oldx [L26] -2*x - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 SDtfs, 7 SDslu, 2 SDs, 0 SdLazy, 18 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred 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, 1 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...