./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.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_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 12:35:52,533 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-03 12:35:52,536 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-03 12:35:52,608 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-03 12:35:52,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-03 12:35:52,614 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-03 12:35:52,617 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-03 12:35:52,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-03 12:35:52,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-03 12:35:52,633 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-03 12:35:52,634 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-03 12:35:52,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-03 12:35:52,637 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-03 12:35:52,641 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-03 12:35:52,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-03 12:35:52,645 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-03 12:35:52,646 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-03 12:35:52,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-03 12:35:52,658 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-03 12:35:52,661 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-03 12:35:52,666 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-03 12:35:52,667 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-03 12:35:52,670 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-03 12:35:52,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-03 12:35:52,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-03 12:35:52,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-03 12:35:52,683 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-03 12:35:52,684 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-03 12:35:52,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-03 12:35:52,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-03 12:35:52,689 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-03 12:35:52,691 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-03 12:35:52,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-03 12:35:52,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-03 12:35:52,698 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-03 12:35:52,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-03 12:35:52,699 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-03 12:35:52,699 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-03 12:35:52,700 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-03 12:35:52,701 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-03 12:35:52,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-03 12:35:52,704 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-03 12:35:52,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-03 12:35:52,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-03 12:35:52,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-03 12:35:52,748 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-03 12:35:52,748 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-03 12:35:52,748 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-03 12:35:52,748 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-03 12:35:52,748 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-03 12:35:52,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-03 12:35:52,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-03 12:35:52,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-03 12:35:52,750 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-03 12:35:52,751 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-03 12:35:52,751 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-03 12:35:52,751 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-03 12:35:52,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-03 12:35:52,752 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-03 12:35:52,753 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-03 12:35:52,753 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-03 12:35:52,753 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-03 12:35:52,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-03 12:35:52,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-03 12:35:52,754 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-03 12:35:52,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-03 12:35:52,754 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-03 12:35:52,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-03 12:35:52,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-03 12:35:52,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-03 12:35:52,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:52,757 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-03 12:35:52,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-03 12:35:52,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-03 12:35:52,758 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-03 12:35:52,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-03 12:35:52,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-03 12:35:52,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-03 12:35:52,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-03 12:35:52,759 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_99ff3c1f-e3f9-49e7-a376-57547f87396b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2020-12-03 12:35:53,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-03 12:35:53,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-03 12:35:53,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-03 12:35:53,054 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-03 12:35:53,055 INFO L275 PluginConnector]: CDTParser initialized [2020-12-03 12:35:53,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-12-03 12:35:53,134 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/data/ce3f10a28/602d19c7fd77449b9efae8fcc69e7ec8/FLAG31d613817 [2020-12-03 12:35:53,555 INFO L306 CDTParser]: Found 1 translation units. [2020-12-03 12:35:53,555 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-12-03 12:35:53,562 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/data/ce3f10a28/602d19c7fd77449b9efae8fcc69e7ec8/FLAG31d613817 [2020-12-03 12:35:53,959 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/data/ce3f10a28/602d19c7fd77449b9efae8fcc69e7ec8 [2020-12-03 12:35:53,961 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-03 12:35:53,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-03 12:35:53,967 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:53,967 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-03 12:35:53,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-03 12:35:53,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:53" (1/1) ... [2020-12-03 12:35:53,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e87b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:53, skipping insertion in model container [2020-12-03 12:35:53,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.12 12:35:53" (1/1) ... [2020-12-03 12:35:53,987 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-03 12:35:54,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-03 12:35:54,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:54,160 INFO L203 MainTranslator]: Completed pre-run [2020-12-03 12:35:54,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-03 12:35:54,200 INFO L208 MainTranslator]: Completed translation [2020-12-03 12:35:54,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54 WrapperNode [2020-12-03 12:35:54,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-03 12:35:54,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:54,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-03 12:35:54,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-03 12:35:54,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-03 12:35:54,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-03 12:35:54,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-03 12:35:54,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-03 12:35:54,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,267 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... [2020-12-03 12:35:54,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-03 12:35:54,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-03 12:35:54,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-03 12:35:54,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-03 12:35:54,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-03 12:35:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-12-03 12:35:54,365 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-12-03 12:35:54,365 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-12-03 12:35:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-12-03 12:35:54,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-03 12:35:54,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-03 12:35:54,769 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-03 12:35:54,770 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-03 12:35:54,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:54 BoogieIcfgContainer [2020-12-03 12:35:54,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-03 12:35:54,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-03 12:35:54,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-03 12:35:54,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-03 12:35:54,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.12 12:35:53" (1/3) ... [2020-12-03 12:35:54,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16985fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:54, skipping insertion in model container [2020-12-03 12:35:54,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.12 12:35:54" (2/3) ... [2020-12-03 12:35:54,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16985fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.12 12:35:54, skipping insertion in model container [2020-12-03 12:35:54,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:54" (3/3) ... [2020-12-03 12:35:54,795 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b.c [2020-12-03 12:35:54,810 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-03 12:35:54,813 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-03 12:35:54,824 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-03 12:35:54,849 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-03 12:35:54,850 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-03 12:35:54,850 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-03 12:35:54,850 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-03 12:35:54,850 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-03 12:35:54,850 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-03 12:35:54,850 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-03 12:35:54,850 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-03 12:35:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-03 12:35:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-03 12:35:54,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:54,873 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-03 12:35:54,874 INFO L429 AbstractCegarLoop]: === Iteration 1 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:54,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:54,880 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2020-12-03 12:35:54,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:54,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141997081] [2020-12-03 12:35:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,030 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 12:35:55,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141997081] [2020-12-03 12:35:55,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:55,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503278315] [2020-12-03 12:35:55,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-03 12:35:55,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-03 12:35:55,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-03 12:35:55,053 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-12-03 12:35:55,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,144 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-03 12:35:55,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:55,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-03 12:35:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,155 INFO L225 Difference]: With dead ends: 60 [2020-12-03 12:35:55,155 INFO L226 Difference]: Without dead ends: 55 [2020-12-03 12:35:55,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:55,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-03 12:35:55,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-12-03 12:35:55,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-03 12:35:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-12-03 12:35:55,207 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 5 [2020-12-03 12:35:55,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,207 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-12-03 12:35:55,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-03 12:35:55,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-12-03 12:35:55,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-03 12:35:55,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,208 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,209 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-03 12:35:55,209 INFO L429 AbstractCegarLoop]: === Iteration 2 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:55,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2121179530, now seen corresponding path program 1 times [2020-12-03 12:35:55,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704475817] [2020-12-03 12:35:55,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,230 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 12:35:55,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704475817] [2020-12-03 12:35:55,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:55,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358798205] [2020-12-03 12:35:55,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,234 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 3 states. [2020-12-03 12:35:55,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,251 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-03 12:35:55,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,251 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-03 12:35:55,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,253 INFO L225 Difference]: With dead ends: 52 [2020-12-03 12:35:55,253 INFO L226 Difference]: Without dead ends: 51 [2020-12-03 12:35:55,254 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 12:35:55,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-03 12:35:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-12-03 12:35:55,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-03 12:35:55,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-03 12:35:55,266 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-12-03 12:35:55,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,266 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-03 12:35:55,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:55,267 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-03 12:35:55,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-03 12:35:55,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,267 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-03 12:35:55,268 INFO L429 AbstractCegarLoop]: === Iteration 3 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:55,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2074588191, now seen corresponding path program 1 times [2020-12-03 12:35:55,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31140311] [2020-12-03 12:35:55,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,366 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 12:35:55,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31140311] [2020-12-03 12:35:55,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:55,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822056456] [2020-12-03 12:35:55,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-03 12:35:55,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-03 12:35:55,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:55,378 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 7 states. [2020-12-03 12:35:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,607 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-03 12:35:55,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-03 12:35:55,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-03 12:35:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,614 INFO L225 Difference]: With dead ends: 77 [2020-12-03 12:35:55,615 INFO L226 Difference]: Without dead ends: 76 [2020-12-03 12:35:55,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-03 12:35:55,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-12-03 12:35:55,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-03 12:35:55,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-12-03 12:35:55,638 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2020-12-03 12:35:55,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,639 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-12-03 12:35:55,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-03 12:35:55,639 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-12-03 12:35:55,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-03 12:35:55,640 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-03 12:35:55,642 INFO L429 AbstractCegarLoop]: === Iteration 4 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:55,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,643 INFO L82 PathProgramCache]: Analyzing trace with hash 112275557, now seen corresponding path program 1 times [2020-12-03 12:35:55,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162651343] [2020-12-03 12:35:55,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,688 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 12:35:55,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162651343] [2020-12-03 12:35:55,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:55,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172009400] [2020-12-03 12:35:55,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,695 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 3 states. [2020-12-03 12:35:55,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,717 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-12-03 12:35:55,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-03 12:35:55,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,723 INFO L225 Difference]: With dead ends: 69 [2020-12-03 12:35:55,723 INFO L226 Difference]: Without dead ends: 68 [2020-12-03 12:35:55,725 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 12:35:55,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-03 12:35:55,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-03 12:35:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-03 12:35:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-12-03 12:35:55,750 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 11 [2020-12-03 12:35:55,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,750 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-12-03 12:35:55,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:55,751 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-12-03 12:35:55,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-03 12:35:55,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,752 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-03 12:35:55,753 INFO L429 AbstractCegarLoop]: === Iteration 5 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:55,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2048531074, now seen corresponding path program 1 times [2020-12-03 12:35:55,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742294284] [2020-12-03 12:35:55,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-03 12:35:55,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742294284] [2020-12-03 12:35:55,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:55,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090120833] [2020-12-03 12:35:55,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:55,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:55,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:55,852 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 6 states. [2020-12-03 12:35:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,897 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-12-03 12:35:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:55,898 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-03 12:35:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,899 INFO L225 Difference]: With dead ends: 125 [2020-12-03 12:35:55,899 INFO L226 Difference]: Without dead ends: 86 [2020-12-03 12:35:55,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:55,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-03 12:35:55,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-12-03 12:35:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-03 12:35:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-12-03 12:35:55,914 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 16 [2020-12-03 12:35:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,915 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-12-03 12:35:55,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-12-03 12:35:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-03 12:35:55,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:55,916 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:55,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-03 12:35:55,917 INFO L429 AbstractCegarLoop]: === Iteration 6 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:55,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash -57180086, now seen corresponding path program 1 times [2020-12-03 12:35:55,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:55,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995831911] [2020-12-03 12:35:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:55,950 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 12:35:55,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995831911] [2020-12-03 12:35:55,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:55,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:55,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766504570] [2020-12-03 12:35:55,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:55,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:55,955 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 3 states. [2020-12-03 12:35:55,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:55,974 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-12-03 12:35:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:55,976 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-03 12:35:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:55,979 INFO L225 Difference]: With dead ends: 76 [2020-12-03 12:35:55,980 INFO L226 Difference]: Without dead ends: 75 [2020-12-03 12:35:55,980 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 12:35:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-03 12:35:55,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-03 12:35:55,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-03 12:35:55,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-12-03 12:35:55,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 18 [2020-12-03 12:35:55,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:55,998 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-12-03 12:35:55,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:56,000 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-12-03 12:35:56,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 12:35:56,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,002 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-03 12:35:56,003 INFO L429 AbstractCegarLoop]: === Iteration 7 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,004 INFO L82 PathProgramCache]: Analyzing trace with hash -599425808, now seen corresponding path program 1 times [2020-12-03 12:35:56,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602204633] [2020-12-03 12:35:56,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,063 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 12:35:56,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602204633] [2020-12-03 12:35:56,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:56,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540297011] [2020-12-03 12:35:56,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:56,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:56,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:56,067 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 3 states. [2020-12-03 12:35:56,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,091 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-12-03 12:35:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:56,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-03 12:35:56,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,093 INFO L225 Difference]: With dead ends: 75 [2020-12-03 12:35:56,093 INFO L226 Difference]: Without dead ends: 74 [2020-12-03 12:35:56,096 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 12:35:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-03 12:35:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-03 12:35:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-03 12:35:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-12-03 12:35:56,106 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 19 [2020-12-03 12:35:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,107 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-12-03 12:35:56,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:56,107 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-12-03 12:35:56,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-03 12:35:56,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,108 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-03 12:35:56,108 INFO L429 AbstractCegarLoop]: === Iteration 8 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1772582622, now seen corresponding path program 1 times [2020-12-03 12:35:56,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304543570] [2020-12-03 12:35:56,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,162 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 12:35:56,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304543570] [2020-12-03 12:35:56,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:56,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057630638] [2020-12-03 12:35:56,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:56,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,165 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 4 states. [2020-12-03 12:35:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,185 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-12-03 12:35:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:56,186 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-03 12:35:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,187 INFO L225 Difference]: With dead ends: 95 [2020-12-03 12:35:56,187 INFO L226 Difference]: Without dead ends: 94 [2020-12-03 12:35:56,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-03 12:35:56,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-12-03 12:35:56,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-03 12:35:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-12-03 12:35:56,198 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 19 [2020-12-03 12:35:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,199 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-12-03 12:35:56,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-12-03 12:35:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-03 12:35:56,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,200 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,200 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-03 12:35:56,201 INFO L429 AbstractCegarLoop]: === Iteration 9 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1402330794, now seen corresponding path program 1 times [2020-12-03 12:35:56,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513671008] [2020-12-03 12:35:56,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,232 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 12:35:56,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513671008] [2020-12-03 12:35:56,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:56,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382602506] [2020-12-03 12:35:56,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:56,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,234 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 4 states. [2020-12-03 12:35:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,253 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-12-03 12:35:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:56,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-03 12:35:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,256 INFO L225 Difference]: With dead ends: 89 [2020-12-03 12:35:56,256 INFO L226 Difference]: Without dead ends: 83 [2020-12-03 12:35:56,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-03 12:35:56,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-03 12:35:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-03 12:35:56,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-03 12:35:56,278 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 20 [2020-12-03 12:35:56,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,278 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-03 12:35:56,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-03 12:35:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-03 12:35:56,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-03 12:35:56,287 INFO L429 AbstractCegarLoop]: === Iteration 10 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,287 INFO L82 PathProgramCache]: Analyzing trace with hash 921726737, now seen corresponding path program 1 times [2020-12-03 12:35:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487682119] [2020-12-03 12:35:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-03 12:35:56,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487682119] [2020-12-03 12:35:56,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:56,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739114963] [2020-12-03 12:35:56,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:56,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:56,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:56,348 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 6 states. [2020-12-03 12:35:56,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,430 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2020-12-03 12:35:56,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:56,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-03 12:35:56,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,432 INFO L225 Difference]: With dead ends: 167 [2020-12-03 12:35:56,432 INFO L226 Difference]: Without dead ends: 101 [2020-12-03 12:35:56,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-12-03 12:35:56,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-03 12:35:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-03 12:35:56,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-03 12:35:56,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-03 12:35:56,460 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 23 [2020-12-03 12:35:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,461 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-03 12:35:56,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-03 12:35:56,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-03 12:35:56,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,464 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-03 12:35:56,465 INFO L429 AbstractCegarLoop]: === Iteration 11 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,466 INFO L82 PathProgramCache]: Analyzing trace with hash 970950199, now seen corresponding path program 1 times [2020-12-03 12:35:56,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986903325] [2020-12-03 12:35:56,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,541 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-03 12:35:56,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986903325] [2020-12-03 12:35:56,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:56,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121635842] [2020-12-03 12:35:56,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:56,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:56,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:56,545 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-12-03 12:35:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,633 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-12-03 12:35:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:56,634 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-03 12:35:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,636 INFO L225 Difference]: With dead ends: 176 [2020-12-03 12:35:56,636 INFO L226 Difference]: Without dead ends: 105 [2020-12-03 12:35:56,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-03 12:35:56,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-03 12:35:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-12-03 12:35:56,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-03 12:35:56,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-12-03 12:35:56,659 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 34 [2020-12-03 12:35:56,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,659 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-12-03 12:35:56,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:56,660 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-12-03 12:35:56,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-03 12:35:56,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,663 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-03 12:35:56,663 INFO L429 AbstractCegarLoop]: === Iteration 12 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1027694963, now seen corresponding path program 1 times [2020-12-03 12:35:56,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86439956] [2020-12-03 12:35:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-03 12:35:56,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86439956] [2020-12-03 12:35:56,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-03 12:35:56,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998405290] [2020-12-03 12:35:56,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-03 12:35:56,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-03 12:35:56,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,719 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 4 states. [2020-12-03 12:35:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,744 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-12-03 12:35:56,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-03 12:35:56,744 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-03 12:35:56,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,747 INFO L225 Difference]: With dead ends: 104 [2020-12-03 12:35:56,747 INFO L226 Difference]: Without dead ends: 103 [2020-12-03 12:35:56,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-03 12:35:56,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-03 12:35:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-12-03 12:35:56,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-03 12:35:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-12-03 12:35:56,759 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 37 [2020-12-03 12:35:56,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,760 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-12-03 12:35:56,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-03 12:35:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-12-03 12:35:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-03 12:35:56,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,762 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-03 12:35:56,762 INFO L429 AbstractCegarLoop]: === Iteration 13 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,763 INFO L82 PathProgramCache]: Analyzing trace with hash 860890908, now seen corresponding path program 1 times [2020-12-03 12:35:56,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873899099] [2020-12-03 12:35:56,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-03 12:35:56,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873899099] [2020-12-03 12:35:56,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-03 12:35:56,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399352862] [2020-12-03 12:35:56,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-03 12:35:56,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-03 12:35:56,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-03 12:35:56,818 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 3 states. [2020-12-03 12:35:56,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,830 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-12-03 12:35:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-03 12:35:56,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-03 12:35:56,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,837 INFO L225 Difference]: With dead ends: 101 [2020-12-03 12:35:56,837 INFO L226 Difference]: Without dead ends: 100 [2020-12-03 12:35:56,838 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 12:35:56,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-03 12:35:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-03 12:35:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-03 12:35:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-12-03 12:35:56,851 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 33 [2020-12-03 12:35:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:56,852 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-12-03 12:35:56,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-03 12:35:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-12-03 12:35:56,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-03 12:35:56,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:56,859 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:56,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-03 12:35:56,860 INFO L429 AbstractCegarLoop]: === Iteration 14 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1035643475, now seen corresponding path program 1 times [2020-12-03 12:35:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:56,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740983446] [2020-12-03 12:35:56,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-03 12:35:56,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740983446] [2020-12-03 12:35:56,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-03 12:35:56,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-03 12:35:56,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490775670] [2020-12-03 12:35:56,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-03 12:35:56,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-03 12:35:56,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-03 12:35:56,938 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 6 states. [2020-12-03 12:35:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:56,987 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-12-03 12:35:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-03 12:35:56,988 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-12-03 12:35:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:56,994 INFO L225 Difference]: With dead ends: 110 [2020-12-03 12:35:56,994 INFO L226 Difference]: Without dead ends: 109 [2020-12-03 12:35:56,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-03 12:35:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-03 12:35:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-12-03 12:35:57,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-03 12:35:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-12-03 12:35:57,007 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 48 [2020-12-03 12:35:57,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,007 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-12-03 12:35:57,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-03 12:35:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-12-03 12:35:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-03 12:35:57,009 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,009 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:57,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-03 12:35:57,009 INFO L429 AbstractCegarLoop]: === Iteration 15 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:57,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:57,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1488967228, now seen corresponding path program 1 times [2020-12-03 12:35:57,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:57,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412070836] [2020-12-03 12:35:57,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:57,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-03 12:35:57,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412070836] [2020-12-03 12:35:57,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960996736] [2020-12-03 12:35:57,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/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 12:35:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:57,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-03 12:35:57,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-03 12:35:57,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-03 12:35:57,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:35:57,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 17 [2020-12-03 12:35:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793949942] [2020-12-03 12:35:57,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-03 12:35:57,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-03 12:35:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-03 12:35:57,666 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 12 states. [2020-12-03 12:35:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:57,827 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-12-03 12:35:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:35:57,828 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-03 12:35:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:57,829 INFO L225 Difference]: With dead ends: 100 [2020-12-03 12:35:57,830 INFO L226 Difference]: Without dead ends: 99 [2020-12-03 12:35:57,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-12-03 12:35:57,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-03 12:35:57,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-03 12:35:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-03 12:35:57,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-12-03 12:35:57,844 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 40 [2020-12-03 12:35:57,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:57,844 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-12-03 12:35:57,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-03 12:35:57,844 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-12-03 12:35:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-03 12:35:57,846 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:57,846 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:58,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-03 12:35:58,061 INFO L429 AbstractCegarLoop]: === Iteration 16 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:58,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1798417111, now seen corresponding path program 1 times [2020-12-03 12:35:58,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:58,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222620168] [2020-12-03 12:35:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-03 12:35:58,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222620168] [2020-12-03 12:35:58,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595495689] [2020-12-03 12:35:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/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 12:35:58,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-03 12:35:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-03 12:35:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-03 12:35:58,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [196536928] [2020-12-03 12:35:58,586 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2020-12-03 12:35:58,587 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:35:58,593 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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 12:35:58,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:35:58,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-03 12:35:58,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209168683] [2020-12-03 12:35:58,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-03 12:35:58,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:58,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-03 12:35:58,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-03 12:35:58,599 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 14 states. [2020-12-03 12:35:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:58,919 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2020-12-03 12:35:58,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-03 12:35:58,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-03 12:35:58,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:58,921 INFO L225 Difference]: With dead ends: 217 [2020-12-03 12:35:58,922 INFO L226 Difference]: Without dead ends: 135 [2020-12-03 12:35:58,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-12-03 12:35:58,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-03 12:35:58,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2020-12-03 12:35:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-03 12:35:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-12-03 12:35:58,939 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 47 [2020-12-03 12:35:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:58,940 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-12-03 12:35:58,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-03 12:35:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-12-03 12:35:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-03 12:35:58,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:58,942 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:59,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-03 12:35:59,157 INFO L429 AbstractCegarLoop]: === Iteration 17 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:59,158 INFO L82 PathProgramCache]: Analyzing trace with hash 695736933, now seen corresponding path program 1 times [2020-12-03 12:35:59,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:59,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608632061] [2020-12-03 12:35:59,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-03 12:35:59,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608632061] [2020-12-03 12:35:59,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261893247] [2020-12-03 12:35:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/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 12:35:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:59,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-03 12:35:59,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:35:59,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-03 12:35:59,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:35:59,555 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-03 12:35:59,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-03 12:35:59,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9] total 15 [2020-12-03 12:35:59,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528200179] [2020-12-03 12:35:59,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-03 12:35:59,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:35:59,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-03 12:35:59,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-03 12:35:59,561 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 8 states. [2020-12-03 12:35:59,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:35:59,639 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2020-12-03 12:35:59,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-03 12:35:59,647 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-12-03 12:35:59,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:35:59,648 INFO L225 Difference]: With dead ends: 111 [2020-12-03 12:35:59,649 INFO L226 Difference]: Without dead ends: 110 [2020-12-03 12:35:59,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-03 12:35:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-03 12:35:59,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-03 12:35:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-03 12:35:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-12-03 12:35:59,658 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2020-12-03 12:35:59,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:35:59,658 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-12-03 12:35:59,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-03 12:35:59,659 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-12-03 12:35:59,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-03 12:35:59,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:35:59,660 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-03 12:35:59,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-03 12:35:59,873 INFO L429 AbstractCegarLoop]: === Iteration 18 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:35:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:35:59,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1252678887, now seen corresponding path program 1 times [2020-12-03 12:35:59,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:35:59,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894996431] [2020-12-03 12:35:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:35:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:35:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-03 12:35:59,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894996431] [2020-12-03 12:35:59,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974225793] [2020-12-03 12:35:59,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-03 12:36:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-03 12:36:00,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-03 12:36:00,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681018329] [2020-12-03 12:36:00,273 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-12-03 12:36:00,273 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:00,274 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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 12:36:00,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:00,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-03 12:36:00,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338729968] [2020-12-03 12:36:00,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-03 12:36:00,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:00,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-03 12:36:00,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:00,279 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 10 states. [2020-12-03 12:36:00,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:00,320 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-12-03 12:36:00,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-03 12:36:00,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-03 12:36:00,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:00,322 INFO L225 Difference]: With dead ends: 135 [2020-12-03 12:36:00,322 INFO L226 Difference]: Without dead ends: 125 [2020-12-03 12:36:00,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-03 12:36:00,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-03 12:36:00,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-03 12:36:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-03 12:36:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-12-03 12:36:00,332 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 60 [2020-12-03 12:36:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:00,333 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-12-03 12:36:00,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-03 12:36:00,333 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-12-03 12:36:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-03 12:36:00,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-03 12:36:00,342 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 19, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1] [2020-12-03 12:36:00,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-03 12:36:00,565 INFO L429 AbstractCegarLoop]: === Iteration 19 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-03 12:36:00,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-03 12:36:00,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1980651882, now seen corresponding path program 2 times [2020-12-03 12:36:00,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-03 12:36:00,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635656480] [2020-12-03 12:36:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-03 12:36:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-03 12:36:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 62 proven. 271 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-12-03 12:36:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635656480] [2020-12-03 12:36:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592606519] [2020-12-03 12:36:00,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:00,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-03 12:36:00,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-03 12:36:00,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-03 12:36:00,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-03 12:36:01,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-12-03 12:36:01,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-03 12:36:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-12-03 12:36:02,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [214182350] [2020-12-03 12:36:02,780 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-12-03 12:36:02,781 INFO L166 IcfgInterpreter]: Building call graph [2020-12-03 12:36:02,781 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) 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 12:36:02,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-03 12:36:02,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2020-12-03 12:36:02,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105092689] [2020-12-03 12:36:02,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-03 12:36:02,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-03 12:36:02,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-03 12:36:02,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2020-12-03 12:36:02,786 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 30 states. [2020-12-03 12:36:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-03 12:36:03,218 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-12-03 12:36:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-03 12:36:03,219 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 250 [2020-12-03 12:36:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-03 12:36:03,220 INFO L225 Difference]: With dead ends: 189 [2020-12-03 12:36:03,220 INFO L226 Difference]: Without dead ends: 0 [2020-12-03 12:36:03,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2020-12-03 12:36:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-03 12:36:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-03 12:36:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-03 12:36:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-03 12:36:03,222 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 250 [2020-12-03 12:36:03,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-03 12:36:03,223 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-03 12:36:03,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-03 12:36:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-03 12:36:03,223 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-03 12:36:03,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-03 12:36:03,446 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-03 12:36:03,989 INFO L262 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,989 INFO L262 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-12-03 12:36:03,989 INFO L262 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,990 INFO L262 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-12-03 12:36:03,990 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,990 INFO L265 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-12-03 12:36:03,990 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,990 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-12-03 12:36:03,990 INFO L258 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (<= 1 rec1_~i) (<= rec1_~i |rec1_#in~i|))) [2020-12-03 12:36:03,990 INFO L262 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L258 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (<= 1 rec1_~i) (<= |rec1_#t~ret0| 1) (<= rec1_~i |rec1_#in~i|))) [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,991 INFO L262 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L258 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (<= 1 rec1_~i) (<= |rec1_#t~ret0| 1) (<= |rec1_#t~ret1| 0) (<= rec1_~i |rec1_#in~i|))) [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,992 INFO L262 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-12-03 12:36:03,993 INFO L262 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-12-03 12:36:03,993 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,993 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,993 INFO L262 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-12-03 12:36:03,993 INFO L258 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= rec2_~j 2147483647) (<= 1 rec2_~j))) (not (<= |rec2_#in~j| 0)) (or (not (<= |rec2_#in~j| 1)) (<= rec2_~j 1))) [2020-12-03 12:36:03,993 INFO L262 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,994 INFO L258 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= |rec2_#t~ret3| 1) (<= rec2_~j 2147483647) (<= 1 rec2_~j))) (or (not (<= |rec2_#in~j| 1)) (<= |rec2_#t~ret3| 0)) (not (<= |rec2_#in~j| 0))) [2020-12-03 12:36:03,994 INFO L262 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,994 INFO L262 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,994 INFO L262 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,994 INFO L265 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-12-03 12:36:03,994 INFO L262 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,994 INFO L262 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,995 INFO L262 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-03 12:36:03,995 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-03 12:36:03,995 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-03 12:36:03,995 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-12-03 12:36:03,995 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-03 12:36:04,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.12 12:36:04 BoogieIcfgContainer [2020-12-03 12:36:04,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-03 12:36:04,001 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-03 12:36:04,001 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-03 12:36:04,001 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-03 12:36:04,002 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.12 12:35:54" (3/4) ... [2020-12-03 12:36:04,005 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-03 12:36:04,011 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-12-03 12:36:04,011 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-12-03 12:36:04,016 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-03 12:36:04,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-03 12:36:04,017 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-03 12:36:04,052 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_99ff3c1f-e3f9-49e7-a376-57547f87396b/bin/utaipan/witness.graphml [2020-12-03 12:36:04,053 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-03 12:36:04,054 INFO L168 Benchmark]: Toolchain (without parser) took 10090.80 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 72.6 MB in the beginning and 146.0 MB in the end (delta: -73.4 MB). Peak memory consumption was 42.9 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,055 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:04,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.46 ms. Allocated memory is still 102.8 MB. Free memory was 72.3 MB in the beginning and 82.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,055 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.22 ms. Allocated memory is still 102.8 MB. Free memory was 82.0 MB in the beginning and 80.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:04,056 INFO L168 Benchmark]: Boogie Preprocessor took 27.93 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-03 12:36:04,056 INFO L168 Benchmark]: RCFGBuilder took 488.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 66.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,057 INFO L168 Benchmark]: TraceAbstraction took 9217.41 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 66.1 MB in the beginning and 149.2 MB in the end (delta: -83.1 MB). Peak memory consumption was 92.1 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,057 INFO L168 Benchmark]: Witness Printer took 51.84 ms. Allocated memory is still 218.1 MB. Free memory was 149.2 MB in the beginning and 146.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-03 12:36:04,059 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 83.9 MB. Free memory was 43.8 MB in the beginning and 43.7 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.46 ms. Allocated memory is still 102.8 MB. Free memory was 72.3 MB in the beginning and 82.0 MB in the end (delta: -9.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.22 ms. Allocated memory is still 102.8 MB. Free memory was 82.0 MB in the beginning and 80.8 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.93 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 488.56 ms. Allocated memory is still 102.8 MB. Free memory was 79.7 MB in the beginning and 66.6 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9217.41 ms. Allocated memory was 102.8 MB in the beginning and 218.1 MB in the end (delta: 115.3 MB). Free memory was 66.1 MB in the beginning and 149.2 MB in the end (delta: -83.1 MB). Peak memory consumption was 92.1 MB. Max. memory is 16.1 GB. * Witness Printer took 51.84 ms. Allocated memory is still 218.1 MB. Free memory was 149.2 MB in the beginning and 146.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 42 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.5s, OverallIterations: 19, TraceHistogramMax: 25, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 719 SDtfs, 287 SDslu, 2021 SDs, 0 SdLazy, 960 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 997 GetRequests, 850 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=18, 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, 19 MinimizatonAttempts, 103 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 237 PreInvPairs, 253 NumberOfFragments, 103 HoareAnnotationTreeSize, 237 FomulaSimplifications, 873 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 668 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 1183 NumberOfCodeBlocks, 1033 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1596 ConstructedInterpolants, 0 QuantifiedInterpolants, 300466 SizeOfPredicates, 3 NumberOfNonLiveVariables, 605 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 29 InterpolantComputations, 18 PerfectInterpolantSequences, 5039/5435 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...