./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/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 03c07d21e8c83715935a492e9413e7409ba63fe0 .............................................................................................................................................................................................................................................. 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 0.2.0-7b2dab5 [2020-12-03 12:35:57,464 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:57,467 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:57,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:57,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:57,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:57,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:57,555 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:57,558 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:57,564 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:57,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:57,568 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:57,569 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:57,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:57,574 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:57,577 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:57,578 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:57,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:57,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:57,593 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:57,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:57,597 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:57,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:57,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:57,609 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:57,610 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:57,610 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:57,613 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:57,613 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:57,615 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:57,615 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:57,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:57,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:57,620 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:57,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:57,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:57,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:57,623 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:57,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:57,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:57,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:57,631 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:35:57,671 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:57,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:57,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:57,674 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:57,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:57,674 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:57,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:57,675 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:57,675 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:57,675 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:57,676 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:57,676 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:57,677 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:57,677 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:57,677 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:57,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:57,678 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:35:57,679 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:57,679 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:57,679 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:35:57,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:57,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:35:57,680 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:35:57,680 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:35:57,680 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:57,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:35:57,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:57,681 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:57,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:57,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:57,683 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:57,684 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:35:57,684 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:57,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:57,685 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:35:57,685 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:57,685 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:57,685 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_11abd85c-806f-42a7-ba34-4183f707b90e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03c07d21e8c83715935a492e9413e7409ba63fe0 [2020-12-03 12:35:58,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:58,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:58,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:58,051 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:58,051 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:58,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2020-12-03 12:35:58,114 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/data/d280827af/77d58f45fbf94e109d460ac96eca8dd0/FLAG0f3f40303 [2020-12-03 12:35:58,688 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:58,688 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/sv-benchmarks/c/termination-crafted/RecursiveMultiplication-2.c [2020-12-03 12:35:58,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/data/d280827af/77d58f45fbf94e109d460ac96eca8dd0/FLAG0f3f40303 [2020-12-03 12:35:59,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/data/d280827af/77d58f45fbf94e109d460ac96eca8dd0 [2020-12-03 12:35:59,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:59,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:59,102 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:59,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:59,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:59,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252e7f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59, skipping insertion in model container [2020-12-03 12:35:59,110 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,117 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:59,138 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:59,329 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:59,334 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:59,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:59,361 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:59,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59 WrapperNode [2020-12-03 12:35:59,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:59,363 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:59,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:59,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:59,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:59,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:59,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:59,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:59,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,405 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... [2020-12-03 12:35:59,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:59,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:59,415 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:59,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:59,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/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 [2020-12-03 12:35:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-12-03 12:35:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-12-03 12:35:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:59,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:59,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:59,849 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:35:59,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:59 BoogieIcfgContainer [2020-12-03 12:35:59,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:59,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:59,854 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:59,857 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:59,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:59" (1/3) ... [2020-12-03 12:35:59,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1decf872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:59, skipping insertion in model container [2020-12-03 12:35:59,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:59" (2/3) ... [2020-12-03 12:35:59,859 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1decf872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:59, skipping insertion in model container [2020-12-03 12:35:59,859 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:59" (3/3) ... [2020-12-03 12:35:59,860 INFO L111 eAbstractionObserver]: Analyzing ICFG RecursiveMultiplication-2.c [2020-12-03 12:35:59,874 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:59,877 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-03 12:35:59,888 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-03 12:35:59,912 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:59,912 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:35:59,912 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:59,912 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:59,913 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:59,913 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:59,913 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:59,913 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-12-03 12:35:59,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:59,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:59,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:59,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [multErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr7ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:59,962 INFO L82 PathProgramCache]: Analyzing trace with hash 58479830, now seen corresponding path program 1 times [2020-12-03 12:35:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:59,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194185295] [2020-12-03 12:35:59,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:00,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:00,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-03 12:36:00,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-03 12:36:00,119 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-03 12:36:00,120 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-03 12:36:00,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:36:00,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:00 BoogieIcfgContainer [2020-12-03 12:36:00,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:00,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:00,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:00,148 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:00,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:59" (3/4) ... [2020-12-03 12:36:00,151 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-03 12:36:00,207 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_11abd85c-806f-42a7-ba34-4183f707b90e/bin/utaipan/witness.graphml [2020-12-03 12:36:00,207 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:00,212 INFO L168 Benchmark]: Toolchain (without parser) took 1108.65 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 65.8 MB in the beginning and 86.6 MB in the end (delta: -20.8 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:00,212 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:00,216 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.03 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 65.5 MB in the beginning and 113.9 MB in the end (delta: -48.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:00,218 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 134.2 MB. Free memory was 113.9 MB in the beginning and 112.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:00,219 INFO L168 Benchmark]: Boogie Preprocessor took 18.58 ms. Allocated memory is still 134.2 MB. Free memory was 112.4 MB in the beginning and 111.8 MB in the end (delta: 546.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:00,219 INFO L168 Benchmark]: RCFGBuilder took 437.42 ms. Allocated memory is still 134.2 MB. Free memory was 111.8 MB in the beginning and 99.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:00,220 INFO L168 Benchmark]: TraceAbstraction took 291.51 ms. Allocated memory is still 134.2 MB. Free memory was 98.7 MB in the beginning and 88.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:00,221 INFO L168 Benchmark]: Witness Printer took 59.74 ms. Allocated memory is still 134.2 MB. Free memory was 88.1 MB in the beginning and 86.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:00,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 92.3 MB. Free memory is still 49.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 260.03 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 65.5 MB in the beginning and 113.9 MB in the end (delta: -48.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.33 ms. Allocated memory is still 134.2 MB. Free memory was 113.9 MB in the beginning and 112.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.58 ms. Allocated memory is still 134.2 MB. Free memory was 112.4 MB in the beginning and 111.8 MB in the end (delta: 546.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 437.42 ms. Allocated memory is still 134.2 MB. Free memory was 111.8 MB in the beginning and 99.3 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 291.51 ms. Allocated memory is still 134.2 MB. Free memory was 98.7 MB in the beginning and 88.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Witness Printer took 59.74 ms. Allocated memory is still 134.2 MB. Free memory was 88.1 MB in the beginning and 86.6 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: integer overflow possible integer overflow possible We found a FailurePath: [L23] int m = __VERIFIER_nondet_int(); [L24] int n = __VERIFIER_nondet_int(); [L25] CALL mult(m, n) VAL [\old(m)=-2147483648, \old(n)=0] [L13] COND TRUE m < 0 VAL [\old(m)=-2147483648, \old(n)=0, m=-2147483648, n=0] [L14] -m VAL [\old(m)=-2147483648, \old(n)=0, m=-2147483648, n=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 8 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=29occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 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...