./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_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/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 [2020-12-09 19:17:11,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:17:11,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:17:11,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:17:11,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:17:11,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:17:11,077 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:17:11,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:17:11,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:17:11,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:17:11,090 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:17:11,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:17:11,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:17:11,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:17:11,093 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:17:11,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:17:11,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:17:11,095 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:17:11,097 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:17:11,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:17:11,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:17:11,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:17:11,102 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:17:11,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:17:11,105 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:17:11,105 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:17:11,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:17:11,106 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:17:11,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:17:11,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:17:11,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:17:11,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:17:11,108 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:17:11,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:17:11,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:17:11,110 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:17:11,111 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:17:11,111 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:17:11,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:17:11,111 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:17:11,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:17:11,113 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-12-09 19:17:11,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:17:11,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:17:11,129 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:17:11,129 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:17:11,129 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:17:11,129 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:17:11,130 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:17:11,130 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:17:11,131 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:17:11,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:17:11,131 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 19:17:11,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:17:11,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:17:11,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 19:17:11,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:17:11,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:17:11,133 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 19:17:11,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:17:11,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:17:11,134 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_96754714-e777-4a75-a4b2-ff61576f82ea/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2020-12-09 19:17:11,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:17:11,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:17:11,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:17:11,321 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:17:11,322 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:17:11,322 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-12-09 19:17:11,362 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/data/ff8336861/d876b2b5be22411bb3ff7e30ed366f15/FLAG79d2466c5 [2020-12-09 19:17:11,749 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:17:11,749 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-12-09 19:17:11,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/data/ff8336861/d876b2b5be22411bb3ff7e30ed366f15/FLAG79d2466c5 [2020-12-09 19:17:11,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/data/ff8336861/d876b2b5be22411bb3ff7e30ed366f15 [2020-12-09 19:17:11,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:17:11,769 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:17:11,770 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:17:11,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:17:11,773 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:17:11,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8a596e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11, skipping insertion in model container [2020-12-09 19:17:11,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:17:11,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:17:11,888 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:17:11,891 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:17:11,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:17:11,913 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:17:11,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11 WrapperNode [2020-12-09 19:17:11,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:17:11,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:17:11,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:17:11,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:17:11,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,923 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:17:11,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:17:11,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:17:11,938 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:17:11,943 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,943 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... [2020-12-09 19:17:11,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:17:11,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:17:11,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:17:11,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:17:11,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:17:12,013 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-12-09 19:17:12,013 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-12-09 19:17:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-12-09 19:17:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-12-09 19:17:12,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:17:12,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:17:12,161 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:17:12,162 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 19:17:12,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:12 BoogieIcfgContainer [2020-12-09 19:17:12,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:17:12,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:17:12,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:17:12,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:17:12,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:17:11" (1/3) ... [2020-12-09 19:17:12,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488db846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:12, skipping insertion in model container [2020-12-09 19:17:12,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:17:11" (2/3) ... [2020-12-09 19:17:12,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488db846 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:17:12, skipping insertion in model container [2020-12-09 19:17:12,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:12" (3/3) ... [2020-12-09 19:17:12,169 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b.c [2020-12-09 19:17:12,178 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:17:12,181 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-12-09 19:17:12,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-12-09 19:17:12,205 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:17:12,205 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 19:17:12,205 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:17:12,205 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:17:12,205 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:17:12,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:17:12,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:17:12,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:17:12,217 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-12-09 19:17:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:17:12,220 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,220 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:17:12,221 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]=== [2020-12-09 19:17:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,225 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2020-12-09 19:17:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883248447] [2020-12-09 19:17:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:12,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883248447] [2020-12-09 19:17:12,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:12,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198530499] [2020-12-09 19:17:12,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:17:12,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:17:12,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:17:12,354 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-12-09 19:17:12,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,427 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-12-09 19:17:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:17:12,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-12-09 19:17:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,435 INFO L225 Difference]: With dead ends: 60 [2020-12-09 19:17:12,435 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 19:17:12,437 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 [2020-12-09 19:17:12,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 19:17:12,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-12-09 19:17:12,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 19:17:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-12-09 19:17:12,472 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 5 [2020-12-09 19:17:12,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,473 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-12-09 19:17:12,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:17:12,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-12-09 19:17:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:17:12,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:17:12,474 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]=== [2020-12-09 19:17:12,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,475 INFO L82 PathProgramCache]: Analyzing trace with hash -2121179530, now seen corresponding path program 1 times [2020-12-09 19:17:12,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362005829] [2020-12-09 19:17:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:12,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362005829] [2020-12-09 19:17:12,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:12,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601217642] [2020-12-09 19:17:12,491 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:12,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:12,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,492 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 3 states. [2020-12-09 19:17:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,511 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-12-09 19:17:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:12,512 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 19:17:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,514 INFO L225 Difference]: With dead ends: 52 [2020-12-09 19:17:12,514 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 19:17:12,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 19:17:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-12-09 19:17:12,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-09 19:17:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-12-09 19:17:12,529 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-12-09 19:17:12,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,529 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-12-09 19:17:12,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-12-09 19:17:12,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:17:12,530 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,530 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:17:12,531 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]=== [2020-12-09 19:17:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash -2074588191, now seen corresponding path program 1 times [2020-12-09 19:17:12,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030090032] [2020-12-09 19:17:12,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:12,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030090032] [2020-12-09 19:17:12,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:17:12,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871296538] [2020-12-09 19:17:12,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 19:17:12,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 19:17:12,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:17:12,573 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 7 states. [2020-12-09 19:17:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,666 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-12-09 19:17:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 19:17:12,666 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-12-09 19:17:12,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,667 INFO L225 Difference]: With dead ends: 77 [2020-12-09 19:17:12,667 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 19:17:12,668 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 [2020-12-09 19:17:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 19:17:12,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-12-09 19:17:12,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 19:17:12,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-12-09 19:17:12,678 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2020-12-09 19:17:12,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,678 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-12-09 19:17:12,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 19:17:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-12-09 19:17:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 19:17:12,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:17:12,679 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]=== [2020-12-09 19:17:12,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,680 INFO L82 PathProgramCache]: Analyzing trace with hash 112275557, now seen corresponding path program 1 times [2020-12-09 19:17:12,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607369605] [2020-12-09 19:17:12,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:12,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607369605] [2020-12-09 19:17:12,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80436341] [2020-12-09 19:17:12,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:12,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:12,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,696 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 3 states. [2020-12-09 19:17:12,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,706 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-12-09 19:17:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:12,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-09 19:17:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,707 INFO L225 Difference]: With dead ends: 69 [2020-12-09 19:17:12,707 INFO L226 Difference]: Without dead ends: 68 [2020-12-09 19:17:12,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-12-09 19:17:12,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-12-09 19:17:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 19:17:12,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-12-09 19:17:12,717 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 11 [2020-12-09 19:17:12,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,717 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-12-09 19:17:12,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:12,717 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-12-09 19:17:12,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 19:17:12,717 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,718 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 19:17:12,718 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]=== [2020-12-09 19:17:12,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,718 INFO L82 PathProgramCache]: Analyzing trace with hash -2048531074, now seen corresponding path program 1 times [2020-12-09 19:17:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078292947] [2020-12-09 19:17:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:17:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078292947] [2020-12-09 19:17:12,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:17:12,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893833929] [2020-12-09 19:17:12,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:17:12,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:17:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:12,751 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 6 states. [2020-12-09 19:17:12,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,781 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-12-09 19:17:12,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:17:12,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-12-09 19:17:12,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,783 INFO L225 Difference]: With dead ends: 125 [2020-12-09 19:17:12,783 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 19:17:12,785 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 [2020-12-09 19:17:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 19:17:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-12-09 19:17:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 19:17:12,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-12-09 19:17:12,795 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 16 [2020-12-09 19:17:12,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,795 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-12-09 19:17:12,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:17:12,795 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-12-09 19:17:12,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-09 19:17:12,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,796 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 19:17:12,796 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]=== [2020-12-09 19:17:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash -57180086, now seen corresponding path program 1 times [2020-12-09 19:17:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565998551] [2020-12-09 19:17:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:17:12,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565998551] [2020-12-09 19:17:12,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:12,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672181727] [2020-12-09 19:17:12,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,817 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 3 states. [2020-12-09 19:17:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,827 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-12-09 19:17:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:12,828 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-09 19:17:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,829 INFO L225 Difference]: With dead ends: 76 [2020-12-09 19:17:12,830 INFO L226 Difference]: Without dead ends: 75 [2020-12-09 19:17:12,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-09 19:17:12,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-12-09 19:17:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-09 19:17:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-12-09 19:17:12,843 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 18 [2020-12-09 19:17:12,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,844 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-12-09 19:17:12,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:12,844 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-12-09 19:17:12,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 19:17:12,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,845 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 19:17:12,845 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]=== [2020-12-09 19:17:12,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,845 INFO L82 PathProgramCache]: Analyzing trace with hash -599425808, now seen corresponding path program 1 times [2020-12-09 19:17:12,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649192092] [2020-12-09 19:17:12,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:17:12,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649192092] [2020-12-09 19:17:12,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:12,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047335638] [2020-12-09 19:17:12,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:12,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:12,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,873 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 3 states. [2020-12-09 19:17:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,884 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-12-09 19:17:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:12,885 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-09 19:17:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,886 INFO L225 Difference]: With dead ends: 75 [2020-12-09 19:17:12,886 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 19:17:12,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:12,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 19:17:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-12-09 19:17:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-09 19:17:12,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-12-09 19:17:12,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 19 [2020-12-09 19:17:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,898 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-12-09 19:17:12,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-12-09 19:17:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 19:17:12,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,899 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 19:17:12,900 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]=== [2020-12-09 19:17:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1772582622, now seen corresponding path program 1 times [2020-12-09 19:17:12,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086493727] [2020-12-09 19:17:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:17:12,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086493727] [2020-12-09 19:17:12,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:12,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740651691] [2020-12-09 19:17:12,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:17:12,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:17:12,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:17:12,928 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 4 states. [2020-12-09 19:17:12,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:12,946 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-12-09 19:17:12,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:17:12,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-12-09 19:17:12,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:12,948 INFO L225 Difference]: With dead ends: 95 [2020-12-09 19:17:12,948 INFO L226 Difference]: Without dead ends: 94 [2020-12-09 19:17:12,949 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 [2020-12-09 19:17:12,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-09 19:17:12,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-12-09 19:17:12,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-09 19:17:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-12-09 19:17:12,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 19 [2020-12-09 19:17:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:12,960 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-12-09 19:17:12,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:17:12,960 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-12-09 19:17:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 19:17:12,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:12,961 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:17:12,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 19:17:12,962 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]=== [2020-12-09 19:17:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1402330794, now seen corresponding path program 1 times [2020-12-09 19:17:12,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:12,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822706622] [2020-12-09 19:17:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:17:12,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822706622] [2020-12-09 19:17:12,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:12,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:12,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314639518] [2020-12-09 19:17:12,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:17:12,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:12,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:17:12,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:17:12,990 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 4 states. [2020-12-09 19:17:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,002 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-12-09 19:17:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:17:13,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-12-09 19:17:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,003 INFO L225 Difference]: With dead ends: 89 [2020-12-09 19:17:13,003 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 19:17:13,004 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 [2020-12-09 19:17:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 19:17:13,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-12-09 19:17:13,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 19:17:13,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-12-09 19:17:13,013 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 20 [2020-12-09 19:17:13,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,014 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-12-09 19:17:13,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:17:13,014 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-12-09 19:17:13,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 19:17:13,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,015 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] [2020-12-09 19:17:13,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 19:17:13,015 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]=== [2020-12-09 19:17:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 921726737, now seen corresponding path program 1 times [2020-12-09 19:17:13,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506901840] [2020-12-09 19:17:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 19:17:13,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506901840] [2020-12-09 19:17:13,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:13,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:17:13,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796889186] [2020-12-09 19:17:13,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:17:13,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:17:13,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:13,047 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 6 states. [2020-12-09 19:17:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,088 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2020-12-09 19:17:13,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:17:13,089 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-12-09 19:17:13,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,090 INFO L225 Difference]: With dead ends: 167 [2020-12-09 19:17:13,090 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 19:17:13,093 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 [2020-12-09 19:17:13,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 19:17:13,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-12-09 19:17:13,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-09 19:17:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-12-09 19:17:13,103 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 23 [2020-12-09 19:17:13,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,104 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-12-09 19:17:13,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:17:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-12-09 19:17:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-09 19:17:13,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,105 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] [2020-12-09 19:17:13,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-09 19:17:13,106 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]=== [2020-12-09 19:17:13,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,106 INFO L82 PathProgramCache]: Analyzing trace with hash 970950199, now seen corresponding path program 1 times [2020-12-09 19:17:13,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109514659] [2020-12-09 19:17:13,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,145 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 19:17:13,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109514659] [2020-12-09 19:17:13,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:13,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:17:13,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368170232] [2020-12-09 19:17:13,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:17:13,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:17:13,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:13,147 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-12-09 19:17:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,184 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-12-09 19:17:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:17:13,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-12-09 19:17:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,186 INFO L225 Difference]: With dead ends: 176 [2020-12-09 19:17:13,186 INFO L226 Difference]: Without dead ends: 105 [2020-12-09 19:17:13,187 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 [2020-12-09 19:17:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-09 19:17:13,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-12-09 19:17:13,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-09 19:17:13,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-12-09 19:17:13,193 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 34 [2020-12-09 19:17:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,193 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-12-09 19:17:13,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:17:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-12-09 19:17:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-09 19:17:13,194 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,194 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] [2020-12-09 19:17:13,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-09 19:17:13,195 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]=== [2020-12-09 19:17:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1027694963, now seen corresponding path program 1 times [2020-12-09 19:17:13,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692350481] [2020-12-09 19:17:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,225 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-09 19:17:13,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692350481] [2020-12-09 19:17:13,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:13,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:17:13,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944053627] [2020-12-09 19:17:13,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:17:13,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:17:13,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:17:13,227 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 4 states. [2020-12-09 19:17:13,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,245 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-12-09 19:17:13,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:17:13,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-12-09 19:17:13,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,248 INFO L225 Difference]: With dead ends: 104 [2020-12-09 19:17:13,248 INFO L226 Difference]: Without dead ends: 103 [2020-12-09 19:17:13,248 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 [2020-12-09 19:17:13,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-09 19:17:13,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-12-09 19:17:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-12-09 19:17:13,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-12-09 19:17:13,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 37 [2020-12-09 19:17:13,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,258 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-12-09 19:17:13,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:17:13,258 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-12-09 19:17:13,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 19:17:13,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,259 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] [2020-12-09 19:17:13,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-09 19:17:13,259 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]=== [2020-12-09 19:17:13,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,260 INFO L82 PathProgramCache]: Analyzing trace with hash 860890908, now seen corresponding path program 1 times [2020-12-09 19:17:13,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241574412] [2020-12-09 19:17:13,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 19:17:13,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241574412] [2020-12-09 19:17:13,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:13,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:17:13,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202511891] [2020-12-09 19:17:13,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 19:17:13,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 19:17:13,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:13,281 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 3 states. [2020-12-09 19:17:13,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,287 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-12-09 19:17:13,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 19:17:13,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-12-09 19:17:13,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,289 INFO L225 Difference]: With dead ends: 101 [2020-12-09 19:17:13,289 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 19:17:13,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 19:17:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 19:17:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-12-09 19:17:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-09 19:17:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-12-09 19:17:13,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 33 [2020-12-09 19:17:13,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,295 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-12-09 19:17:13,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 19:17:13,295 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-12-09 19:17:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-12-09 19:17:13,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,296 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] [2020-12-09 19:17:13,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-09 19:17:13,296 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]=== [2020-12-09 19:17:13,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1035643475, now seen corresponding path program 1 times [2020-12-09 19:17:13,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976460496] [2020-12-09 19:17:13,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-09 19:17:13,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976460496] [2020-12-09 19:17:13,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:17:13,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:17:13,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702063795] [2020-12-09 19:17:13,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:17:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:17:13,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:17:13,331 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 6 states. [2020-12-09 19:17:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,359 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-12-09 19:17:13,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:17:13,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-12-09 19:17:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,360 INFO L225 Difference]: With dead ends: 110 [2020-12-09 19:17:13,360 INFO L226 Difference]: Without dead ends: 109 [2020-12-09 19:17:13,361 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 [2020-12-09 19:17:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-09 19:17:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-12-09 19:17:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-09 19:17:13,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-12-09 19:17:13,366 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 48 [2020-12-09 19:17:13,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,366 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-12-09 19:17:13,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:17:13,367 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-12-09 19:17:13,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-09 19:17:13,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,368 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] [2020-12-09 19:17:13,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-09 19:17:13,368 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]=== [2020-12-09 19:17:13,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:13,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1488967228, now seen corresponding path program 1 times [2020-12-09 19:17:13,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:13,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817006106] [2020-12-09 19:17:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 19:17:13,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817006106] [2020-12-09 19:17:13,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127460840] [2020-12-09 19:17:13,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 19:17:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 19:17:13,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:13,712 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 19:17:13,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:13,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 17 [2020-12-09 19:17:13,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028679755] [2020-12-09 19:17:13,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 19:17:13,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:13,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 19:17:13,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-12-09 19:17:13,714 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 12 states. [2020-12-09 19:17:13,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:13,811 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-12-09 19:17:13,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 19:17:13,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-12-09 19:17:13,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:13,812 INFO L225 Difference]: With dead ends: 100 [2020-12-09 19:17:13,812 INFO L226 Difference]: Without dead ends: 99 [2020-12-09 19:17:13,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-12-09 19:17:13,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-09 19:17:13,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-12-09 19:17:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-09 19:17:13,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-12-09 19:17:13,818 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 40 [2020-12-09 19:17:13,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:13,818 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-12-09 19:17:13,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 19:17:13,818 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-12-09 19:17:13,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-09 19:17:13,819 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:13,819 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] [2020-12-09 19:17:14,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-09 19:17:14,020 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]=== [2020-12-09 19:17:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1798417111, now seen corresponding path program 1 times [2020-12-09 19:17:14,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:14,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887248247] [2020-12-09 19:17:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-09 19:17:14,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887248247] [2020-12-09 19:17:14,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110454720] [2020-12-09 19:17:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:14,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:17:14,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:14,130 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-09 19:17:14,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:14,243 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-09 19:17:14,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1914439442] [2020-12-09 19:17:14,258 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2020-12-09 19:17:14,258 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:17:14,262 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) [2020-12-09 19:17:14,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:17:14,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-12-09 19:17:14,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173097033] [2020-12-09 19:17:14,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 19:17:14,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:14,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 19:17:14,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-12-09 19:17:14,263 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 14 states. [2020-12-09 19:17:14,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:14,415 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2020-12-09 19:17:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-09 19:17:14,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-12-09 19:17:14,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:14,416 INFO L225 Difference]: With dead ends: 217 [2020-12-09 19:17:14,416 INFO L226 Difference]: Without dead ends: 135 [2020-12-09 19:17:14,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-12-09 19:17:14,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-09 19:17:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2020-12-09 19:17:14,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-09 19:17:14,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-12-09 19:17:14,423 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 47 [2020-12-09 19:17:14,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:14,423 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-12-09 19:17:14,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 19:17:14,423 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-12-09 19:17:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-09 19:17:14,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:14,424 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] [2020-12-09 19:17:14,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-09 19:17:14,625 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]=== [2020-12-09 19:17:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:14,626 INFO L82 PathProgramCache]: Analyzing trace with hash 695736933, now seen corresponding path program 1 times [2020-12-09 19:17:14,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:14,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328728734] [2020-12-09 19:17:14,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 19:17:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328728734] [2020-12-09 19:17:14,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118140812] [2020-12-09 19:17:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 19:17:14,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 19:17:14,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-09 19:17:14,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-12-09 19:17:14,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9] total 15 [2020-12-09 19:17:14,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279365284] [2020-12-09 19:17:14,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 19:17:14,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:14,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 19:17:14,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-09 19:17:14,825 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 8 states. [2020-12-09 19:17:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:14,865 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2020-12-09 19:17:14,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 19:17:14,865 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-12-09 19:17:14,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:14,866 INFO L225 Difference]: With dead ends: 111 [2020-12-09 19:17:14,866 INFO L226 Difference]: Without dead ends: 110 [2020-12-09 19:17:14,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-09 19:17:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-09 19:17:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-12-09 19:17:14,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-09 19:17:14,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-12-09 19:17:14,871 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2020-12-09 19:17:14,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:14,872 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-12-09 19:17:14,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 19:17:14,872 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-12-09 19:17:14,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-12-09 19:17:14,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:14,873 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] [2020-12-09 19:17:15,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-09 19:17:15,074 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]=== [2020-12-09 19:17:15,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:15,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1252678887, now seen corresponding path program 1 times [2020-12-09 19:17:15,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:15,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375076707] [2020-12-09 19:17:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-09 19:17:15,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375076707] [2020-12-09 19:17:15,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059785432] [2020-12-09 19:17:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:15,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:15,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 19:17:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:15,201 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-09 19:17:15,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:15,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-09 19:17:15,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1154612763] [2020-12-09 19:17:15,303 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-12-09 19:17:15,303 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:17:15,303 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) [2020-12-09 19:17:15,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:17:15,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-12-09 19:17:15,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333092456] [2020-12-09 19:17:15,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 19:17:15,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:15,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 19:17:15,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-12-09 19:17:15,305 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 10 states. [2020-12-09 19:17:15,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:15,328 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-12-09 19:17:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-09 19:17:15,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-12-09 19:17:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:15,330 INFO L225 Difference]: With dead ends: 135 [2020-12-09 19:17:15,330 INFO L226 Difference]: Without dead ends: 125 [2020-12-09 19:17:15,330 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 [2020-12-09 19:17:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-09 19:17:15,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-12-09 19:17:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 19:17:15,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-12-09 19:17:15,335 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 60 [2020-12-09 19:17:15,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:15,336 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-12-09 19:17:15,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 19:17:15,336 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-12-09 19:17:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-09 19:17:15,338 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:17:15,338 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] [2020-12-09 19:17:15,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-09 19:17:15,540 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]=== [2020-12-09 19:17:15,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:17:15,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1980651882, now seen corresponding path program 2 times [2020-12-09 19:17:15,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:17:15,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651564685] [2020-12-09 19:17:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:17:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:17:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 62 proven. 271 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-12-09 19:17:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651564685] [2020-12-09 19:17:15,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013811117] [2020-12-09 19:17:15,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:15,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-09 19:17:15,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 19:17:15,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 19:17:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:17:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-12-09 19:17:16,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 19:17:16,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-12-09 19:17:16,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [6565905] [2020-12-09 19:17:16,841 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-12-09 19:17:16,841 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 19:17:16,842 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) [2020-12-09 19:17:16,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 19:17:16,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2020-12-09 19:17:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103423583] [2020-12-09 19:17:16,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-09 19:17:16,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:17:16,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-09 19:17:16,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2020-12-09 19:17:16,844 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 30 states. [2020-12-09 19:17:17,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:17:17,057 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-12-09 19:17:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-09 19:17:17,058 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 250 [2020-12-09 19:17:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:17:17,058 INFO L225 Difference]: With dead ends: 189 [2020-12-09 19:17:17,058 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 19:17:17,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2020-12-09 19:17:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 19:17:17,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 19:17:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 19:17:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 19:17:17,059 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 250 [2020-12-09 19:17:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:17:17,059 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 19:17:17,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-09 19:17:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 19:17:17,060 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 19:17:17,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 19:17:17,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 19:17:17,591 INFO L262 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L265 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-12-09 19:17:17,592 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|))) [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,592 INFO L262 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 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|))) [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 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|))) [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,593 INFO L262 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-12-09 19:17:17,594 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))) [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 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))) [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L262 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,594 INFO L265 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 19:17:17,595 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-12-09 19:17:17,595 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-09 19:17:17,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:17:17 BoogieIcfgContainer [2020-12-09 19:17:17,599 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:17:17,600 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:17:17,600 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:17:17,600 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:17:17,600 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:17:12" (3/4) ... [2020-12-09 19:17:17,603 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 19:17:17,608 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-12-09 19:17:17,608 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-12-09 19:17:17,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-12-09 19:17:17,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 19:17:17,613 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 19:17:17,639 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_96754714-e777-4a75-a4b2-ff61576f82ea/bin/utaipan/witness.graphml [2020-12-09 19:17:17,639 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:17:17,640 INFO L168 Benchmark]: Toolchain (without parser) took 5870.08 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 63.9 MB in the beginning and 122.2 MB in the end (delta: -58.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:17,640 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory was 80.3 MB in the beginning and 80.2 MB in the end (delta: 71.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:17:17,641 INFO L168 Benchmark]: CACSL2BoogieTranslator took 143.18 ms. Allocated memory is still 100.7 MB. Free memory was 63.8 MB in the beginning and 78.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:17,641 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.82 ms. Allocated memory is still 100.7 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:17:17,641 INFO L168 Benchmark]: Boogie Preprocessor took 11.94 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 76.5 MB in the end (delta: 826.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:17:17,641 INFO L168 Benchmark]: RCFGBuilder took 213.45 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 63.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:17,642 INFO L168 Benchmark]: TraceAbstraction took 5434.99 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 62.7 MB in the beginning and 125.4 MB in the end (delta: -62.6 MB). Peak memory consumption was 90.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:17,642 INFO L168 Benchmark]: Witness Printer took 39.29 ms. Allocated memory is still 176.2 MB. Free memory was 125.4 MB in the beginning and 122.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:17:17,644 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 100.7 MB. Free memory was 80.3 MB in the beginning and 80.2 MB in the end (delta: 71.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 143.18 ms. Allocated memory is still 100.7 MB. Free memory was 63.8 MB in the beginning and 78.6 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.82 ms. Allocated memory is still 100.7 MB. Free memory was 78.6 MB in the beginning and 77.3 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 11.94 ms. Allocated memory is still 100.7 MB. Free memory was 77.3 MB in the beginning and 76.5 MB in the end (delta: 826.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 213.45 ms. Allocated memory is still 100.7 MB. Free memory was 76.4 MB in the beginning and 63.3 MB in the end (delta: 13.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5434.99 ms. Allocated memory was 100.7 MB in the beginning and 176.2 MB in the end (delta: 75.5 MB). Free memory was 62.7 MB in the beginning and 125.4 MB in the end (delta: -62.6 MB). Peak memory consumption was 90.5 MB. Max. memory is 16.1 GB. * Witness Printer took 39.29 ms. Allocated memory is still 176.2 MB. Free memory was 125.4 MB in the beginning and 122.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 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: 5.0s, OverallIterations: 19, TraceHistogramMax: 25, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 719 SDtfs, 287 SDslu, 2021 SDs, 0 SdLazy, 960 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 997 GetRequests, 850 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s 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: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 103 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 237 PreInvPairs, 253 NumberOfFragments, 103 HoareAnnotationTreeSize, 237 FomulaSimplifications, 873 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 668 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.1s 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...