./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 a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/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-a4ecdab [2020-11-28 07:41:32,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:41:32,973 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:41:33,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:41:33,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:41:33,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:41:33,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:41:33,068 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:41:33,071 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:41:33,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:41:33,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:41:33,078 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:41:33,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:41:33,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:41:33,089 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:41:33,091 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:41:33,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:41:33,097 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:41:33,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:41:33,106 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:41:33,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:41:33,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:41:33,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:41:33,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:41:33,125 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:41:33,126 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:41:33,126 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:41:33,128 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:41:33,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:41:33,131 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:41:33,131 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:41:33,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:41:33,135 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:41:33,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:41:33,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:41:33,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:41:33,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:41:33,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:41:33,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:41:33,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:41:33,143 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:41:33,145 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/config/svcomp-Overflow-64bit-Taipan_Default.epf [2020-11-28 07:41:33,191 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:41:33,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:41:33,196 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:41:33,197 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:41:33,197 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:41:33,197 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:41:33,198 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:41:33,198 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:41:33,198 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:41:33,198 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:41:33,199 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:41:33,200 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:41:33,200 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:41:33,200 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:41:33,201 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:41:33,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:41:33,202 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:41:33,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:41:33,202 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:41:33,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 07:41:33,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:41:33,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 07:41:33,203 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 07:41:33,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 07:41:33,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:41:33,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 07:41:33,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:41:33,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:41:33,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:41:33,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:33,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:41:33,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:41:33,208 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 07:41:33,208 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:41:33,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:41:33,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 07:41:33,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:41:33,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:41:33,209 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_3fa53fc2-4923-4cbc-a8db-d28aa0353900/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2020-11-28 07:41:33,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:41:33,546 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:41:33,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:41:33,553 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:41:33,554 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:41:33,555 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-11-28 07:41:33,646 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/data/8ea133c42/1d682e3cebf14b30baaa52fe5984eba6/FLAG7460524cd [2020-11-28 07:41:34,119 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:41:34,119 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-11-28 07:41:34,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/data/8ea133c42/1d682e3cebf14b30baaa52fe5984eba6/FLAG7460524cd [2020-11-28 07:41:34,493 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/data/8ea133c42/1d682e3cebf14b30baaa52fe5984eba6 [2020-11-28 07:41:34,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:41:34,497 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:41:34,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:34,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:41:34,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:41:34,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6673e28a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34, skipping insertion in model container [2020-11-28 07:41:34,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:41:34,546 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:41:34,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:34,720 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:41:34,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:41:34,774 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:41:34,775 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34 WrapperNode [2020-11-28 07:41:34,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:41:34,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:34,777 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:41:34,777 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:41:34,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,790 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:41:34,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:41:34,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:41:34,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:41:34,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... [2020-11-28 07:41:34,823 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:41:34,824 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:41:34,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:41:34,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:41:34,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:41:34,904 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-28 07:41:34,904 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-28 07:41:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-28 07:41:34,905 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-28 07:41:34,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:41:34,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:41:35,226 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:41:35,226 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 07:41:35,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:35 BoogieIcfgContainer [2020-11-28 07:41:35,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:41:35,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:41:35,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:41:35,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:41:35,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:41:34" (1/3) ... [2020-11-28 07:41:35,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44002439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:35, skipping insertion in model container [2020-11-28 07:41:35,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:41:34" (2/3) ... [2020-11-28 07:41:35,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44002439 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:41:35, skipping insertion in model container [2020-11-28 07:41:35,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:35" (3/3) ... [2020-11-28 07:41:35,261 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b.c [2020-11-28 07:41:35,273 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:41:35,282 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-28 07:41:35,303 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-28 07:41:35,329 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:41:35,330 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 07:41:35,330 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:41:35,330 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:41:35,330 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:41:35,330 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:41:35,331 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:41:35,331 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:41:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-28 07:41:35,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:41:35,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,361 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:41:35,362 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]=== [2020-11-28 07:41:35,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,374 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2020-11-28 07:41:35,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261621782] [2020-11-28 07:41:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:35,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261621782] [2020-11-28 07:41:35,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:35,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:35,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288059359] [2020-11-28 07:41:35,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:41:35,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:35,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:41:35,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:41:35,631 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 5 states. [2020-11-28 07:41:35,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,798 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-11-28 07:41:35,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:41:35,800 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-28 07:41:35,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,810 INFO L225 Difference]: With dead ends: 60 [2020-11-28 07:41:35,810 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 07:41:35,813 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 [2020-11-28 07:41:35,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 07:41:35,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-11-28 07:41:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-28 07:41:35,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-11-28 07:41:35,861 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 5 [2020-11-28 07:41:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,862 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-11-28 07:41:35,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:41:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-11-28 07:41:35,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:41:35,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:41:35,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:41:35,864 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]=== [2020-11-28 07:41:35,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,865 INFO L82 PathProgramCache]: Analyzing trace with hash -2121179530, now seen corresponding path program 1 times [2020-11-28 07:41:35,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110240549] [2020-11-28 07:41:35,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:35,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110240549] [2020-11-28 07:41:35,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:35,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:35,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191554360] [2020-11-28 07:41:35,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:35,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:35,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:35,892 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 3 states. [2020-11-28 07:41:35,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:35,931 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-11-28 07:41:35,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:35,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-28 07:41:35,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:35,934 INFO L225 Difference]: With dead ends: 52 [2020-11-28 07:41:35,934 INFO L226 Difference]: Without dead ends: 51 [2020-11-28 07:41:35,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:35,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-28 07:41:35,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-28 07:41:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-28 07:41:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-28 07:41:35,947 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-28 07:41:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:35,947 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-28 07:41:35,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-28 07:41:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-28 07:41:35,948 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:35,948 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:35,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:41:35,949 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]=== [2020-11-28 07:41:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -2074588191, now seen corresponding path program 1 times [2020-11-28 07:41:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:35,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712816229] [2020-11-28 07:41:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712816229] [2020-11-28 07:41:36,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:41:36,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929130786] [2020-11-28 07:41:36,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 07:41:36,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 07:41:36,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:41:36,109 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 7 states. [2020-11-28 07:41:36,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,364 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-11-28 07:41:36,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:41:36,366 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-28 07:41:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,368 INFO L225 Difference]: With dead ends: 77 [2020-11-28 07:41:36,368 INFO L226 Difference]: Without dead ends: 76 [2020-11-28 07:41:36,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:41:36,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-28 07:41:36,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-11-28 07:41:36,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 07:41:36,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-11-28 07:41:36,383 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2020-11-28 07:41:36,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,383 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-11-28 07:41:36,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 07:41:36,383 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-11-28 07:41:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:41:36,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,384 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:41:36,385 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]=== [2020-11-28 07:41:36,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,385 INFO L82 PathProgramCache]: Analyzing trace with hash 112275557, now seen corresponding path program 1 times [2020-11-28 07:41:36,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626233485] [2020-11-28 07:41:36,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626233485] [2020-11-28 07:41:36,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:36,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012059534] [2020-11-28 07:41:36,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:36,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:36,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,433 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 3 states. [2020-11-28 07:41:36,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,463 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-11-28 07:41:36,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:36,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 07:41:36,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,468 INFO L225 Difference]: With dead ends: 69 [2020-11-28 07:41:36,468 INFO L226 Difference]: Without dead ends: 68 [2020-11-28 07:41:36,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-28 07:41:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-11-28 07:41:36,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 07:41:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-11-28 07:41:36,482 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 11 [2020-11-28 07:41:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,482 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-11-28 07:41:36,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-11-28 07:41:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:41:36,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:41:36,484 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]=== [2020-11-28 07:41:36,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2048531074, now seen corresponding path program 1 times [2020-11-28 07:41:36,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114237017] [2020-11-28 07:41:36,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:41:36,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114237017] [2020-11-28 07:41:36,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:41:36,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729607661] [2020-11-28 07:41:36,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:36,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:36,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:36,553 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 6 states. [2020-11-28 07:41:36,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,610 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-11-28 07:41:36,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:41:36,611 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-28 07:41:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,613 INFO L225 Difference]: With dead ends: 125 [2020-11-28 07:41:36,613 INFO L226 Difference]: Without dead ends: 86 [2020-11-28 07:41:36,614 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 [2020-11-28 07:41:36,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-28 07:41:36,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-11-28 07:41:36,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-28 07:41:36,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-11-28 07:41:36,633 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 16 [2020-11-28 07:41:36,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,633 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-11-28 07:41:36,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:36,633 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-11-28 07:41:36,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-28 07:41:36,634 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,635 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:41:36,635 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]=== [2020-11-28 07:41:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash -57180086, now seen corresponding path program 1 times [2020-11-28 07:41:36,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642479273] [2020-11-28 07:41:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:41:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642479273] [2020-11-28 07:41:36,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:36,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005835206] [2020-11-28 07:41:36,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:36,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:36,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,700 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 3 states. [2020-11-28 07:41:36,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,724 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-11-28 07:41:36,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:36,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-28 07:41:36,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,726 INFO L225 Difference]: With dead ends: 76 [2020-11-28 07:41:36,726 INFO L226 Difference]: Without dead ends: 75 [2020-11-28 07:41:36,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-28 07:41:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-28 07:41:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-28 07:41:36,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-11-28 07:41:36,740 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 18 [2020-11-28 07:41:36,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,751 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-11-28 07:41:36,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-11-28 07:41:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:41:36,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,752 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:41:36,753 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]=== [2020-11-28 07:41:36,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,753 INFO L82 PathProgramCache]: Analyzing trace with hash -599425808, now seen corresponding path program 1 times [2020-11-28 07:41:36,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810959743] [2020-11-28 07:41:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:41:36,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810959743] [2020-11-28 07:41:36,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:36,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088683906] [2020-11-28 07:41:36,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:36,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:36,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,780 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 3 states. [2020-11-28 07:41:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,799 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-11-28 07:41:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:36,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-28 07:41:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,801 INFO L225 Difference]: With dead ends: 75 [2020-11-28 07:41:36,801 INFO L226 Difference]: Without dead ends: 74 [2020-11-28 07:41:36,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-28 07:41:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-28 07:41:36,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 07:41:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-11-28 07:41:36,816 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 19 [2020-11-28 07:41:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,818 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-11-28 07:41:36,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-11-28 07:41:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 07:41:36,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,819 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:41:36,820 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]=== [2020-11-28 07:41:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1772582622, now seen corresponding path program 1 times [2020-11-28 07:41:36,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190869987] [2020-11-28 07:41:36,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:41:36,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190869987] [2020-11-28 07:41:36,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:36,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122838394] [2020-11-28 07:41:36,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:36,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:36,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:36,856 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 4 states. [2020-11-28 07:41:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,878 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-11-28 07:41:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:36,879 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-28 07:41:36,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,880 INFO L225 Difference]: With dead ends: 95 [2020-11-28 07:41:36,880 INFO L226 Difference]: Without dead ends: 94 [2020-11-28 07:41:36,881 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 [2020-11-28 07:41:36,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-28 07:41:36,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-11-28 07:41:36,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-28 07:41:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-11-28 07:41:36,892 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 19 [2020-11-28 07:41:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,892 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-11-28 07:41:36,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-11-28 07:41:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 07:41:36,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,893 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:41:36,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:41:36,894 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]=== [2020-11-28 07:41:36,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1402330794, now seen corresponding path program 1 times [2020-11-28 07:41:36,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550141938] [2020-11-28 07:41:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:41:36,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550141938] [2020-11-28 07:41:36,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:36,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:36,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163235905] [2020-11-28 07:41:36,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:36,932 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 4 states. [2020-11-28 07:41:36,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:36,965 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-11-28 07:41:36,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:36,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-28 07:41:36,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:36,969 INFO L225 Difference]: With dead ends: 89 [2020-11-28 07:41:36,969 INFO L226 Difference]: Without dead ends: 83 [2020-11-28 07:41:36,970 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 [2020-11-28 07:41:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-28 07:41:36,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-28 07:41:36,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-28 07:41:36,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-11-28 07:41:36,986 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 20 [2020-11-28 07:41:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:36,987 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-11-28 07:41:36,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-11-28 07:41:36,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 07:41:36,992 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:36,993 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] [2020-11-28 07:41:36,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 07:41:36,994 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]=== [2020-11-28 07:41:36,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:36,995 INFO L82 PathProgramCache]: Analyzing trace with hash 921726737, now seen corresponding path program 1 times [2020-11-28 07:41:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:36,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22454093] [2020-11-28 07:41:36,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-28 07:41:37,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22454093] [2020-11-28 07:41:37,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:41:37,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130486072] [2020-11-28 07:41:37,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:37,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:37,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:37,073 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 6 states. [2020-11-28 07:41:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,162 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2020-11-28 07:41:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:41:37,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-28 07:41:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,164 INFO L225 Difference]: With dead ends: 167 [2020-11-28 07:41:37,164 INFO L226 Difference]: Without dead ends: 101 [2020-11-28 07:41:37,167 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 [2020-11-28 07:41:37,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-28 07:41:37,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-11-28 07:41:37,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-28 07:41:37,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-28 07:41:37,178 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 23 [2020-11-28 07:41:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,178 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-28 07:41:37,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:37,178 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-28 07:41:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-28 07:41:37,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,180 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] [2020-11-28 07:41:37,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 07:41:37,180 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]=== [2020-11-28 07:41:37,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash 970950199, now seen corresponding path program 1 times [2020-11-28 07:41:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386911952] [2020-11-28 07:41:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-28 07:41:37,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386911952] [2020-11-28 07:41:37,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:41:37,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749875977] [2020-11-28 07:41:37,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:37,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:37,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:37,249 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-11-28 07:41:37,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,327 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-11-28 07:41:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:41:37,327 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-28 07:41:37,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,328 INFO L225 Difference]: With dead ends: 176 [2020-11-28 07:41:37,328 INFO L226 Difference]: Without dead ends: 105 [2020-11-28 07:41:37,329 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 [2020-11-28 07:41:37,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-28 07:41:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-11-28 07:41:37,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-28 07:41:37,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-11-28 07:41:37,347 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 34 [2020-11-28 07:41:37,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,347 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-28 07:41:37,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:37,347 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-11-28 07:41:37,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-28 07:41:37,348 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,349 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] [2020-11-28 07:41:37,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 07:41:37,349 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]=== [2020-11-28 07:41:37,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1027694963, now seen corresponding path program 1 times [2020-11-28 07:41:37,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363136126] [2020-11-28 07:41:37,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 07:41:37,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363136126] [2020-11-28 07:41:37,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:41:37,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656824297] [2020-11-28 07:41:37,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:41:37,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:41:37,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:41:37,411 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 4 states. [2020-11-28 07:41:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,439 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-11-28 07:41:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:41:37,439 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-11-28 07:41:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,441 INFO L225 Difference]: With dead ends: 104 [2020-11-28 07:41:37,441 INFO L226 Difference]: Without dead ends: 103 [2020-11-28 07:41:37,442 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 [2020-11-28 07:41:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-28 07:41:37,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-11-28 07:41:37,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-28 07:41:37,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-11-28 07:41:37,452 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 37 [2020-11-28 07:41:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,452 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-11-28 07:41:37,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:41:37,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-11-28 07:41:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-28 07:41:37,458 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,458 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] [2020-11-28 07:41:37,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 07:41:37,459 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]=== [2020-11-28 07:41:37,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash 860890908, now seen corresponding path program 1 times [2020-11-28 07:41:37,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192420065] [2020-11-28 07:41:37,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 07:41:37,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192420065] [2020-11-28 07:41:37,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:41:37,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253733196] [2020-11-28 07:41:37,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 07:41:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 07:41:37,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:37,499 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 3 states. [2020-11-28 07:41:37,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,546 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-11-28 07:41:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 07:41:37,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-11-28 07:41:37,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,548 INFO L225 Difference]: With dead ends: 101 [2020-11-28 07:41:37,548 INFO L226 Difference]: Without dead ends: 100 [2020-11-28 07:41:37,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 07:41:37,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-28 07:41:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-28 07:41:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-28 07:41:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-11-28 07:41:37,562 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 33 [2020-11-28 07:41:37,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,562 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-11-28 07:41:37,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 07:41:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-11-28 07:41:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-11-28 07:41:37,564 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,564 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] [2020-11-28 07:41:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 07:41:37,564 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]=== [2020-11-28 07:41:37,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1035643475, now seen corresponding path program 1 times [2020-11-28 07:41:37,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890495001] [2020-11-28 07:41:37,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-28 07:41:37,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890495001] [2020-11-28 07:41:37,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:41:37,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 07:41:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069029736] [2020-11-28 07:41:37,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:41:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:41:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:41:37,689 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 6 states. [2020-11-28 07:41:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:37,741 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-11-28 07:41:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:41:37,741 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-11-28 07:41:37,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:37,743 INFO L225 Difference]: With dead ends: 110 [2020-11-28 07:41:37,743 INFO L226 Difference]: Without dead ends: 109 [2020-11-28 07:41:37,744 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 [2020-11-28 07:41:37,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-28 07:41:37,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-11-28 07:41:37,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-28 07:41:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-11-28 07:41:37,755 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 48 [2020-11-28 07:41:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:37,756 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-11-28 07:41:37,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:41:37,756 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-11-28 07:41:37,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-28 07:41:37,759 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:37,759 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] [2020-11-28 07:41:37,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-28 07:41:37,759 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]=== [2020-11-28 07:41:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1488967228, now seen corresponding path program 1 times [2020-11-28 07:41:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:37,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075441169] [2020-11-28 07:41:37,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 07:41:37,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075441169] [2020-11-28 07:41:37,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913276328] [2020-11-28 07:41:37,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:37,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:41:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 07:41:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 07:41:38,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:38,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [7] total 17 [2020-11-28 07:41:38,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787153290] [2020-11-28 07:41:38,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 07:41:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 07:41:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-11-28 07:41:38,300 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 12 states. [2020-11-28 07:41:38,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:38,518 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-11-28 07:41:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 07:41:38,519 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-11-28 07:41:38,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:38,520 INFO L225 Difference]: With dead ends: 100 [2020-11-28 07:41:38,521 INFO L226 Difference]: Without dead ends: 99 [2020-11-28 07:41:38,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2020-11-28 07:41:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-28 07:41:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-11-28 07:41:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-28 07:41:38,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-11-28 07:41:38,536 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 40 [2020-11-28 07:41:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:38,536 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-11-28 07:41:38,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 07:41:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-11-28 07:41:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-28 07:41:38,538 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:38,538 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] [2020-11-28 07:41:38,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 07:41:38,747 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]=== [2020-11-28 07:41:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:38,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1798417111, now seen corresponding path program 1 times [2020-11-28 07:41:38,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:38,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654875673] [2020-11-28 07:41:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 07:41:38,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654875673] [2020-11-28 07:41:38,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077176385] [2020-11-28 07:41:38,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:38,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:41:38,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 07:41:38,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:39,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-28 07:41:39,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197149138] [2020-11-28 07:41:39,196 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2020-11-28 07:41:39,196 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:39,201 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:41:39,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:41:39,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2020-11-28 07:41:39,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140596736] [2020-11-28 07:41:39,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-28 07:41:39,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:39,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-28 07:41:39,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-11-28 07:41:39,206 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 14 states. [2020-11-28 07:41:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:39,583 INFO L93 Difference]: Finished difference Result 217 states and 263 transitions. [2020-11-28 07:41:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-28 07:41:39,585 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 47 [2020-11-28 07:41:39,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:39,590 INFO L225 Difference]: With dead ends: 217 [2020-11-28 07:41:39,590 INFO L226 Difference]: Without dead ends: 135 [2020-11-28 07:41:39,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-28 07:41:39,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-11-28 07:41:39,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 111. [2020-11-28 07:41:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-11-28 07:41:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2020-11-28 07:41:39,605 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 47 [2020-11-28 07:41:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:39,606 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2020-11-28 07:41:39,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-28 07:41:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2020-11-28 07:41:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 07:41:39,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:39,608 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] [2020-11-28 07:41:39,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-28 07:41:39,835 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]=== [2020-11-28 07:41:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash 695736933, now seen corresponding path program 1 times [2020-11-28 07:41:39,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:39,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674283660] [2020-11-28 07:41:39,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 07:41:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674283660] [2020-11-28 07:41:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904250003] [2020-11-28 07:41:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:41:40,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:41:40,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-28 07:41:40,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2020-11-28 07:41:40,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [9] total 15 [2020-11-28 07:41:40,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264648532] [2020-11-28 07:41:40,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:41:40,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:40,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:41:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:41:40,179 INFO L87 Difference]: Start difference. First operand 111 states and 124 transitions. Second operand 8 states. [2020-11-28 07:41:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:40,256 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2020-11-28 07:41:40,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:41:40,256 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-11-28 07:41:40,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,258 INFO L225 Difference]: With dead ends: 111 [2020-11-28 07:41:40,258 INFO L226 Difference]: Without dead ends: 110 [2020-11-28 07:41:40,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-11-28 07:41:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-11-28 07:41:40,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-11-28 07:41:40,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-11-28 07:41:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 123 transitions. [2020-11-28 07:41:40,267 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 123 transitions. Word has length 45 [2020-11-28 07:41:40,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,268 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 123 transitions. [2020-11-28 07:41:40,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:41:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 123 transitions. [2020-11-28 07:41:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-28 07:41:40,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,269 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] [2020-11-28 07:41:40,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-28 07:41:40,483 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]=== [2020-11-28 07:41:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1252678887, now seen corresponding path program 1 times [2020-11-28 07:41:40,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:40,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471217731] [2020-11-28 07:41:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,550 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-28 07:41:40,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471217731] [2020-11-28 07:41:40,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786594105] [2020-11-28 07:41:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/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 [2020-11-28 07:41:40,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:40,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 07:41:40,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-28 07:41:40,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-28 07:41:40,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [171312391] [2020-11-28 07:41:40,800 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-11-28 07:41:40,800 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:40,801 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:41:40,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:41:40,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2020-11-28 07:41:40,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176335432] [2020-11-28 07:41:40,805 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:41:40,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:40,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:41:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:41:40,809 INFO L87 Difference]: Start difference. First operand 110 states and 123 transitions. Second operand 10 states. [2020-11-28 07:41:40,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:40,863 INFO L93 Difference]: Finished difference Result 135 states and 153 transitions. [2020-11-28 07:41:40,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 07:41:40,864 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-11-28 07:41:40,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:40,865 INFO L225 Difference]: With dead ends: 135 [2020-11-28 07:41:40,865 INFO L226 Difference]: Without dead ends: 125 [2020-11-28 07:41:40,866 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 [2020-11-28 07:41:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-28 07:41:40,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-11-28 07:41:40,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-28 07:41:40,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 138 transitions. [2020-11-28 07:41:40,878 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 138 transitions. Word has length 60 [2020-11-28 07:41:40,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:40,878 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 138 transitions. [2020-11-28 07:41:40,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:41:40,878 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 138 transitions. [2020-11-28 07:41:40,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-11-28 07:41:40,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:41:40,886 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] [2020-11-28 07:41:41,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 07:41:41,103 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]=== [2020-11-28 07:41:41,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:41:41,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1980651882, now seen corresponding path program 2 times [2020-11-28 07:41:41,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:41:41,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069371104] [2020-11-28 07:41:41,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:41:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:41:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 62 proven. 271 refuted. 0 times theorem prover too weak. 1258 trivial. 0 not checked. [2020-11-28 07:41:41,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069371104] [2020-11-28 07:41:41,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010569179] [2020-11-28 07:41:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:41,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-28 07:41:41,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 07:41:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:41:41,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:41:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-11-28 07:41:41,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:41:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 1541 trivial. 0 not checked. [2020-11-28 07:41:43,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339928894] [2020-11-28 07:41:43,150 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2020-11-28 07:41:43,150 INFO L166 IcfgInterpreter]: Building call graph [2020-11-28 07:41:43,151 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:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-28 07:41:43,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-28 07:41:43,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2020-11-28 07:41:43,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470589593] [2020-11-28 07:41:43,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-28 07:41:43,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:41:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-28 07:41:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2020-11-28 07:41:43,162 INFO L87 Difference]: Start difference. First operand 125 states and 138 transitions. Second operand 30 states. [2020-11-28 07:41:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:41:43,749 INFO L93 Difference]: Finished difference Result 189 states and 208 transitions. [2020-11-28 07:41:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 07:41:43,750 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 250 [2020-11-28 07:41:43,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:41:43,751 INFO L225 Difference]: With dead ends: 189 [2020-11-28 07:41:43,751 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 07:41:43,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2020-11-28 07:41:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 07:41:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 07:41:43,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 07:41:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 07:41:43,753 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 250 [2020-11-28 07:41:43,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:41:43,753 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 07:41:43,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-28 07:41:43,753 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 07:41:43,753 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 07:41:43,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:41:43,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 07:41:44,445 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 13 [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,628 INFO L277 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-11-28 07:41:44,628 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L270 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|))) [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L270 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|))) [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,629 INFO L274 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L270 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|))) [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,630 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L270 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))) [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L270 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))) [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L277 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 07:41:44,631 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 07:41:44,632 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-11-28 07:41:44,632 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-28 07:41:44,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:41:44 BoogieIcfgContainer [2020-11-28 07:41:44,638 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:41:44,638 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:41:44,638 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:41:44,638 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:41:44,639 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:41:35" (3/4) ... [2020-11-28 07:41:44,642 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 07:41:44,648 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-11-28 07:41:44,648 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-11-28 07:41:44,657 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-28 07:41:44,657 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 07:41:44,657 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-28 07:41:44,724 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3fa53fc2-4923-4cbc-a8db-d28aa0353900/bin/utaipan/witness.graphml [2020-11-28 07:41:44,725 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:41:44,726 INFO L168 Benchmark]: Toolchain (without parser) took 10228.21 ms. Allocated memory was 88.1 MB in the beginning and 157.3 MB in the end (delta: 69.2 MB). Free memory was 55.7 MB in the beginning and 65.5 MB in the end (delta: -9.8 MB). Peak memory consumption was 59.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:44,726 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 36.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:44,727 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.16 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 55.5 MB in the beginning and 85.2 MB in the end (delta: -29.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:44,727 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.25 ms. Allocated memory is still 107.0 MB. Free memory was 85.2 MB in the beginning and 84.2 MB in the end (delta: 987.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:44,727 INFO L168 Benchmark]: Boogie Preprocessor took 17.09 ms. Allocated memory is still 107.0 MB. Free memory was 84.2 MB in the beginning and 83.3 MB in the end (delta: 978.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:41:44,728 INFO L168 Benchmark]: RCFGBuilder took 404.11 ms. Allocated memory is still 107.0 MB. Free memory was 83.3 MB in the beginning and 70.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:44,728 INFO L168 Benchmark]: TraceAbstraction took 9407.77 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 70.1 MB in the beginning and 67.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:44,729 INFO L168 Benchmark]: Witness Printer took 86.57 ms. Allocated memory is still 157.3 MB. Free memory was 67.6 MB in the beginning and 65.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:41:44,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 88.1 MB. Free memory was 45.9 MB in the beginning and 45.8 MB in the end (delta: 36.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.16 ms. Allocated memory was 88.1 MB in the beginning and 107.0 MB in the end (delta: 18.9 MB). Free memory was 55.5 MB in the beginning and 85.2 MB in the end (delta: -29.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.25 ms. Allocated memory is still 107.0 MB. Free memory was 85.2 MB in the beginning and 84.2 MB in the end (delta: 987.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.09 ms. Allocated memory is still 107.0 MB. Free memory was 84.2 MB in the beginning and 83.3 MB in the end (delta: 978.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 404.11 ms. Allocated memory is still 107.0 MB. Free memory was 83.3 MB in the beginning and 70.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9407.77 ms. Allocated memory was 107.0 MB in the beginning and 157.3 MB in the end (delta: 50.3 MB). Free memory was 70.1 MB in the beginning and 67.6 MB in the end (delta: 2.5 MB). Peak memory consumption was 79.5 MB. Max. memory is 16.1 GB. * Witness Printer took 86.57 ms. Allocated memory is still 157.3 MB. Free memory was 67.6 MB in the beginning and 65.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 42 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.6s, OverallIterations: 19, TraceHistogramMax: 25, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 719 SDtfs, 287 SDslu, 2021 SDs, 0 SdLazy, 960 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 997 GetRequests, 850 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 19 MinimizatonAttempts, 103 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 237 PreInvPairs, 253 NumberOfFragments, 103 HoareAnnotationTreeSize, 237 FomulaSimplifications, 873 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 668 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 1183 NumberOfCodeBlocks, 1033 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1596 ConstructedInterpolants, 0 QuantifiedInterpolants, 300466 SizeOfPredicates, 5 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...