./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.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_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/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 500cb8735f650eb0e7c33062ddc23c2166b17f19 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:55:46,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:55:46,377 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:55:46,424 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:55:46,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:55:46,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:55:46,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:55:46,431 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:55:46,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:55:46,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:55:46,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:55:46,438 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:55:46,439 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:55:46,440 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:55:46,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:55:46,446 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:55:46,447 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:55:46,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:55:46,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:55:46,454 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:55:46,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:55:46,467 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:55:46,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:55:46,473 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:55:46,482 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:55:46,483 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:55:46,483 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:55:46,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:55:46,485 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:55:46,486 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:55:46,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:55:46,487 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:55:46,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:55:46,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:55:46,494 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:55:46,495 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:55:46,496 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:55:46,496 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:55:46,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:55:46,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:55:46,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:55:46,501 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-30 01:55:46,539 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:55:46,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:55:46,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:55:46,540 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:55:46,541 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:55:46,541 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:55:46,541 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:55:46,541 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:55:46,542 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:55:46,542 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:55:46,542 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:55:46,542 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:55:46,543 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:55:46,543 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:55:46,543 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:55:46,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:55:46,544 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:55:46,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:55:46,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:55:46,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:55:46,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:55:46,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:55:46,545 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-30 01:55:46,546 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:55:46,546 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:55:46,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:55:46,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:55:46,547 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:55:46,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:55:46,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:55:46,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:55:46,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:55:46,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:55:46,548 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:55:46,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:55:46,549 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:55:46,549 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:55:46,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:55:46,549 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_60b31835-8e76-46c8-a673-441db89075e0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 500cb8735f650eb0e7c33062ddc23c2166b17f19 [2020-11-30 01:55:46,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:55:46,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:55:46,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:55:46,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:55:46,832 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:55:46,833 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-30 01:55:46,927 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/data/be12d3628/b76bd35f88544188b4f144aa1c8e4eb3/FLAGa326f3c29 [2020-11-30 01:55:47,385 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:55:47,386 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-30 01:55:47,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/data/be12d3628/b76bd35f88544188b4f144aa1c8e4eb3/FLAGa326f3c29 [2020-11-30 01:55:47,776 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/data/be12d3628/b76bd35f88544188b4f144aa1c8e4eb3 [2020-11-30 01:55:47,778 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:55:47,780 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:55:47,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:55:47,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:55:47,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:55:47,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:55:47" (1/1) ... [2020-11-30 01:55:47,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd89a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:47, skipping insertion in model container [2020-11-30 01:55:47,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:55:47" (1/1) ... [2020-11-30 01:55:47,809 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:55:47,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:55:47,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:55:47,988 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:55:48,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:55:48,019 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:55:48,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48 WrapperNode [2020-11-30 01:55:48,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:55:48,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:55:48,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:55:48,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:55:48,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:55:48,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:55:48,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:55:48,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:55:48,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,068 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,069 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... [2020-11-30 01:55:48,071 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:55:48,072 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:55:48,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:55:48,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:55:48,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/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 [2020-11-30 01:55:48,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:55:48,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:55:48,381 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:55:48,381 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-30 01:55:48,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:55:48 BoogieIcfgContainer [2020-11-30 01:55:48,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:55:48,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:55:48,386 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:55:48,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:55:48,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:55:47" (1/3) ... [2020-11-30 01:55:48,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a0ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:55:48, skipping insertion in model container [2020-11-30 01:55:48,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:55:48" (2/3) ... [2020-11-30 01:55:48,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57a0ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:55:48, skipping insertion in model container [2020-11-30 01:55:48,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:55:48" (3/3) ... [2020-11-30 01:55:48,412 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-11-30 01:55:48,424 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:55:48,434 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-11-30 01:55:48,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-11-30 01:55:48,481 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:55:48,482 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:55:48,482 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:55:48,482 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:55:48,482 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:55:48,483 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:55:48,483 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:55:48,484 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:55:48,520 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-11-30 01:55:48,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:55:48,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:48,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:55:48,527 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:48,534 INFO L82 PathProgramCache]: Analyzing trace with hash 29684842, now seen corresponding path program 1 times [2020-11-30 01:55:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:48,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426455432] [2020-11-30 01:55:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:48,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:48,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426455432] [2020-11-30 01:55:48,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:55:48,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:55:48,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203912308] [2020-11-30 01:55:48,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:55:48,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:48,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:55:48,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:48,718 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-11-30 01:55:48,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:48,782 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-11-30 01:55:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:55:48,784 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:55:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:48,792 INFO L225 Difference]: With dead ends: 21 [2020-11-30 01:55:48,792 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 01:55:48,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:48,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 01:55:48,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-11-30 01:55:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:55:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-11-30 01:55:48,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-11-30 01:55:48,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:48,825 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-11-30 01:55:48,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:55:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-11-30 01:55:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:55:48,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:48,826 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 01:55:48,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:55:48,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash 29685034, now seen corresponding path program 1 times [2020-11-30 01:55:48,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:48,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498752008] [2020-11-30 01:55:48,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:48,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498752008] [2020-11-30 01:55:48,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:55:48,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:55:48,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201514181] [2020-11-30 01:55:48,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:55:48,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:48,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:55:48,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:48,879 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-11-30 01:55:48,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:48,924 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-11-30 01:55:48,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:55:48,924 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 01:55:48,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:48,925 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:55:48,925 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:55:48,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:48,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:55:48,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:55:48,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:55:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-11-30 01:55:48,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2020-11-30 01:55:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:48,932 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-11-30 01:55:48,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:55:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-11-30 01:55:48,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:55:48,932 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:48,933 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:55:48,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:55:48,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:48,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:48,934 INFO L82 PathProgramCache]: Analyzing trace with hash 920230152, now seen corresponding path program 1 times [2020-11-30 01:55:48,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:48,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625784339] [2020-11-30 01:55:48,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:48,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625784339] [2020-11-30 01:55:48,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:55:48,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:55:48,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750408598] [2020-11-30 01:55:48,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:55:48,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:55:48,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:48,988 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-11-30 01:55:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:49,010 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-11-30 01:55:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:55:49,012 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 01:55:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:49,013 INFO L225 Difference]: With dead ends: 17 [2020-11-30 01:55:49,013 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 01:55:49,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:55:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 01:55:49,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 01:55:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 01:55:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-30 01:55:49,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2020-11-30 01:55:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:49,018 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-30 01:55:49,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:55:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-30 01:55:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:55:49,023 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:49,023 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-11-30 01:55:49,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:55:49,025 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:49,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash -199749339, now seen corresponding path program 1 times [2020-11-30 01:55:49,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:49,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047992908] [2020-11-30 01:55:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:49,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047992908] [2020-11-30 01:55:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775399358] [2020-11-30 01:55:49,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:49,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:55:49,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:55:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:49,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:55:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:55:49,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334612557] [2020-11-30 01:55:49,241 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:55:49,242 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:55:49,247 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:55:49,253 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:55:49,254 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:55:49,540 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:55:49,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:55:49,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-11-30 01:55:49,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110756124] [2020-11-30 01:55:49,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:55:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:55:49,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:55:49,731 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-11-30 01:55:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:49,811 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 01:55:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:55:49,812 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 01:55:49,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:49,813 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:55:49,813 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:55:49,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-30 01:55:49,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:55:49,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-11-30 01:55:49,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 01:55:49,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 01:55:49,819 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2020-11-30 01:55:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:49,820 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 01:55:49,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:55:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 01:55:49,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 01:55:49,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:49,821 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:55:50,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:50,021 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:50,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:50,022 INFO L82 PathProgramCache]: Analyzing trace with hash 610055194, now seen corresponding path program 1 times [2020-11-30 01:55:50,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:50,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722185145] [2020-11-30 01:55:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722185145] [2020-11-30 01:55:50,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175579266] [2020-11-30 01:55:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:50,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:55:50,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:55:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:50,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:55:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:50,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [727759713] [2020-11-30 01:55:50,208 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:55:50,209 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:55:50,209 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:55:50,209 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:55:50,210 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:55:50,512 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:55:50,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:55:50,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2020-11-30 01:55:50,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682879455] [2020-11-30 01:55:50,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:55:50,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:50,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:55:50,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-30 01:55:50,515 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-11-30 01:55:50,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:50,758 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-11-30 01:55:50,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 01:55:50,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-30 01:55:50,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:50,759 INFO L225 Difference]: With dead ends: 63 [2020-11-30 01:55:50,759 INFO L226 Difference]: Without dead ends: 51 [2020-11-30 01:55:50,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:55:50,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-30 01:55:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-11-30 01:55:50,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-30 01:55:50,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-11-30 01:55:50,778 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2020-11-30 01:55:50,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:50,778 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-11-30 01:55:50,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:55:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-11-30 01:55:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:55:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:50,781 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:55:50,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-30 01:55:50,995 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:50,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:50,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1977014293, now seen corresponding path program 1 times [2020-11-30 01:55:50,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:50,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110711045] [2020-11-30 01:55:50,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:51,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:51,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110711045] [2020-11-30 01:55:51,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532983501] [2020-11-30 01:55:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:51,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:55:51,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:55:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:51,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:55:51,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:55:51,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1682452442] [2020-11-30 01:55:51,110 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:55:51,110 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:55:51,110 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:55:51,110 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:55:51,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:55:51,327 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:55:51,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:55:51,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-11-30 01:55:51,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93939798] [2020-11-30 01:55:51,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:55:51,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:55:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:55:51,329 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2020-11-30 01:55:51,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:51,382 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-11-30 01:55:51,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:55:51,384 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 01:55:51,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:51,387 INFO L225 Difference]: With dead ends: 110 [2020-11-30 01:55:51,387 INFO L226 Difference]: Without dead ends: 109 [2020-11-30 01:55:51,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:55:51,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-30 01:55:51,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-11-30 01:55:51,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-30 01:55:51,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-11-30 01:55:51,423 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 17 [2020-11-30 01:55:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:51,423 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-11-30 01:55:51,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:55:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-11-30 01:55:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 01:55:51,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:51,424 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-30 01:55:51,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:51,651 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:51,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1157906947, now seen corresponding path program 1 times [2020-11-30 01:55:51,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:51,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671067533] [2020-11-30 01:55:51,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:51,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 01:55:51,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671067533] [2020-11-30 01:55:51,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:55:51,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:55:51,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820746242] [2020-11-30 01:55:51,703 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:55:51,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:51,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:55:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:55:51,704 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 4 states. [2020-11-30 01:55:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:51,730 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-11-30 01:55:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:55:51,731 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-11-30 01:55:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:51,732 INFO L225 Difference]: With dead ends: 96 [2020-11-30 01:55:51,732 INFO L226 Difference]: Without dead ends: 95 [2020-11-30 01:55:51,733 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 [2020-11-30 01:55:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-30 01:55:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-11-30 01:55:51,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-30 01:55:51,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-11-30 01:55:51,753 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 18 [2020-11-30 01:55:51,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:51,753 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-11-30 01:55:51,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:55:51,753 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-11-30 01:55:51,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 01:55:51,757 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:51,757 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2020-11-30 01:55:51,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-11-30 01:55:51,757 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:51,758 INFO L82 PathProgramCache]: Analyzing trace with hash 907494726, now seen corresponding path program 2 times [2020-11-30 01:55:51,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:51,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291794210] [2020-11-30 01:55:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:55:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291794210] [2020-11-30 01:55:51,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180455953] [2020-11-30 01:55:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-30 01:55:51,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 01:55:51,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:55:51,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 01:55:51,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:51,947 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-30 01:55:51,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:55:51,991 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-11-30 01:55:51,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1632516488] [2020-11-30 01:55:51,994 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:55:51,994 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:55:51,995 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:55:51,995 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:55:51,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:55:52,215 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:55:52,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:55:52,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2020-11-30 01:55:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383957124] [2020-11-30 01:55:52,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:55:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:55:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:55:52,218 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 14 states. [2020-11-30 01:55:52,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:52,399 INFO L93 Difference]: Finished difference Result 215 states and 260 transitions. [2020-11-30 01:55:52,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:55:52,401 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-11-30 01:55:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:52,405 INFO L225 Difference]: With dead ends: 215 [2020-11-30 01:55:52,405 INFO L226 Difference]: Without dead ends: 136 [2020-11-30 01:55:52,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:55:52,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-30 01:55:52,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2020-11-30 01:55:52,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-30 01:55:52,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-11-30 01:55:52,430 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 29 [2020-11-30 01:55:52,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:52,430 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-11-30 01:55:52,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:55:52,430 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-11-30 01:55:52,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-30 01:55:52,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:55:52,432 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-11-30 01:55:52,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:52,650 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-30 01:55:52,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:55:52,650 INFO L82 PathProgramCache]: Analyzing trace with hash 2128580005, now seen corresponding path program 2 times [2020-11-30 01:55:52,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:55:52,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233111842] [2020-11-30 01:55:52,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:55:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:55:52,752 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-11-30 01:55:52,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233111842] [2020-11-30 01:55:52,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191075500] [2020-11-30 01:55:52,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:55:52,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-11-30 01:55:52,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:55:52,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:55:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:55:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 01:55:52,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:55:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-11-30 01:55:52,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175220495] [2020-11-30 01:55:52,821 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:55:52,822 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:55:52,822 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:55:52,822 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:55:52,823 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:55:53,040 FATAL L? ?]: Ignoring exception! java.util.ConcurrentModificationException at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.FixpointLoopSummarizer.summarize(FixpointLoopSummarizer.java:94) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretLoop(DagInterpreter.java:177) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:168) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 01:55:53,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:55:53,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2020-11-30 01:55:53,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734935025] [2020-11-30 01:55:53,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:55:53,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:55:53,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:55:53,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:55:53,043 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 4 states. [2020-11-30 01:55:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:55:53,070 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-11-30 01:55:53,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:55:53,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-11-30 01:55:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:55:53,072 INFO L225 Difference]: With dead ends: 95 [2020-11-30 01:55:53,072 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:55:53,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:55:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:55:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:55:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:55:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:55:53,074 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-11-30 01:55:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:55:53,074 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:55:53,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:55:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:55:53,075 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:55:53,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-11-30 01:55:53,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 01:55:53,542 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-30 01:55:53,545 INFO L274 CegarLoopResult]: For program point L21(lines 21 26) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L270 CegarLoopResult]: At program point L21-2(lines 20 27) the Hoare annotation is: (let ((.cse0 (<= 0 (+ ULTIMATE.start_main_~n~0 2147483648))) (.cse4 (<= 1 ULTIMATE.start_main_~i~0)) (.cse1 (< ULTIMATE.start_main_~m~0 2147483647)) (.cse2 (<= 0 ULTIMATE.start_main_~j~0)) (.cse3 (<= ULTIMATE.start_main_~n~0 2147483647)) (.cse5 (<= 1 ULTIMATE.start_main_~m~0)) (.cse6 (<= ULTIMATE.start_main_~j~0 2147483646))) (or (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~j~0 0) .cse3 .cse4 .cse5) (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~i~0 2147483646) .cse3 .cse4 .cse5 .cse6) (and .cse1 .cse2 (= ULTIMATE.start_main_~i~0 0) (< ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~n~0) .cse3 .cse5 .cse6))) [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point L17(lines 17 28) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L277 CegarLoopResult]: At program point L17-1(lines 17 28) the Hoare annotation is: true [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-11-30 01:55:53,546 INFO L274 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-11-30 01:55:53,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:55:53 BoogieIcfgContainer [2020-11-30 01:55:53,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:55:53,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:55:53,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:55:53,579 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:55:53,579 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:55:48" (3/4) ... [2020-11-30 01:55:53,582 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:55:53,594 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-30 01:55:53,594 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 01:55:53,594 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:55:53,645 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_60b31835-8e76-46c8-a673-441db89075e0/bin/utaipan/witness.graphml [2020-11-30 01:55:53,645 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:55:53,647 INFO L168 Benchmark]: Toolchain (without parser) took 5866.28 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 68.9 MB in the beginning and 74.2 MB in the end (delta: -5.3 MB). Peak memory consumption was 42.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,651 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 33.1 MB in the beginning and 33.1 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:55:53,653 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 100.7 MB. Free memory was 68.7 MB in the beginning and 79.0 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,654 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.95 ms. Allocated memory is still 100.7 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:55:53,654 INFO L168 Benchmark]: Boogie Preprocessor took 18.63 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 76.9 MB in the end (delta: 900.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,655 INFO L168 Benchmark]: RCFGBuilder took 312.19 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 66.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,655 INFO L168 Benchmark]: TraceAbstraction took 5192.52 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 65.9 MB in the beginning and 76.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,655 INFO L168 Benchmark]: Witness Printer took 67.14 ms. Allocated memory is still 148.9 MB. Free memory was 76.3 MB in the beginning and 74.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:55:53,658 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 75.5 MB. Free memory was 33.1 MB in the beginning and 33.1 MB in the end (delta: 38.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.09 ms. Allocated memory is still 100.7 MB. Free memory was 68.7 MB in the beginning and 79.0 MB in the end (delta: -10.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.95 ms. Allocated memory is still 100.7 MB. Free memory was 79.0 MB in the beginning and 77.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.63 ms. Allocated memory is still 100.7 MB. Free memory was 77.8 MB in the beginning and 76.9 MB in the end (delta: 900.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 312.19 ms. Allocated memory is still 100.7 MB. Free memory was 76.9 MB in the beginning and 66.4 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5192.52 ms. Allocated memory was 100.7 MB in the beginning and 148.9 MB in the end (delta: 48.2 MB). Free memory was 65.9 MB in the beginning and 76.3 MB in the end (delta: -10.4 MB). Peak memory consumption was 38.8 MB. Max. memory is 16.1 GB. * Witness Printer took 67.14 ms. Allocated memory is still 148.9 MB. Free memory was 76.3 MB in the beginning and 74.2 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: - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 22]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (((((((0 <= n + 2147483648 && m < 2147483647) && 0 <= j) && j <= 0) && n <= 2147483647) && 1 <= i) && 1 <= m) || (((((((0 <= n + 2147483648 && m < 2147483647) && 0 <= j) && i <= 2147483646) && n <= 2147483647) && 1 <= i) && 1 <= m) && j <= 2147483646)) || ((((((m < 2147483647 && 0 <= j) && i == 0) && i < n) && n <= 2147483647) && 1 <= m) && j <= 2147483646) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.8s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 197 SDslu, 23 SDs, 0 SdLazy, 169 SolverSat, 83 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 59 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 24 NumberOfFragments, 75 HoareAnnotationTreeSize, 2 FomulaSimplifications, 914 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 297 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 252 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 342 ConstructedInterpolants, 0 QuantifiedInterpolants, 26234 SizeOfPredicates, 6 NumberOfNonLiveVariables, 139 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 19 InterpolantComputations, 4 PerfectInterpolantSequences, 544/673 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: OVERALL_TIME[ms]: 299, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 5, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 18, TOOLS_POST_TIME[ms]: 17, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 18, TOOLS_QUANTIFIERELIM_TIME[ms]: 10, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 3, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 33, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME[ms]: 0, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 210, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 17, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 8, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 243, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 243, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 3, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 43, DAG_COMPRESSION_RETAINED_NODES: 23, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...