./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-nestedLoop-1.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_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-nestedLoop-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/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 ac99a20a7aff68d4303ed37ca9ad8305a1f8cf0d .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-03 12:38:26,178 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:38:26,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:38:26,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:38:26,252 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:38:26,253 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:38:26,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:38:26,258 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:38:26,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:38:26,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:38:26,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:38:26,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:38:26,266 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:38:26,267 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:38:26,269 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:38:26,271 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:38:26,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:38:26,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:38:26,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:38:26,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:38:26,281 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:38:26,282 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:38:26,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:38:26,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:38:26,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:38:26,290 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:38:26,290 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:38:26,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:38:26,292 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:38:26,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:38:26,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:38:26,296 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:38:26,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:38:26,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:38:26,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:38:26,300 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:38:26,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:38:26,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:38:26,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:38:26,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:38:26,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:38:26,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:38:26,332 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:38:26,332 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:38:26,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:38:26,333 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:38:26,333 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:38:26,334 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:38:26,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:38:26,334 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:38:26,334 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:38:26,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:38:26,335 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:38:26,335 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:38:26,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:38:26,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:38:26,336 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:38:26,337 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:38:26,337 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:38:26,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:38:26,338 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:38:26,338 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:38:26,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:38:26,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:38:26,339 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:38:26,339 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:38:26,339 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:38:26,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:38:26,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:38:26,340 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:38:26,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:38:26,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:38:26,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:38:26,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:38:26,341 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:38:26,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:38:26,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:38:26,342 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:38:26,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:38:26,342 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_b306bbc8-8473-4ef9-9779-16791dde81d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac99a20a7aff68d4303ed37ca9ad8305a1f8cf0d [2020-12-03 12:38:26,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:38:26,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:38:26,628 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:38:26,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:38:26,630 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:38:26,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/../../sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-nestedLoop-1.c [2020-12-03 12:38:26,731 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/data/a98d575f5/fcc2ee1117524abb98054b63f0988b6c/FLAG773ea00bf [2020-12-03 12:38:27,192 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:38:27,193 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/sv-benchmarks/c/termination-crafted-lit/AliasDarteFeautrierGonnord-SAS2010-nestedLoop-1.c [2020-12-03 12:38:27,200 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/data/a98d575f5/fcc2ee1117524abb98054b63f0988b6c/FLAG773ea00bf [2020-12-03 12:38:27,584 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/data/a98d575f5/fcc2ee1117524abb98054b63f0988b6c [2020-12-03 12:38:27,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:38:27,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:38:27,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:27,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:38:27,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:38:27,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@413fa5e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27, skipping insertion in model container [2020-12-03 12:38:27,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:38:27,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:38:27,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:27,792 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:38:27,814 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:38:27,826 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:38:27,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27 WrapperNode [2020-12-03 12:38:27,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:38:27,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:27,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:38:27,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:38:27,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,845 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,880 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:38:27,882 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:38:27,882 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:38:27,882 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:38:27,891 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,922 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... [2020-12-03 12:38:27,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:38:27,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:38:27,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:38:27,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:38:27,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:38:28,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:38:28,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:38:28,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:38:28,311 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-03 12:38:28,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:28 BoogieIcfgContainer [2020-12-03 12:38:28,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:38:28,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:38:28,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:38:28,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:38:28,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:38:27" (1/3) ... [2020-12-03 12:38:28,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1997f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:28, skipping insertion in model container [2020-12-03 12:38:28,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:38:27" (2/3) ... [2020-12-03 12:38:28,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1997f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:38:28, skipping insertion in model container [2020-12-03 12:38:28,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:28" (3/3) ... [2020-12-03 12:38:28,324 INFO L111 eAbstractionObserver]: Analyzing ICFG AliasDarteFeautrierGonnord-SAS2010-nestedLoop-1.c [2020-12-03 12:38:28,339 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:38:28,342 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-03 12:38:28,354 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-03 12:38:28,374 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:38:28,375 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:38:28,375 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:38:28,375 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:38:28,375 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:38:28,375 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:38:28,375 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:38:28,375 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:38:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-03 12:38:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:38:28,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:28,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:38:28,395 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:28,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:28,401 INFO L82 PathProgramCache]: Analyzing trace with hash 29686488, now seen corresponding path program 1 times [2020-12-03 12:38:28,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:28,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237767321] [2020-12-03 12:38:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:28,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237767321] [2020-12-03 12:38:28,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:28,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:28,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514280293] [2020-12-03 12:38:28,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:28,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:28,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:28,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:28,576 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-03 12:38:28,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:28,669 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2020-12-03 12:38:28,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:28,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:38:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:28,680 INFO L225 Difference]: With dead ends: 66 [2020-12-03 12:38:28,681 INFO L226 Difference]: Without dead ends: 40 [2020-12-03 12:38:28,684 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 [2020-12-03 12:38:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-12-03 12:38:28,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2020-12-03 12:38:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-12-03 12:38:28,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-12-03 12:38:28,747 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2020-12-03 12:38:28,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:28,757 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-12-03 12:38:28,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:28,757 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-12-03 12:38:28,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:38:28,758 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:28,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:38:28,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:38:28,761 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 29685034, now seen corresponding path program 1 times [2020-12-03 12:38:28,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:28,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25261947] [2020-12-03 12:38:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:28,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25261947] [2020-12-03 12:38:28,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:28,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382685725] [2020-12-03 12:38:28,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:28,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:28,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:28,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:28,803 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2020-12-03 12:38:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:28,836 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-12-03 12:38:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:28,836 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-03 12:38:28,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:28,843 INFO L225 Difference]: With dead ends: 34 [2020-12-03 12:38:28,843 INFO L226 Difference]: Without dead ends: 33 [2020-12-03 12:38:28,844 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 [2020-12-03 12:38:28,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-03 12:38:28,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 27. [2020-12-03 12:38:28,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-03 12:38:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-12-03 12:38:28,851 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 5 [2020-12-03 12:38:28,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:28,851 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-12-03 12:38:28,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-12-03 12:38:28,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:38:28,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:28,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:38:28,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:38:28,853 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:28,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash 920281212, now seen corresponding path program 1 times [2020-12-03 12:38:28,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:28,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016338925] [2020-12-03 12:38:28,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:28,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:28,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016338925] [2020-12-03 12:38:28,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:28,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:28,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713458757] [2020-12-03 12:38:28,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:28,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:28,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:28,919 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2020-12-03 12:38:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:28,986 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-12-03 12:38:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:28,987 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:38:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:28,988 INFO L225 Difference]: With dead ends: 45 [2020-12-03 12:38:28,989 INFO L226 Difference]: Without dead ends: 44 [2020-12-03 12:38:28,989 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 [2020-12-03 12:38:28,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-03 12:38:28,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-03 12:38:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-03 12:38:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-12-03 12:38:28,998 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 6 [2020-12-03 12:38:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:28,998 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-12-03 12:38:28,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-12-03 12:38:28,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:38:28,999 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:29,000 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:38:29,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:38:29,000 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:29,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash 920236110, now seen corresponding path program 1 times [2020-12-03 12:38:29,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:29,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156090202] [2020-12-03 12:38:29,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156090202] [2020-12-03 12:38:29,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:29,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:29,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640672031] [2020-12-03 12:38:29,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:29,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:29,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:29,036 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 3 states. [2020-12-03 12:38:29,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:29,064 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2020-12-03 12:38:29,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:29,065 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:38:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:29,066 INFO L225 Difference]: With dead ends: 31 [2020-12-03 12:38:29,067 INFO L226 Difference]: Without dead ends: 30 [2020-12-03 12:38:29,067 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 [2020-12-03 12:38:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-03 12:38:29,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-03 12:38:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-03 12:38:29,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-12-03 12:38:29,084 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 6 [2020-12-03 12:38:29,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:29,085 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-12-03 12:38:29,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:29,085 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-12-03 12:38:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-03 12:38:29,086 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:29,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:29,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:38:29,087 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:29,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1537451600, now seen corresponding path program 1 times [2020-12-03 12:38:29,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:29,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310245490] [2020-12-03 12:38:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:29,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310245490] [2020-12-03 12:38:29,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:29,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-03 12:38:29,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531247856] [2020-12-03 12:38:29,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:29,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:29,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:29,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:29,146 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 3 states. [2020-12-03 12:38:29,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:29,176 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-03 12:38:29,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:29,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-03 12:38:29,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:29,178 INFO L225 Difference]: With dead ends: 30 [2020-12-03 12:38:29,178 INFO L226 Difference]: Without dead ends: 29 [2020-12-03 12:38:29,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-03 12:38:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-03 12:38:29,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-03 12:38:29,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-03 12:38:29,197 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2020-12-03 12:38:29,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:29,198 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-03 12:38:29,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:29,199 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-03 12:38:29,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-03 12:38:29,199 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:29,199 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:29,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:38:29,201 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:29,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:29,202 INFO L82 PathProgramCache]: Analyzing trace with hash -416359280, now seen corresponding path program 1 times [2020-12-03 12:38:29,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:29,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631252155] [2020-12-03 12:38:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:29,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631252155] [2020-12-03 12:38:29,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:29,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:38:29,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779699519] [2020-12-03 12:38:29,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:38:29,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:29,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:38:29,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:38:29,258 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 3 states. [2020-12-03 12:38:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:29,272 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2020-12-03 12:38:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:38:29,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-03 12:38:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:29,274 INFO L225 Difference]: With dead ends: 29 [2020-12-03 12:38:29,274 INFO L226 Difference]: Without dead ends: 28 [2020-12-03 12:38:29,275 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 [2020-12-03 12:38:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-03 12:38:29,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-12-03 12:38:29,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-03 12:38:29,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-12-03 12:38:29,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 8 [2020-12-03 12:38:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:29,282 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-12-03 12:38:29,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:38:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-12-03 12:38:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-03 12:38:29,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:29,283 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2020-12-03 12:38:29,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:38:29,284 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:29,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1321380767, now seen corresponding path program 1 times [2020-12-03 12:38:29,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:29,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019993808] [2020-12-03 12:38:29,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:29,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019993808] [2020-12-03 12:38:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804081987] [2020-12-03 12:38:29,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/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 [2020-12-03 12:38:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:29,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:38:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:29,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920586655] [2020-12-03 12:38:29,579 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-12-03 12:38:29,579 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:29,584 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:29,590 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:29,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:29,901 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:38:30,182 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-12-03 12:38:30,385 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:30,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:30,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-03 12:38:30,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296216891] [2020-12-03 12:38:30,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:38:30,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:30,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:38:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:38:30,389 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 6 states. [2020-12-03 12:38:30,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:30,481 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-12-03 12:38:30,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:38:30,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-12-03 12:38:30,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:30,493 INFO L225 Difference]: With dead ends: 81 [2020-12-03 12:38:30,493 INFO L226 Difference]: Without dead ends: 80 [2020-12-03 12:38:30,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:38:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-03 12:38:30,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 40. [2020-12-03 12:38:30,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-03 12:38:30,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-12-03 12:38:30,525 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 9 [2020-12-03 12:38:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:30,525 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-12-03 12:38:30,525 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:38:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-12-03 12:38:30,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:38:30,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:30,526 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:30,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-03 12:38:30,754 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash -689307342, now seen corresponding path program 1 times [2020-12-03 12:38:30,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:30,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668829765] [2020-12-03 12:38:30,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:30,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668829765] [2020-12-03 12:38:30,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:30,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:38:30,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952173795] [2020-12-03 12:38:30,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:30,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:30,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:30,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:30,786 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand 4 states. [2020-12-03 12:38:30,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:30,871 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2020-12-03 12:38:30,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-03 12:38:30,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-12-03 12:38:30,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:30,872 INFO L225 Difference]: With dead ends: 72 [2020-12-03 12:38:30,872 INFO L226 Difference]: Without dead ends: 70 [2020-12-03 12:38:30,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:38:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-03 12:38:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-12-03 12:38:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 12:38:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-12-03 12:38:30,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 10 [2020-12-03 12:38:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:30,880 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-12-03 12:38:30,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:30,880 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-12-03 12:38:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:38:30,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:30,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:30,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-03 12:38:30,882 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:30,882 INFO L82 PathProgramCache]: Analyzing trace with hash 106308951, now seen corresponding path program 1 times [2020-12-03 12:38:30,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:30,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485929435] [2020-12-03 12:38:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:30,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485929435] [2020-12-03 12:38:30,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:30,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:38:30,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69477012] [2020-12-03 12:38:30,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:30,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:30,912 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 4 states. [2020-12-03 12:38:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:30,960 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2020-12-03 12:38:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:38:30,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-03 12:38:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:30,962 INFO L225 Difference]: With dead ends: 54 [2020-12-03 12:38:30,962 INFO L226 Difference]: Without dead ends: 52 [2020-12-03 12:38:30,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:38:30,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-03 12:38:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-12-03 12:38:30,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-03 12:38:30,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-12-03 12:38:30,969 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 11 [2020-12-03 12:38:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:30,969 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-12-03 12:38:30,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-12-03 12:38:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-03 12:38:30,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:30,970 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:30,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-03 12:38:30,971 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:30,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:30,971 INFO L82 PathProgramCache]: Analyzing trace with hash -999444228, now seen corresponding path program 1 times [2020-12-03 12:38:30,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:30,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107731576] [2020-12-03 12:38:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:30,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:31,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107731576] [2020-12-03 12:38:31,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609355314] [2020-12-03 12:38:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/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 [2020-12-03 12:38:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:31,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-03 12:38:31,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:31,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:31,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:31,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [419727167] [2020-12-03 12:38:31,117 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-03 12:38:31,117 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:31,118 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:31,118 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:31,119 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:31,350 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:38:31,622 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-03 12:38:31,772 WARN L197 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-03 12:38:31,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:31,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:31,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2020-12-03 12:38:31,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207242322] [2020-12-03 12:38:31,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:38:31,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:31,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:38:31,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:38:31,936 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 6 states. [2020-12-03 12:38:31,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:31,986 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2020-12-03 12:38:31,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:38:31,987 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-03 12:38:31,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:31,988 INFO L225 Difference]: With dead ends: 118 [2020-12-03 12:38:31,988 INFO L226 Difference]: Without dead ends: 117 [2020-12-03 12:38:31,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:38:31,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-03 12:38:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2020-12-03 12:38:32,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-03 12:38:32,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-12-03 12:38:32,002 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 12 [2020-12-03 12:38:32,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:32,003 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-12-03 12:38:32,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:38:32,003 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-12-03 12:38:32,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-03 12:38:32,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:32,004 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:32,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-03 12:38:32,218 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:32,218 INFO L82 PathProgramCache]: Analyzing trace with hash -930171701, now seen corresponding path program 1 times [2020-12-03 12:38:32,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:32,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140563750] [2020-12-03 12:38:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:38:32,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140563750] [2020-12-03 12:38:32,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:38:32,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:38:32,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137212278] [2020-12-03 12:38:32,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:32,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:32,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:32,243 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 4 states. [2020-12-03 12:38:32,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:32,276 INFO L93 Difference]: Finished difference Result 94 states and 119 transitions. [2020-12-03 12:38:32,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:38:32,277 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-03 12:38:32,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:32,278 INFO L225 Difference]: With dead ends: 94 [2020-12-03 12:38:32,278 INFO L226 Difference]: Without dead ends: 93 [2020-12-03 12:38:32,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:38:32,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-03 12:38:32,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-12-03 12:38:32,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-03 12:38:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 111 transitions. [2020-12-03 12:38:32,297 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 111 transitions. Word has length 14 [2020-12-03 12:38:32,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:32,297 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 111 transitions. [2020-12-03 12:38:32,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 111 transitions. [2020-12-03 12:38:32,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:38:32,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:32,299 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:32,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-12-03 12:38:32,300 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash -541857789, now seen corresponding path program 1 times [2020-12-03 12:38:32,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:32,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922975039] [2020-12-03 12:38:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:32,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922975039] [2020-12-03 12:38:32,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44929793] [2020-12-03 12:38:32,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/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 [2020-12-03 12:38:32,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:38:32,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:32,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:32,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542752369] [2020-12-03 12:38:32,459 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-03 12:38:32,459 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:32,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:32,460 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:32,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:32,720 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) [2020-12-03 12:38:32,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:32,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2020-12-03 12:38:32,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129228413] [2020-12-03 12:38:32,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:38:32,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:32,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:38:32,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:38:32,735 INFO L87 Difference]: Start difference. First operand 89 states and 111 transitions. Second operand 6 states. [2020-12-03 12:38:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:32,802 INFO L93 Difference]: Finished difference Result 142 states and 174 transitions. [2020-12-03 12:38:32,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:38:32,802 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-03 12:38:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:32,803 INFO L225 Difference]: With dead ends: 142 [2020-12-03 12:38:32,803 INFO L226 Difference]: Without dead ends: 99 [2020-12-03 12:38:32,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:38:32,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-03 12:38:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2020-12-03 12:38:32,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-03 12:38:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 114 transitions. [2020-12-03 12:38:32,827 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 114 transitions. Word has length 16 [2020-12-03 12:38:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:32,828 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 114 transitions. [2020-12-03 12:38:32,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:38:32,828 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 114 transitions. [2020-12-03 12:38:32,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:38:32,833 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:32,833 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:33,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-03 12:38:33,058 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:33,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:33,059 INFO L82 PathProgramCache]: Analyzing trace with hash -735760783, now seen corresponding path program 2 times [2020-12-03 12:38:33,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:33,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774337845] [2020-12-03 12:38:33,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:38:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774337845] [2020-12-03 12:38:33,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312213378] [2020-12-03 12:38:33,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-03 12:38:33,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:38:33,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:38:33,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:38:33,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:38:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:33,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:38:33,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487680620] [2020-12-03 12:38:33,180 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-12-03 12:38:33,180 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:33,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:33,180 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:33,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:33,382 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) [2020-12-03 12:38:33,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:33,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2020-12-03 12:38:33,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881958963] [2020-12-03 12:38:33,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:33,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:33,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:33,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:38:33,388 INFO L87 Difference]: Start difference. First operand 94 states and 114 transitions. Second operand 4 states. [2020-12-03 12:38:33,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:33,421 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-12-03 12:38:33,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:38:33,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-12-03 12:38:33,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:33,422 INFO L225 Difference]: With dead ends: 95 [2020-12-03 12:38:33,422 INFO L226 Difference]: Without dead ends: 77 [2020-12-03 12:38:33,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:38:33,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-03 12:38:33,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-03 12:38:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-03 12:38:33,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 94 transitions. [2020-12-03 12:38:33,429 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 94 transitions. Word has length 16 [2020-12-03 12:38:33,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:33,430 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 94 transitions. [2020-12-03 12:38:33,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:33,430 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 94 transitions. [2020-12-03 12:38:33,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-03 12:38:33,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:33,430 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:33,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:33,658 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:33,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash 471236851, now seen corresponding path program 1 times [2020-12-03 12:38:33,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:33,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793310675] [2020-12-03 12:38:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:33,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793310675] [2020-12-03 12:38:33,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458325197] [2020-12-03 12:38:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-12-03 12:38:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:33,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:38:33,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:33,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:33,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1714301369] [2020-12-03 12:38:33,852 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-03 12:38:33,852 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:33,853 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:33,853 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:33,853 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:34,076 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) [2020-12-03 12:38:34,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:34,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-03 12:38:34,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545040699] [2020-12-03 12:38:34,079 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:38:34,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:38:34,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:38:34,080 INFO L87 Difference]: Start difference. First operand 77 states and 94 transitions. Second operand 10 states. [2020-12-03 12:38:34,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:34,435 INFO L93 Difference]: Finished difference Result 442 states and 524 transitions. [2020-12-03 12:38:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-03 12:38:34,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-12-03 12:38:34,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:34,441 INFO L225 Difference]: With dead ends: 442 [2020-12-03 12:38:34,441 INFO L226 Difference]: Without dead ends: 441 [2020-12-03 12:38:34,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2020-12-03 12:38:34,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-12-03 12:38:34,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 200. [2020-12-03 12:38:34,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-12-03 12:38:34,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2020-12-03 12:38:34,462 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 17 [2020-12-03 12:38:34,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:34,462 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2020-12-03 12:38:34,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:38:34,462 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2020-12-03 12:38:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-12-03 12:38:34,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:34,467 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:38:34,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-03 12:38:34,682 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:34,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash 467352042, now seen corresponding path program 2 times [2020-12-03 12:38:34,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:34,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270010871] [2020-12-03 12:38:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:38:34,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270010871] [2020-12-03 12:38:34,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881330307] [2020-12-03 12:38:34,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:34,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-03 12:38:34,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:38:34,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:38:34,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-03 12:38:34,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-12-03 12:38:34,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1458211678] [2020-12-03 12:38:34,962 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-12-03 12:38:34,962 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:34,963 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:34,963 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:34,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:35,172 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) [2020-12-03 12:38:35,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:35,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2020-12-03 12:38:35,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081836092] [2020-12-03 12:38:35,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-03 12:38:35,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:35,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-03 12:38:35,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:38:35,176 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand 13 states. [2020-12-03 12:38:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:35,853 INFO L93 Difference]: Finished difference Result 699 states and 853 transitions. [2020-12-03 12:38:35,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-03 12:38:35,854 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-12-03 12:38:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:35,859 INFO L225 Difference]: With dead ends: 699 [2020-12-03 12:38:35,859 INFO L226 Difference]: Without dead ends: 698 [2020-12-03 12:38:35,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=883, Unknown=0, NotChecked=0, Total=1332 [2020-12-03 12:38:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2020-12-03 12:38:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 244. [2020-12-03 12:38:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-12-03 12:38:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 300 transitions. [2020-12-03 12:38:35,886 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 300 transitions. Word has length 32 [2020-12-03 12:38:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:35,887 INFO L481 AbstractCegarLoop]: Abstraction has 244 states and 300 transitions. [2020-12-03 12:38:35,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-03 12:38:35,887 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 300 transitions. [2020-12-03 12:38:35,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 12:38:35,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:35,888 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1] [2020-12-03 12:38:36,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:36,102 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:36,103 INFO L82 PathProgramCache]: Analyzing trace with hash -538753878, now seen corresponding path program 2 times [2020-12-03 12:38:36,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:36,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013095416] [2020-12-03 12:38:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:36,131 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-03 12:38:36,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013095416] [2020-12-03 12:38:36,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739316586] [2020-12-03 12:38:36,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:36,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2020-12-03 12:38:36,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:38:36,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:38:36,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:36,197 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-03 12:38:36,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-12-03 12:38:36,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415091950] [2020-12-03 12:38:36,232 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-03 12:38:36,233 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:36,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:36,233 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:36,233 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:36,389 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-03 12:38:36,675 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-12-03 12:38:36,859 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2020-12-03 12:38:37,145 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-03 12:38:37,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:37,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2020-12-03 12:38:37,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416000799] [2020-12-03 12:38:37,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:38:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:37,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:38:37,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-12-03 12:38:37,147 INFO L87 Difference]: Start difference. First operand 244 states and 300 transitions. Second operand 4 states. [2020-12-03 12:38:37,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:37,190 INFO L93 Difference]: Finished difference Result 244 states and 300 transitions. [2020-12-03 12:38:37,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:38:37,191 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-12-03 12:38:37,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:37,193 INFO L225 Difference]: With dead ends: 244 [2020-12-03 12:38:37,193 INFO L226 Difference]: Without dead ends: 243 [2020-12-03 12:38:37,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-12-03 12:38:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-12-03 12:38:37,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 76. [2020-12-03 12:38:37,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 12:38:37,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2020-12-03 12:38:37,205 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 33 [2020-12-03 12:38:37,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:37,205 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2020-12-03 12:38:37,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:38:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2020-12-03 12:38:37,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-03 12:38:37,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:37,206 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:38:37,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:37,422 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:37,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:37,423 INFO L82 PathProgramCache]: Analyzing trace with hash -738627734, now seen corresponding path program 1 times [2020-12-03 12:38:37,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:37,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084050291] [2020-12-03 12:38:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:37,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-03 12:38:37,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084050291] [2020-12-03 12:38:37,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17480728] [2020-12-03 12:38:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:38:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-03 12:38:37,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-12-03 12:38:37,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:38:37,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 14 [2020-12-03 12:38:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138826921] [2020-12-03 12:38:37,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:38:37,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:38:37,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:38:37,756 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand 8 states. [2020-12-03 12:38:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:37,909 INFO L93 Difference]: Finished difference Result 193 states and 226 transitions. [2020-12-03 12:38:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:38:37,910 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 44 [2020-12-03 12:38:37,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:37,911 INFO L225 Difference]: With dead ends: 193 [2020-12-03 12:38:37,911 INFO L226 Difference]: Without dead ends: 132 [2020-12-03 12:38:37,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:38:37,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-03 12:38:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 87. [2020-12-03 12:38:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-03 12:38:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2020-12-03 12:38:37,927 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 44 [2020-12-03 12:38:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:37,927 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2020-12-03 12:38:37,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:38:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2020-12-03 12:38:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-03 12:38:37,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:38:37,929 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1] [2020-12-03 12:38:38,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:38,142 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:38:38,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:38:38,143 INFO L82 PathProgramCache]: Analyzing trace with hash -37887510, now seen corresponding path program 2 times [2020-12-03 12:38:38,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:38:38,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410729899] [2020-12-03 12:38:38,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:38:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:38:38,249 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:38:38,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410729899] [2020-12-03 12:38:38,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746177350] [2020-12-03 12:38:38,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:38,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-03 12:38:38,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:38:38,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:38:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:38:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-03 12:38:38,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:38:38,464 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-03 12:38:38,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [744809924] [2020-12-03 12:38:38,471 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-12-03 12:38:38,471 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:38:38,471 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-03 12:38:38,471 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-03 12:38:38,472 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-03 12:38:38,852 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) [2020-12-03 12:38:38,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:38:38,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 3, 3] total 13 [2020-12-03 12:38:38,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692967458] [2020-12-03 12:38:38,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 12:38:38,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:38:38,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 12:38:38,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:38:38,856 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand 14 states. [2020-12-03 12:38:39,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:38:39,379 INFO L93 Difference]: Finished difference Result 187 states and 207 transitions. [2020-12-03 12:38:39,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-03 12:38:39,379 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 44 [2020-12-03 12:38:39,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:38:39,380 INFO L225 Difference]: With dead ends: 187 [2020-12-03 12:38:39,380 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:38:39,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2020-12-03 12:38:39,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:38:39,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:38:39,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:38:39,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:38:39,382 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 44 [2020-12-03 12:38:39,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:38:39,382 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:38:39,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 12:38:39,383 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:38:39,383 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:38:39,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:38:39,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:38:39,967 WARN L197 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 120 [2020-12-03 12:38:40,660 WARN L197 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 235 [2020-12-03 12:38:41,089 WARN L197 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 27 [2020-12-03 12:38:41,774 WARN L197 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 36 [2020-12-03 12:38:42,636 WARN L197 SmtUtils]: Spent 859.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 35 [2020-12-03 12:38:42,639 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L258 CegarLoopResult]: At program point L23-2(lines 23 34) the Hoare annotation is: (let ((.cse1 (<= ULTIMATE.start_main_~m~0 2147483647)) (.cse5 (<= ULTIMATE.start_main_~m~0 ULTIMATE.start_main_~j~0)) (.cse0 (<= 0 ULTIMATE.start_main_~i~0)) (.cse6 (<= 0 ULTIMATE.start_main_~j~0)) (.cse2 (<= 0 ULTIMATE.start_main_~N~0)) (.cse3 (<= ULTIMATE.start_main_~N~0 2147483647)) (.cse4 (<= ULTIMATE.start_main_~n~0 2147483647))) (or (and .cse0 (<= ULTIMATE.start_main_~i~0 0) .cse1 .cse2 .cse3 .cse4) (and .cse5 (<= ULTIMATE.start_main_~N~0 ULTIMATE.start_main_~i~0) .cse6 .cse1 .cse2 (<= ULTIMATE.start_main_~N~0 (+ ULTIMATE.start_main_~k~0 1)) .cse3 .cse4) (and .cse5 .cse0 .cse6 .cse2 .cse3 (<= ULTIMATE.start_main_~j~0 0) .cse4))) [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 33) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 29) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point L28-2(lines 28 30) no Hoare annotation was computed. [2020-12-03 12:38:42,640 INFO L258 CegarLoopResult]: At program point L28-4(lines 28 30) the Hoare annotation is: (let ((.cse2 (<= ULTIMATE.start_main_~n~0 2147483647))) (let ((.cse0 (let ((.cse3 (<= 0 ULTIMATE.start_main_~i~0)) (.cse4 (<= 0 ULTIMATE.start_main_~j~0)) (.cse5 (<= 0 ULTIMATE.start_main_~N~0)) (.cse6 (<= ULTIMATE.start_main_~N~0 2147483647)) (.cse7 (<= 0 ULTIMATE.start_main_~k~0))) (or (and .cse3 .cse4 .cse5 (< ULTIMATE.start_main_~k~0 2147483647) .cse6 .cse2 .cse7) (and .cse3 .cse4 (<= ULTIMATE.start_main_~i~0 2147483646) (<= ULTIMATE.start_main_~k~0 2147483646) .cse5 .cse6 .cse7)))) (.cse1 (<= ULTIMATE.start_main_~m~0 2147483647))) (or (and .cse0 (<= ULTIMATE.start_main_~i~0 0) .cse1 .cse2) (and .cse0 .cse1 (<= ULTIMATE.start_main_~N~0 (+ ULTIMATE.start_main_~k~0 1)) .cse2 (<= ULTIMATE.start_main_~N~0 (+ ULTIMATE.start_main_~i~0 1)))))) [2020-12-03 12:38:42,640 INFO L262 CegarLoopResult]: For program point L28-5(lines 28 30) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point L33(line 33) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 29) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L258 CegarLoopResult]: At program point L25-2(lines 25 32) the Hoare annotation is: (let ((.cse0 (<= 0 ULTIMATE.start_main_~i~0)) (.cse7 (<= ULTIMATE.start_main_~N~0 2147483647)) (.cse1 (<= 0 ULTIMATE.start_main_~j~0)) (.cse2 (<= ULTIMATE.start_main_~i~0 2147483646)) (.cse3 (<= ULTIMATE.start_main_~m~0 2147483647)) (.cse4 (<= ULTIMATE.start_main_~N~0 (+ ULTIMATE.start_main_~k~0 1))) (.cse5 (<= 0 ULTIMATE.start_main_~N~0)) (.cse6 (<= ULTIMATE.start_main_~n~0 2147483647)) (.cse8 (<= ULTIMATE.start_main_~j~0 0))) (or (and .cse0 .cse1 .cse2 .cse3 (<= ULTIMATE.start_main_~k~0 2147483646) .cse4 .cse5 .cse6 (<= ULTIMATE.start_main_~N~0 (+ ULTIMATE.start_main_~i~0 1)) (<= 0 ULTIMATE.start_main_~k~0)) (and .cse0 .cse1 (<= ULTIMATE.start_main_~i~0 0) .cse3 .cse5 .cse7 .cse8 .cse6) (and .cse0 .cse1 .cse2 (<= ULTIMATE.start_main_~m~0 0) .cse5 .cse7 .cse6 .cse8) (and (<= ULTIMATE.start_main_~N~0 ULTIMATE.start_main_~i~0) .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse8))) [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point L25-3(lines 25 32) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L262 CegarLoopResult]: For program point L21(lines 21 35) no Hoare annotation was computed. [2020-12-03 12:38:42,641 INFO L265 CegarLoopResult]: At program point L21-1(lines 21 35) the Hoare annotation is: true [2020-12-03 12:38:42,642 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-12-03 12:38:42,642 INFO L262 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-12-03 12:38:42,642 INFO L262 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-12-03 12:38:42,642 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 33) no Hoare annotation was computed. [2020-12-03 12:38:42,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:38:42 BoogieIcfgContainer [2020-12-03 12:38:42,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:38:42,664 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:38:42,664 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:38:42,665 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:38:42,665 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:38:28" (3/4) ... [2020-12-03 12:38:42,668 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:38:42,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-03 12:38:42,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-12-03 12:38:42,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:38:42,732 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b306bbc8-8473-4ef9-9779-16791dde81d8/bin/utaipan/witness.graphml [2020-12-03 12:38:42,733 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:38:42,740 INFO L168 Benchmark]: Toolchain (without parser) took 15152.34 ms. Allocated memory was 83.9 MB in the beginning and 167.8 MB in the end (delta: 83.9 MB). Free memory was 51.4 MB in the beginning and 143.9 MB in the end (delta: -92.5 MB). Peak memory consumption was 92.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:42,741 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 42.4 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:42,741 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.39 ms. Allocated memory is still 83.9 MB. Free memory was 51.2 MB in the beginning and 61.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:42,742 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.10 ms. Allocated memory is still 83.9 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:42,742 INFO L168 Benchmark]: Boogie Preprocessor took 43.45 ms. Allocated memory is still 83.9 MB. Free memory was 59.4 MB in the beginning and 58.6 MB in the end (delta: 785.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:42,743 INFO L168 Benchmark]: RCFGBuilder took 388.01 ms. Allocated memory is still 83.9 MB. Free memory was 58.6 MB in the beginning and 45.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:42,743 INFO L168 Benchmark]: TraceAbstraction took 14348.21 ms. Allocated memory was 83.9 MB in the beginning and 167.8 MB in the end (delta: 83.9 MB). Free memory was 45.1 MB in the beginning and 47.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 89.8 MB. Max. memory is 16.1 GB. [2020-12-03 12:38:42,744 INFO L168 Benchmark]: Witness Printer took 68.71 ms. Allocated memory is still 167.8 MB. Free memory was 47.6 MB in the beginning and 45.5 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:38:42,746 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 83.9 MB. Free memory was 42.4 MB in the beginning and 42.4 MB in the end (delta: 41.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 238.39 ms. Allocated memory is still 83.9 MB. Free memory was 51.2 MB in the beginning and 61.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.10 ms. Allocated memory is still 83.9 MB. Free memory was 61.0 MB in the beginning and 59.4 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 43.45 ms. Allocated memory is still 83.9 MB. Free memory was 59.4 MB in the beginning and 58.6 MB in the end (delta: 785.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 388.01 ms. Allocated memory is still 83.9 MB. Free memory was 58.6 MB in the beginning and 45.4 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14348.21 ms. Allocated memory was 83.9 MB in the beginning and 167.8 MB in the end (delta: 83.9 MB). Free memory was 45.1 MB in the beginning and 47.6 MB in the end (delta: -2.5 MB). Peak memory consumption was 89.8 MB. Max. memory is 16.1 GB. * Witness Printer took 68.71 ms. Allocated memory is still 167.8 MB. Free memory was 47.6 MB in the beginning and 45.5 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 33]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 33]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 29]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 29]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((0 <= i && i <= 0) && m <= 2147483647) && 0 <= N) && N <= 2147483647) && n <= 2147483647) || (((((((m <= j && N <= i) && 0 <= j) && m <= 2147483647) && 0 <= N) && N <= k + 1) && N <= 2147483647) && n <= 2147483647)) || ((((((m <= j && 0 <= i) && 0 <= j) && 0 <= N) && N <= 2147483647) && j <= 0) && n <= 2147483647) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((((((((0 <= i && 0 <= j) && i <= 2147483646) && m <= 2147483647) && k <= 2147483646) && N <= k + 1) && 0 <= N) && n <= 2147483647) && N <= i + 1) && 0 <= k) || (((((((0 <= i && 0 <= j) && i <= 0) && m <= 2147483647) && 0 <= N) && N <= 2147483647) && j <= 0) && n <= 2147483647)) || (((((((0 <= i && 0 <= j) && i <= 2147483646) && m <= 0) && 0 <= N) && N <= 2147483647) && n <= 2147483647) && j <= 0)) || (((((((N <= i && 0 <= j) && i <= 2147483646) && m <= 2147483647) && N <= k + 1) && 0 <= N) && n <= 2147483647) && j <= 0) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: ((((((((((0 <= i && 0 <= j) && 0 <= N) && k < 2147483647) && N <= 2147483647) && n <= 2147483647) && 0 <= k) || ((((((0 <= i && 0 <= j) && i <= 2147483646) && k <= 2147483646) && 0 <= N) && N <= 2147483647) && 0 <= k)) && i <= 0) && m <= 2147483647) && n <= 2147483647) || (((((((((((0 <= i && 0 <= j) && 0 <= N) && k < 2147483647) && N <= 2147483647) && n <= 2147483647) && 0 <= k) || ((((((0 <= i && 0 <= j) && i <= 2147483646) && k <= 2147483646) && 0 <= N) && N <= 2147483647) && 0 <= k)) && m <= 2147483647) && N <= k + 1) && n <= 2147483647) && N <= i + 1) - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.2s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 275 SDtfs, 1114 SDslu, 434 SDs, 0 SdLazy, 649 SolverSat, 300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 621 GetRequests, 448 SyntacticMatches, 14 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=244occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 1042 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 66 NumberOfFragments, 301 HoareAnnotationTreeSize, 4 FomulaSimplifications, 329874 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 76526 FormulaSimplificationTreeSizeReductionInter, 1.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 518 NumberOfCodeBlocks, 436 NumberOfCodeBlocksAsserted, 30 NumberOfCheckSat, 705 ConstructedInterpolants, 0 QuantifiedInterpolants, 54959 SizeOfPredicates, 19 NumberOfNonLiveVariables, 488 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 36 InterpolantComputations, 11 PerfectInterpolantSequences, 413/716 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...