./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 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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 0.2.0-7b2dab5 [2020-12-09 07:31:46,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:31:46,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:31:46,252 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:31:46,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:31:46,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:31:46,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:31:46,268 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:31:46,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:31:46,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:31:46,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:31:46,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:31:46,274 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:31:46,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:31:46,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:31:46,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:31:46,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:31:46,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:31:46,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:31:46,284 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:31:46,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:31:46,287 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:31:46,299 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:31:46,300 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:31:46,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:31:46,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:31:46,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:31:46,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:31:46,304 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:31:46,305 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:31:46,305 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:31:46,306 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:31:46,306 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:31:46,307 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:31:46,308 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:31:46,308 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:31:46,308 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:31:46,308 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:31:46,309 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:31:46,309 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:31:46,310 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:31:46,310 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 07:31:46,334 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:31:46,334 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:31:46,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:31:46,335 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:31:46,335 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:31:46,335 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:31:46,335 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:31:46,335 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:31:46,336 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:31:46,336 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:31:46,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:31:46,337 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:31:46,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:31:46,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:31:46,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:31:46,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:31:46,339 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_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 500cb8735f650eb0e7c33062ddc23c2166b17f19 [2020-12-09 07:31:46,498 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:31:46,514 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:31:46,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:31:46,517 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:31:46,517 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:31:46,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-12-09 07:31:46,566 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/data/65de803db/54dcc8c0fded4968bddb6b574f52d9f3/FLAG4894cb6f3 [2020-12-09 07:31:46,920 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:31:46,920 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-12-09 07:31:46,925 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/data/65de803db/54dcc8c0fded4968bddb6b574f52d9f3/FLAG4894cb6f3 [2020-12-09 07:31:46,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/data/65de803db/54dcc8c0fded4968bddb6b574f52d9f3 [2020-12-09 07:31:46,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:31:46,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:31:46,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:31:46,940 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:31:46,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:31:46,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:46" (1/1) ... [2020-12-09 07:31:46,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26692050 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:46, skipping insertion in model container [2020-12-09 07:31:46,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:46" (1/1) ... [2020-12-09 07:31:46,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:31:46,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:31:47,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:31:47,057 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:31:47,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:31:47,075 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:31:47,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47 WrapperNode [2020-12-09 07:31:47,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:31:47,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:31:47,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:31:47,077 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:31:47,082 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,098 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:31:47,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:31:47,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:31:47,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:31:47,105 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... [2020-12-09 07:31:47,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:31:47,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:31:47,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:31:47,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:31:47,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:31:47,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:31:47,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:31:47,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:31:47,312 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2020-12-09 07:31:47,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:47 BoogieIcfgContainer [2020-12-09 07:31:47,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:31:47,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:31:47,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:31:47,318 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:31:47,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:31:46" (1/3) ... [2020-12-09 07:31:47,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dfd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:47, skipping insertion in model container [2020-12-09 07:31:47,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:47" (2/3) ... [2020-12-09 07:31:47,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70dfd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:47, skipping insertion in model container [2020-12-09 07:31:47,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:47" (3/3) ... [2020-12-09 07:31:47,321 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-speedpldi3.c [2020-12-09 07:31:47,331 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:31:47,333 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2020-12-09 07:31:47,341 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-12-09 07:31:47,359 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:31:47,359 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:31:47,359 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:31:47,359 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:31:47,359 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:31:47,360 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:31:47,360 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:31:47,360 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:31:47,369 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 07:31:47,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:31:47,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:47,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:31:47,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:47,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:47,378 INFO L82 PathProgramCache]: Analyzing trace with hash 29684842, now seen corresponding path program 1 times [2020-12-09 07:31:47,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:47,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495904663] [2020-12-09 07:31:47,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:47,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:47,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495904663] [2020-12-09 07:31:47,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:47,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:31:47,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971024494] [2020-12-09 07:31:47,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:31:47,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:31:47,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:31:47,503 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 3 states. [2020-12-09 07:31:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:47,540 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-12-09 07:31:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:31:47,541 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 07:31:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:47,547 INFO L225 Difference]: With dead ends: 21 [2020-12-09 07:31:47,547 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 07:31:47,549 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 [2020-12-09 07:31:47,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 07:31:47,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-12-09 07:31:47,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:31:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2020-12-09 07:31:47,571 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 5 [2020-12-09 07:31:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:47,571 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2020-12-09 07:31:47,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:31:47,572 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2020-12-09 07:31:47,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:31:47,572 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:47,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:31:47,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:31:47,572 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 29685034, now seen corresponding path program 1 times [2020-12-09 07:31:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:47,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737818547] [2020-12-09 07:31:47,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737818547] [2020-12-09 07:31:47,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:47,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:31:47,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659117052] [2020-12-09 07:31:47,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:31:47,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:47,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:31:47,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:31:47,595 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 3 states. [2020-12-09 07:31:47,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:47,610 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-12-09 07:31:47,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:31:47,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 07:31:47,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:47,611 INFO L225 Difference]: With dead ends: 30 [2020-12-09 07:31:47,611 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 07:31:47,612 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 [2020-12-09 07:31:47,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 07:31:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 07:31:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 07:31:47,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-09 07:31:47,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2020-12-09 07:31:47,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:47,615 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-09 07:31:47,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:31:47,615 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-09 07:31:47,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 07:31:47,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:47,615 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 07:31:47,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:31:47,616 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:47,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:47,616 INFO L82 PathProgramCache]: Analyzing trace with hash 920230152, now seen corresponding path program 1 times [2020-12-09 07:31:47,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:47,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459340275] [2020-12-09 07:31:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:47,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459340275] [2020-12-09 07:31:47,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:47,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:31:47,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672070650] [2020-12-09 07:31:47,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:31:47,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:47,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:31:47,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:31:47,636 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 3 states. [2020-12-09 07:31:47,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:47,647 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2020-12-09 07:31:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:31:47,647 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 07:31:47,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:47,648 INFO L225 Difference]: With dead ends: 17 [2020-12-09 07:31:47,648 INFO L226 Difference]: Without dead ends: 16 [2020-12-09 07:31:47,648 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 [2020-12-09 07:31:47,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-12-09 07:31:47,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-12-09 07:31:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-12-09 07:31:47,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-12-09 07:31:47,651 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 6 [2020-12-09 07:31:47,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:47,651 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-12-09 07:31:47,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:31:47,651 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-12-09 07:31:47,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 07:31:47,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:47,652 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-09 07:31:47,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 07:31:47,652 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:47,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:47,652 INFO L82 PathProgramCache]: Analyzing trace with hash -199749339, now seen corresponding path program 1 times [2020-12-09 07:31:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:47,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044783305] [2020-12-09 07:31:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044783305] [2020-12-09 07:31:47,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112623536] [2020-12-09 07:31:47,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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 [2020-12-09 07:31:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:31:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:47,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:47,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:31:47,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561825752] [2020-12-09 07:31:47,780 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-09 07:31:47,780 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:47,784 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:47,787 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:47,788 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:47,909 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:31:48,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:48,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 9 [2020-12-09 07:31:48,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363362033] [2020-12-09 07:31:48,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:31:48,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:48,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:31:48,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:31:48,010 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 6 states. [2020-12-09 07:31:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:48,052 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-12-09 07:31:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 07:31:48,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-09 07:31:48,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:48,053 INFO L225 Difference]: With dead ends: 26 [2020-12-09 07:31:48,053 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:31:48,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:31:48,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:31:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-09 07:31:48,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 07:31:48,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-12-09 07:31:48,057 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 9 [2020-12-09 07:31:48,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:48,057 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-12-09 07:31:48,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:31:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-12-09 07:31:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 07:31:48,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:48,058 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:48,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:48,259 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash 610055194, now seen corresponding path program 1 times [2020-12-09 07:31:48,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:48,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989594282] [2020-12-09 07:31:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:48,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989594282] [2020-12-09 07:31:48,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090697494] [2020-12-09 07:31:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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 [2020-12-09 07:31:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:48,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:31:48,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:48,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:48,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:48,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [701670810] [2020-12-09 07:31:48,476 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:31:48,476 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:48,477 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:48,477 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:48,477 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:48,642 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 07:31:48,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:48,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2020-12-09 07:31:48,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405764233] [2020-12-09 07:31:48,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:31:48,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:48,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:31:48,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:31:48,644 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 8 states. [2020-12-09 07:31:48,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:48,776 INFO L93 Difference]: Finished difference Result 63 states and 79 transitions. [2020-12-09 07:31:48,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 07:31:48,776 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-12-09 07:31:48,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:48,777 INFO L225 Difference]: With dead ends: 63 [2020-12-09 07:31:48,777 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 07:31:48,778 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 [2020-12-09 07:31:48,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 07:31:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2020-12-09 07:31:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 07:31:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-12-09 07:31:48,784 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2020-12-09 07:31:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:48,784 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-12-09 07:31:48,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:31:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-12-09 07:31:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-09 07:31:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:48,784 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:48,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-09 07:31:48,986 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:48,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1977014293, now seen corresponding path program 1 times [2020-12-09 07:31:48,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:48,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033211400] [2020-12-09 07:31:48,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033211400] [2020-12-09 07:31:49,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529355939] [2020-12-09 07:31:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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 [2020-12-09 07:31:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:49,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 07:31:49,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:49,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 07:31:49,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [150825878] [2020-12-09 07:31:49,182 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:31:49,182 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:49,182 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:49,182 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:49,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:49,339 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 07:31:49,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:49,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-09 07:31:49,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174133401] [2020-12-09 07:31:49,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:31:49,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:49,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:31:49,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:31:49,341 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 6 states. [2020-12-09 07:31:49,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:49,381 INFO L93 Difference]: Finished difference Result 110 states and 146 transitions. [2020-12-09 07:31:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:31:49,382 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-12-09 07:31:49,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:49,384 INFO L225 Difference]: With dead ends: 110 [2020-12-09 07:31:49,384 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 07:31:49,385 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 [2020-12-09 07:31:49,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 07:31:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 96. [2020-12-09 07:31:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-09 07:31:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2020-12-09 07:31:49,399 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 17 [2020-12-09 07:31:49,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:49,399 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2020-12-09 07:31:49,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:31:49,399 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2020-12-09 07:31:49,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 07:31:49,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:49,400 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-09 07:31:49,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-09 07:31:49,601 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1157906947, now seen corresponding path program 1 times [2020-12-09 07:31:49,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:49,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734069399] [2020-12-09 07:31:49,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:49,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 07:31:49,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734069399] [2020-12-09 07:31:49,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:31:49,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 07:31:49,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590843693] [2020-12-09 07:31:49,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:31:49,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:49,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:31:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:31:49,652 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand 4 states. [2020-12-09 07:31:49,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:49,682 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-12-09 07:31:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:31:49,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-12-09 07:31:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:49,684 INFO L225 Difference]: With dead ends: 96 [2020-12-09 07:31:49,684 INFO L226 Difference]: Without dead ends: 95 [2020-12-09 07:31:49,685 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 [2020-12-09 07:31:49,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-09 07:31:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-12-09 07:31:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-09 07:31:49,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 115 transitions. [2020-12-09 07:31:49,715 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 115 transitions. Word has length 18 [2020-12-09 07:31:49,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:49,716 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 115 transitions. [2020-12-09 07:31:49,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:31:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 115 transitions. [2020-12-09 07:31:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-09 07:31:49,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:49,718 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2020-12-09 07:31:49,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-12-09 07:31:49,719 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:49,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:49,719 INFO L82 PathProgramCache]: Analyzing trace with hash 907494726, now seen corresponding path program 2 times [2020-12-09 07:31:49,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:49,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514385796] [2020-12-09 07:31:49,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:49,785 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 42 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:31:49,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514385796] [2020-12-09 07:31:49,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157450976] [2020-12-09 07:31:49,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:49,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 07:31:49,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:31:49,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 07:31:49,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 07:31:49,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-12-09 07:31:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1046996861] [2020-12-09 07:31:49,895 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:31:49,896 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:49,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:49,896 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:49,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:50,007 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 07:31:50,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:50,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 14 [2020-12-09 07:31:50,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942106865] [2020-12-09 07:31:50,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 07:31:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 07:31:50,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-09 07:31:50,008 INFO L87 Difference]: Start difference. First operand 95 states and 115 transitions. Second operand 14 states. [2020-12-09 07:31:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:50,109 INFO L93 Difference]: Finished difference Result 215 states and 260 transitions. [2020-12-09 07:31:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 07:31:50,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-12-09 07:31:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:50,110 INFO L225 Difference]: With dead ends: 215 [2020-12-09 07:31:50,110 INFO L226 Difference]: Without dead ends: 136 [2020-12-09 07:31:50,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-12-09 07:31:50,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-09 07:31:50,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 95. [2020-12-09 07:31:50,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-12-09 07:31:50,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2020-12-09 07:31:50,119 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 29 [2020-12-09 07:31:50,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:50,120 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2020-12-09 07:31:50,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 07:31:50,120 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2020-12-09 07:31:50,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-09 07:31:50,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:31:50,121 INFO L422 BasicCegarLoop]: trace histogram [10, 5, 5, 5, 5, 4, 4, 1, 1, 1] [2020-12-09 07:31:50,321 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:50,323 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 07:31:50,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:31:50,324 INFO L82 PathProgramCache]: Analyzing trace with hash 2128580005, now seen corresponding path program 2 times [2020-12-09 07:31:50,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:31:50,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889644213] [2020-12-09 07:31:50,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:31:50,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:31:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-12-09 07:31:50,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889644213] [2020-12-09 07:31:50,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019549971] [2020-12-09 07:31:50,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/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 [2020-12-09 07:31:50,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-09 07:31:50,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:31:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 07:31:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:31:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-09 07:31:50,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:31:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-12-09 07:31:50,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2118969919] [2020-12-09 07:31:50,596 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-12-09 07:31:50,596 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:31:50,596 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:31:50,596 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:31:50,596 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:31:50,683 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:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) 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) [2020-12-09 07:31:50,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:31:50,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2020-12-09 07:31:50,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257340975] [2020-12-09 07:31:50,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 07:31:50,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:31:50,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 07:31:50,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 07:31:50,684 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand 4 states. [2020-12-09 07:31:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:31:50,698 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-09 07:31:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 07:31:50,699 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-12-09 07:31:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:31:50,699 INFO L225 Difference]: With dead ends: 95 [2020-12-09 07:31:50,699 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 07:31:50,700 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 [2020-12-09 07:31:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 07:31:50,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 07:31:50,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 07:31:50,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 07:31:50,700 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-12-09 07:31:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:31:50,701 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 07:31:50,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 07:31:50,701 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 07:31:50,701 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 07:31:50,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:31:50,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 07:31:51,192 WARN L197 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point L21(lines 21 26) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L258 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))) [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point L17(lines 17 28) no Hoare annotation was computed. [2020-12-09 07:31:51,194 INFO L265 CegarLoopResult]: At program point L17-1(lines 17 28) the Hoare annotation is: true [2020-12-09 07:31:51,194 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 22) no Hoare annotation was computed. [2020-12-09 07:31:51,195 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-12-09 07:31:51,195 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 07:31:51,195 INFO L262 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-12-09 07:31:51,195 INFO L262 CegarLoopResult]: For program point L22-1(line 22) no Hoare annotation was computed. [2020-12-09 07:31:51,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:31:51 BoogieIcfgContainer [2020-12-09 07:31:51,207 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:31:51,207 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:31:51,207 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:31:51,207 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:31:51,208 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:47" (3/4) ... [2020-12-09 07:31:51,210 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 07:31:51,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 07:31:51,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 07:31:51,215 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:31:51,255 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_802113f8-6d3f-4792-a470-0e1b40e7cd6f/bin/utaipan/witness.graphml [2020-12-09 07:31:51,255 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:31:51,256 INFO L168 Benchmark]: Toolchain (without parser) took 4317.88 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 116.7 MB in the beginning and 153.5 MB in the end (delta: -36.8 MB). Peak memory consumption was 91.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,257 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.7 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:31:51,257 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.49 ms. Allocated memory is still 146.8 MB. Free memory was 116.5 MB in the beginning and 107.9 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,258 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.01 ms. Allocated memory is still 146.8 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,258 INFO L168 Benchmark]: Boogie Preprocessor took 12.45 ms. Allocated memory is still 146.8 MB. Free memory was 106.7 MB in the beginning and 105.7 MB in the end (delta: 955.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:31:51,259 INFO L168 Benchmark]: RCFGBuilder took 202.35 ms. Allocated memory is still 146.8 MB. Free memory was 105.7 MB in the beginning and 95.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,259 INFO L168 Benchmark]: TraceAbstraction took 3891.30 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 94.6 MB in the beginning and 59.4 MB in the end (delta: 35.1 MB). Peak memory consumption was 66.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,260 INFO L168 Benchmark]: Witness Printer took 48.35 ms. Allocated memory is still 176.2 MB. Free memory was 59.4 MB in the beginning and 153.5 MB in the end (delta: -94.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:31:51,262 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 83.9 MB. Free memory was 54.8 MB in the beginning and 54.7 MB in the end (delta: 78.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 136.49 ms. Allocated memory is still 146.8 MB. Free memory was 116.5 MB in the beginning and 107.9 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.01 ms. Allocated memory is still 146.8 MB. Free memory was 107.9 MB in the beginning and 106.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.45 ms. Allocated memory is still 146.8 MB. Free memory was 106.7 MB in the beginning and 105.7 MB in the end (delta: 955.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 202.35 ms. Allocated memory is still 146.8 MB. Free memory was 105.7 MB in the beginning and 95.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3891.30 ms. Allocated memory was 146.8 MB in the beginning and 176.2 MB in the end (delta: 29.4 MB). Free memory was 94.6 MB in the beginning and 59.4 MB in the end (delta: 35.1 MB). Peak memory consumption was 66.6 MB. Max. memory is 16.1 GB. * Witness Printer took 48.35 ms. Allocated memory is still 176.2 MB. Free memory was 59.4 MB in the beginning and 153.5 MB in the end (delta: -94.0 MB). Peak memory consumption was 4.2 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: 3.5s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.4s, 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, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 264 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s 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: 0.0s 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]: 129, 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]: 18, 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]: 14, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 6, FLUID_QUERY_TIME[ms]: 2, 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]: 74, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 5, DOMAIN_ISBOTTOM_APPLICATIONS: 5, DOMAIN_ISBOTTOM_TIME[ms]: 4, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 96, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 95, 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]: 1, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 2, DAG_COMPRESSION_TIME[ms]: 5, 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...