./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.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_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0837a1e1d82be1b28ccf3514392f1b01c88a9160 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 03:03:22,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:03:22,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:03:22,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:03:22,896 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:03:22,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:03:22,899 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:03:22,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:03:22,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:03:22,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:03:22,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:03:22,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:03:22,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:03:22,916 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:03:22,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:03:22,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:03:22,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:03:22,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:03:22,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:03:22,938 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:03:22,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:03:22,949 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:03:22,951 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:03:22,952 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:03:22,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:03:22,962 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:03:22,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:03:22,964 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:03:22,964 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:03:22,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:03:22,966 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:03:22,967 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:03:22,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:03:22,969 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:03:22,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:03:22,971 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:03:22,972 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:03:22,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:03:22,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:03:22,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:03:22,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:03:22,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-28 03:03:23,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:03:23,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:03:23,007 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:03:23,007 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:03:23,008 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:03:23,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:03:23,009 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:03:23,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:03:23,010 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:03:23,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:03:23,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:03:23,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:03:23,014 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-28 03:03:23,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:03:23,015 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:03:23,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:03:23,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:03:23,017 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:03:23,017 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:03:23,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:03:23,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:03:23,018 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:03:23,018 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:03:23,019 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:03:23,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:03:23,020 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:03:23,020 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:03:23,020 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:03:23,021 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2020-11-28 03:03:23,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:03:23,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:03:23,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:03:23,343 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:03:23,344 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:03:23,345 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-11-28 03:03:23,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/data/9e0c20b91/80428bb7b4984b1c8c6a4c1b27917197/FLAG558791531 [2020-11-28 03:03:23,934 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:03:23,937 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2020-11-28 03:03:23,947 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/data/9e0c20b91/80428bb7b4984b1c8c6a4c1b27917197/FLAG558791531 [2020-11-28 03:03:24,286 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/data/9e0c20b91/80428bb7b4984b1c8c6a4c1b27917197 [2020-11-28 03:03:24,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:03:24,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:03:24,293 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:24,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:03:24,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:03:24,298 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e380a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24, skipping insertion in model container [2020-11-28 03:03:24,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:03:24,326 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:03:24,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:24,498 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:03:24,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:03:24,540 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:03:24,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24 WrapperNode [2020-11-28 03:03:24,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:03:24,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:24,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:03:24,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:03:24,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,580 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:03:24,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:03:24,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:03:24,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:03:24,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,591 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,592 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,597 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... [2020-11-28 03:03:24,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:03:24,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:03:24,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:03:24,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:03:24,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/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 03:03:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-28 03:03:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-28 03:03:24,680 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-28 03:03:24,680 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-28 03:03:24,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:03:24,682 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:03:24,950 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:03:24,951 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-28 03:03:24,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:24 BoogieIcfgContainer [2020-11-28 03:03:24,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:03:24,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:03:24,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:03:24,963 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:03:24,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:03:24" (1/3) ... [2020-11-28 03:03:24,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339059bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:24, skipping insertion in model container [2020-11-28 03:03:24,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:03:24" (2/3) ... [2020-11-28 03:03:24,964 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339059bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:03:24, skipping insertion in model container [2020-11-28 03:03:24,964 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:24" (3/3) ... [2020-11-28 03:03:24,966 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2020-11-28 03:03:24,992 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:03:24,996 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-28 03:03:25,009 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-28 03:03:25,042 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:03:25,042 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:03:25,042 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:03:25,042 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:03:25,043 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:03:25,043 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:03:25,043 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:03:25,043 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:03:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-28 03:03:25,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 03:03:25,064 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:25,065 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:25,066 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 03:03:25,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:25,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1656652383, now seen corresponding path program 1 times [2020-11-28 03:03:25,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:25,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184613589] [2020-11-28 03:03:25,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,332 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 03:03:25,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184613589] [2020-11-28 03:03:25,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:25,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694103492] [2020-11-28 03:03:25,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:03:25,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:25,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:03:25,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:25,362 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 7 states. [2020-11-28 03:03:25,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:25,671 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-11-28 03:03:25,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:03:25,672 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2020-11-28 03:03:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:25,696 INFO L225 Difference]: With dead ends: 86 [2020-11-28 03:03:25,696 INFO L226 Difference]: Without dead ends: 79 [2020-11-28 03:03:25,699 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 03:03:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-28 03:03:25,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-11-28 03:03:25,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-28 03:03:25,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2020-11-28 03:03:25,758 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 8 [2020-11-28 03:03:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:25,759 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2020-11-28 03:03:25,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:03:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2020-11-28 03:03:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-28 03:03:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:25,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:25,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:03:25,761 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 03:03:25,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:25,762 INFO L82 PathProgramCache]: Analyzing trace with hash -183383641, now seen corresponding path program 1 times [2020-11-28 03:03:25,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:25,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767378934] [2020-11-28 03:03:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:25,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,799 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 03:03:25,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767378934] [2020-11-28 03:03:25,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:25,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:25,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400306639] [2020-11-28 03:03:25,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:03:25,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:25,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:03:25,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:03:25,803 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand 3 states. [2020-11-28 03:03:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:25,829 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2020-11-28 03:03:25,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:03:25,832 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-28 03:03:25,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:25,834 INFO L225 Difference]: With dead ends: 70 [2020-11-28 03:03:25,834 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 03:03:25,835 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 03:03:25,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 03:03:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-11-28 03:03:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-28 03:03:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-11-28 03:03:25,861 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 9 [2020-11-28 03:03:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:25,862 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-11-28 03:03:25,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:03:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-11-28 03:03:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 03:03:25,863 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:25,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:25,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:03:25,863 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 03:03:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:25,864 INFO L82 PathProgramCache]: Analyzing trace with hash -138388889, now seen corresponding path program 1 times [2020-11-28 03:03:25,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:25,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917526017] [2020-11-28 03:03:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,911 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 03:03:25,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917526017] [2020-11-28 03:03:25,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:25,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:25,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277773488] [2020-11-28 03:03:25,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:03:25,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:25,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:03:25,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:03:25,914 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 3 states. [2020-11-28 03:03:25,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:25,927 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2020-11-28 03:03:25,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:03:25,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-28 03:03:25,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:25,929 INFO L225 Difference]: With dead ends: 65 [2020-11-28 03:03:25,929 INFO L226 Difference]: Without dead ends: 64 [2020-11-28 03:03:25,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:03:25,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-11-28 03:03:25,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-11-28 03:03:25,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-28 03:03:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-11-28 03:03:25,941 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 11 [2020-11-28 03:03:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:25,941 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-11-28 03:03:25,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:03:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-11-28 03:03:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 03:03:25,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:25,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:25,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:03:25,943 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 03:03:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:25,944 INFO L82 PathProgramCache]: Analyzing trace with hash 4911801, now seen corresponding path program 1 times [2020-11-28 03:03:25,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:25,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46835299] [2020-11-28 03:03:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:25,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:25,986 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 03:03:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46835299] [2020-11-28 03:03:25,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:25,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:03:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427684478] [2020-11-28 03:03:25,987 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:25,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:25,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:25,988 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 4 states. [2020-11-28 03:03:26,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,022 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2020-11-28 03:03:26,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:03:26,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-28 03:03:26,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,024 INFO L225 Difference]: With dead ends: 85 [2020-11-28 03:03:26,025 INFO L226 Difference]: Without dead ends: 84 [2020-11-28 03:03:26,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 03:03:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-28 03:03:26,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-11-28 03:03:26,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-28 03:03:26,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 96 transitions. [2020-11-28 03:03:26,042 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 96 transitions. Word has length 12 [2020-11-28 03:03:26,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,042 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 96 transitions. [2020-11-28 03:03:26,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:26,043 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 96 transitions. [2020-11-28 03:03:26,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:03:26,043 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,044 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:26,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 03:03:26,044 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 03:03:26,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,045 INFO L82 PathProgramCache]: Analyzing trace with hash 2115393736, now seen corresponding path program 1 times [2020-11-28 03:03:26,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550975780] [2020-11-28 03:03:26,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,093 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 03:03:26,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550975780] [2020-11-28 03:03:26,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:26,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:26,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211472536] [2020-11-28 03:03:26,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:03:26,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:26,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:03:26,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:03:26,096 INFO L87 Difference]: Start difference. First operand 74 states and 96 transitions. Second operand 3 states. [2020-11-28 03:03:26,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,126 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2020-11-28 03:03:26,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:03:26,127 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-11-28 03:03:26,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,128 INFO L225 Difference]: With dead ends: 74 [2020-11-28 03:03:26,128 INFO L226 Difference]: Without dead ends: 73 [2020-11-28 03:03:26,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 03:03:26,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-28 03:03:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-11-28 03:03:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-28 03:03:26,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 94 transitions. [2020-11-28 03:03:26,141 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 94 transitions. Word has length 16 [2020-11-28 03:03:26,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,149 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 94 transitions. [2020-11-28 03:03:26,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:03:26,149 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 94 transitions. [2020-11-28 03:03:26,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 03:03:26,150 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,150 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:26,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 03:03:26,151 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 03:03:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1152696420, now seen corresponding path program 1 times [2020-11-28 03:03:26,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425988334] [2020-11-28 03:03:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,213 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 03:03:26,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425988334] [2020-11-28 03:03:26,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:26,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:03:26,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585131041] [2020-11-28 03:03:26,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:26,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:26,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:26,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:26,216 INFO L87 Difference]: Start difference. First operand 73 states and 94 transitions. Second operand 4 states. [2020-11-28 03:03:26,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,251 INFO L93 Difference]: Finished difference Result 94 states and 126 transitions. [2020-11-28 03:03:26,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:03:26,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-11-28 03:03:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,255 INFO L225 Difference]: With dead ends: 94 [2020-11-28 03:03:26,255 INFO L226 Difference]: Without dead ends: 93 [2020-11-28 03:03:26,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 03:03:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-28 03:03:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 79. [2020-11-28 03:03:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-28 03:03:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-11-28 03:03:26,281 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 17 [2020-11-28 03:03:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,281 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-11-28 03:03:26,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:26,281 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-11-28 03:03:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:03:26,285 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,285 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:26,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 03:03:26,286 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 03:03:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1079409517, now seen corresponding path program 1 times [2020-11-28 03:03:26,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142130365] [2020-11-28 03:03:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:03:26,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142130365] [2020-11-28 03:03:26,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:26,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:26,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608583141] [2020-11-28 03:03:26,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:03:26,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:03:26,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:03:26,362 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 5 states. [2020-11-28 03:03:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,466 INFO L93 Difference]: Finished difference Result 125 states and 159 transitions. [2020-11-28 03:03:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:03:26,468 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 03:03:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,470 INFO L225 Difference]: With dead ends: 125 [2020-11-28 03:03:26,470 INFO L226 Difference]: Without dead ends: 75 [2020-11-28 03:03:26,472 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 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 03:03:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-28 03:03:26,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-11-28 03:03:26,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-28 03:03:26,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-11-28 03:03:26,485 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2020-11-28 03:03:26,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,485 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-11-28 03:03:26,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:03:26,485 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-11-28 03:03:26,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-28 03:03:26,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,487 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:26,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 03:03:26,487 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 03:03:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1643853139, now seen corresponding path program 1 times [2020-11-28 03:03:26,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099953324] [2020-11-28 03:03:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,581 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 03:03:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099953324] [2020-11-28 03:03:26,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:26,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:26,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037135535] [2020-11-28 03:03:26,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:26,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:26,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:26,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:26,584 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-11-28 03:03:26,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,677 INFO L93 Difference]: Finished difference Result 149 states and 206 transitions. [2020-11-28 03:03:26,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:03:26,677 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-28 03:03:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,679 INFO L225 Difference]: With dead ends: 149 [2020-11-28 03:03:26,680 INFO L226 Difference]: Without dead ends: 91 [2020-11-28 03:03:26,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 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 03:03:26,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-28 03:03:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2020-11-28 03:03:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-28 03:03:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-11-28 03:03:26,696 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 21 [2020-11-28 03:03:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,697 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-11-28 03:03:26,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-11-28 03:03:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-28 03:03:26,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,699 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] [2020-11-28 03:03:26,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:03:26,700 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 03:03:26,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,700 INFO L82 PathProgramCache]: Analyzing trace with hash 105489077, now seen corresponding path program 1 times [2020-11-28 03:03:26,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899021071] [2020-11-28 03:03:26,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:03:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 03:03:26,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,795 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 03:03:26,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899021071] [2020-11-28 03:03:26,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:26,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595134097] [2020-11-28 03:03:26,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:26,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:26,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:26,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:26,798 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 6 states. [2020-11-28 03:03:26,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:26,897 INFO L93 Difference]: Finished difference Result 158 states and 210 transitions. [2020-11-28 03:03:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:03:26,897 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-28 03:03:26,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:26,899 INFO L225 Difference]: With dead ends: 158 [2020-11-28 03:03:26,899 INFO L226 Difference]: Without dead ends: 95 [2020-11-28 03:03:26,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 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 03:03:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-28 03:03:26,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87. [2020-11-28 03:03:26,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-11-28 03:03:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 108 transitions. [2020-11-28 03:03:26,915 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 108 transitions. Word has length 32 [2020-11-28 03:03:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:26,915 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 108 transitions. [2020-11-28 03:03:26,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 108 transitions. [2020-11-28 03:03:26,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-28 03:03:26,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:26,917 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] [2020-11-28 03:03:26,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-28 03:03:26,918 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 03:03:26,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:26,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1291302577, now seen corresponding path program 1 times [2020-11-28 03:03:26,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:26,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973429543] [2020-11-28 03:03:26,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:03:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 03:03:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:26,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-11-28 03:03:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,022 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 03:03:27,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973429543] [2020-11-28 03:03:27,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:27,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:03:27,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827302798] [2020-11-28 03:03:27,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:27,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:27,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:27,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:27,025 INFO L87 Difference]: Start difference. First operand 87 states and 108 transitions. Second operand 4 states. [2020-11-28 03:03:27,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:27,062 INFO L93 Difference]: Finished difference Result 94 states and 118 transitions. [2020-11-28 03:03:27,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:03:27,063 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-11-28 03:03:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:27,065 INFO L225 Difference]: With dead ends: 94 [2020-11-28 03:03:27,065 INFO L226 Difference]: Without dead ends: 93 [2020-11-28 03:03:27,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 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 03:03:27,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-28 03:03:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2020-11-28 03:03:27,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-28 03:03:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 112 transitions. [2020-11-28 03:03:27,086 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 112 transitions. Word has length 35 [2020-11-28 03:03:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:27,087 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 112 transitions. [2020-11-28 03:03:27,087 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 112 transitions. [2020-11-28 03:03:27,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-28 03:03:27,092 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:27,092 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] [2020-11-28 03:03:27,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-28 03:03:27,093 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 03:03:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -552500514, now seen corresponding path program 1 times [2020-11-28 03:03:27,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:27,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607044588] [2020-11-28 03:03:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-11-28 03:03:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-28 03:03:27,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,169 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 03:03:27,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607044588] [2020-11-28 03:03:27,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:27,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:27,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177610207] [2020-11-28 03:03:27,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:03:27,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:27,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:03:27,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:03:27,173 INFO L87 Difference]: Start difference. First operand 91 states and 112 transitions. Second operand 3 states. [2020-11-28 03:03:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:27,196 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-11-28 03:03:27,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:03:27,196 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-11-28 03:03:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:27,198 INFO L225 Difference]: With dead ends: 91 [2020-11-28 03:03:27,198 INFO L226 Difference]: Without dead ends: 90 [2020-11-28 03:03:27,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 03:03:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-28 03:03:27,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-11-28 03:03:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-28 03:03:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-11-28 03:03:27,219 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 110 transitions. Word has length 31 [2020-11-28 03:03:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:27,220 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-11-28 03:03:27,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:03:27,220 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 110 transitions. [2020-11-28 03:03:27,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-28 03:03:27,222 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:27,222 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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 03:03:27,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-28 03:03:27,222 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 03:03:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:27,223 INFO L82 PathProgramCache]: Analyzing trace with hash 930510463, now seen corresponding path program 1 times [2020-11-28 03:03:27,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:27,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142172028] [2020-11-28 03:03:27,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:27,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:27,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:03:27,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142172028] [2020-11-28 03:03:27,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:27,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059156660] [2020-11-28 03:03:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:27,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:27,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:27,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:27,371 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. Second operand 6 states. [2020-11-28 03:03:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:27,427 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-11-28 03:03:27,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:03:27,428 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-11-28 03:03:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:27,430 INFO L225 Difference]: With dead ends: 90 [2020-11-28 03:03:27,430 INFO L226 Difference]: Without dead ends: 89 [2020-11-28 03:03:27,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-28 03:03:27,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-11-28 03:03:27,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-28 03:03:27,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-28 03:03:27,448 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 36 [2020-11-28 03:03:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:27,449 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-28 03:03:27,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-28 03:03:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-28 03:03:27,450 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:27,450 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] [2020-11-28 03:03:27,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-28 03:03:27,451 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 03:03:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:27,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1111626321, now seen corresponding path program 1 times [2020-11-28 03:03:27,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:27,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478931224] [2020-11-28 03:03:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:27,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:03:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,552 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 03:03:27,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478931224] [2020-11-28 03:03:27,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:27,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:03:27,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171924552] [2020-11-28 03:03:27,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:03:27,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:03:27,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:03:27,555 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-11-28 03:03:27,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:27,619 INFO L93 Difference]: Finished difference Result 99 states and 120 transitions. [2020-11-28 03:03:27,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 03:03:27,620 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-11-28 03:03:27,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:27,621 INFO L225 Difference]: With dead ends: 99 [2020-11-28 03:03:27,621 INFO L226 Difference]: Without dead ends: 98 [2020-11-28 03:03:27,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:03:27,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-28 03:03:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2020-11-28 03:03:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-28 03:03:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 106 transitions. [2020-11-28 03:03:27,634 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 106 transitions. Word has length 46 [2020-11-28 03:03:27,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:27,634 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-11-28 03:03:27,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:03:27,634 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 106 transitions. [2020-11-28 03:03:27,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-28 03:03:27,640 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:27,641 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] [2020-11-28 03:03:27,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-28 03:03:27,641 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 03:03:27,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:27,641 INFO L82 PathProgramCache]: Analyzing trace with hash 138300185, now seen corresponding path program 1 times [2020-11-28 03:03:27,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:27,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115331242] [2020-11-28 03:03:27,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,768 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 03:03:27,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115331242] [2020-11-28 03:03:27,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534383619] [2020-11-28 03:03:27,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/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 03:03:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:27,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:03:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-28 03:03:28,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:03:28,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-11-28 03:03:28,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907760752] [2020-11-28 03:03:28,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-28 03:03:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-28 03:03:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-28 03:03:28,035 INFO L87 Difference]: Start difference. First operand 88 states and 106 transitions. Second operand 7 states. [2020-11-28 03:03:28,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:28,295 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2020-11-28 03:03:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:03:28,295 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 45 [2020-11-28 03:03:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:28,297 INFO L225 Difference]: With dead ends: 116 [2020-11-28 03:03:28,297 INFO L226 Difference]: Without dead ends: 115 [2020-11-28 03:03:28,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:03:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-28 03:03:28,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-11-28 03:03:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-28 03:03:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2020-11-28 03:03:28,322 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 45 [2020-11-28 03:03:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:28,322 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2020-11-28 03:03:28,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-28 03:03:28,323 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2020-11-28 03:03:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-28 03:03:28,325 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:28,326 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 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, 1, 1] [2020-11-28 03:03:28,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-28 03:03:28,541 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 03:03:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:28,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1156205799, now seen corresponding path program 1 times [2020-11-28 03:03:28,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:28,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587643863] [2020-11-28 03:03:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:28,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:03:28,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587643863] [2020-11-28 03:03:28,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65188174] [2020-11-28 03:03:28,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/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 03:03:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:03:28,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-28 03:03:28,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:03:28,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:03:28,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684593485] [2020-11-28 03:03:28,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:03:28,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:28,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:03:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:03:28,747 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand 8 states. [2020-11-28 03:03:28,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:28,841 INFO L93 Difference]: Finished difference Result 224 states and 282 transitions. [2020-11-28 03:03:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:03:28,842 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2020-11-28 03:03:28,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:28,844 INFO L225 Difference]: With dead ends: 224 [2020-11-28 03:03:28,844 INFO L226 Difference]: Without dead ends: 145 [2020-11-28 03:03:28,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:03:28,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-11-28 03:03:28,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 132. [2020-11-28 03:03:28,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-28 03:03:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2020-11-28 03:03:28,861 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 43 [2020-11-28 03:03:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:28,862 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2020-11-28 03:03:28,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:03:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2020-11-28 03:03:28,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-28 03:03:28,865 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:28,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1] [2020-11-28 03:03:29,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-28 03:03:29,082 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 03:03:29,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:29,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1154921966, now seen corresponding path program 1 times [2020-11-28 03:03:29,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:29,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741535349] [2020-11-28 03:03:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:29,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-28 03:03:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,127 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 03:03:29,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741535349] [2020-11-28 03:03:29,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:29,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:03:29,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721393727] [2020-11-28 03:03:29,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-28 03:03:29,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:29,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:03:29,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:03:29,130 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand 3 states. [2020-11-28 03:03:29,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:29,153 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-11-28 03:03:29,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:03:29,154 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-11-28 03:03:29,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:29,156 INFO L225 Difference]: With dead ends: 132 [2020-11-28 03:03:29,156 INFO L226 Difference]: Without dead ends: 131 [2020-11-28 03:03:29,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 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 03:03:29,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-28 03:03:29,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-11-28 03:03:29,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-28 03:03:29,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 162 transitions. [2020-11-28 03:03:29,176 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 162 transitions. Word has length 43 [2020-11-28 03:03:29,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:29,179 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 162 transitions. [2020-11-28 03:03:29,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-28 03:03:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 162 transitions. [2020-11-28 03:03:29,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-28 03:03:29,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:29,181 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 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, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:29,181 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-28 03:03:29,181 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 03:03:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1442842648, now seen corresponding path program 1 times [2020-11-28 03:03:29,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:29,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313751993] [2020-11-28 03:03:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-28 03:03:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-28 03:03:29,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313751993] [2020-11-28 03:03:29,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:03:29,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:03:29,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624315524] [2020-11-28 03:03:29,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:03:29,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:29,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:03:29,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:03:29,251 INFO L87 Difference]: Start difference. First operand 131 states and 162 transitions. Second operand 4 states. [2020-11-28 03:03:29,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:29,275 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2020-11-28 03:03:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:03:29,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-11-28 03:03:29,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:29,277 INFO L225 Difference]: With dead ends: 140 [2020-11-28 03:03:29,277 INFO L226 Difference]: Without dead ends: 132 [2020-11-28 03:03:29,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 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 03:03:29,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-11-28 03:03:29,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-11-28 03:03:29,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-28 03:03:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 161 transitions. [2020-11-28 03:03:29,305 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 161 transitions. Word has length 44 [2020-11-28 03:03:29,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:29,306 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 161 transitions. [2020-11-28 03:03:29,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:03:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 161 transitions. [2020-11-28 03:03:29,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-28 03:03:29,307 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:03:29,307 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-28 03:03:29,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-28 03:03:29,307 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 03:03:29,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:03:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1995865818, now seen corresponding path program 2 times [2020-11-28 03:03:29,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:03:29,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464961066] [2020-11-28 03:03:29,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:03:29,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:03:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-11-28 03:03:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-28 03:03:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-28 03:03:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:03:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:03:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-28 03:03:29,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464961066] [2020-11-28 03:03:29,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235552820] [2020-11-28 03:03:29,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/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 03:03:29,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:03:29,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:03:29,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 03:03:29,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:03:29,631 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-28 03:03:29,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:03:29,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:03:29,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861612756] [2020-11-28 03:03:29,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-28 03:03:29,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:03:29,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-28 03:03:29,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:03:29,637 INFO L87 Difference]: Start difference. First operand 132 states and 161 transitions. Second operand 9 states. [2020-11-28 03:03:29,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:03:29,793 INFO L93 Difference]: Finished difference Result 173 states and 211 transitions. [2020-11-28 03:03:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:03:29,794 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 75 [2020-11-28 03:03:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:03:29,795 INFO L225 Difference]: With dead ends: 173 [2020-11-28 03:03:29,795 INFO L226 Difference]: Without dead ends: 0 [2020-11-28 03:03:29,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-28 03:03:29,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-28 03:03:29,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-28 03:03:29,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-28 03:03:29,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:03:29,799 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2020-11-28 03:03:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:03:29,799 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:03:29,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-28 03:03:29,799 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:03:29,800 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-28 03:03:30,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-28 03:03:30,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-28 03:03:30,503 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 12 [2020-11-28 03:03:30,638 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2020-11-28 03:03:30,683 INFO L274 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,684 INFO L274 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-11-28 03:03:30,684 INFO L274 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,684 INFO L274 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-11-28 03:03:30,684 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,684 INFO L277 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-11-28 03:03:30,684 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,685 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-11-28 03:03:30,685 INFO L270 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (= |rec1_#in~i| rec1_~i) (<= 1 rec1_~i))) [2020-11-28 03:03:30,685 INFO L274 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,685 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,685 INFO L274 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,685 INFO L274 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,686 INFO L270 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (or (and (= |rec1_#in~i| rec1_~i) (<= 1 |rec1_#in~i|) (<= |rec1_#t~ret0| 1)) (not (<= |rec1_#in~i| 2147483647))) [2020-11-28 03:03:30,686 INFO L274 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,686 INFO L274 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,686 INFO L274 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,686 INFO L274 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,686 INFO L270 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (let ((.cse0 (not (<= |rec1_#in~i| 2147483647)))) (and (or .cse0 (and (= |rec1_#in~i| rec1_~i) (<= 1 rec1_~i) (<= |rec1_#t~ret1| 0))) (or .cse0 (<= |rec1_#t~ret0| 1)))) [2020-11-28 03:03:30,686 INFO L274 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-11-28 03:03:30,687 INFO L270 CegarLoopResult]: At program point L20(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))) [2020-11-28 03:03:30,687 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L20-2(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,688 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) (<= 1 |rec2_#t~ret3|))) (not (<= |rec2_#in~j| 0))) [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,688 INFO L274 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L277 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-28 03:03:30,689 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-28 03:03:30,690 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-11-28 03:03:30,690 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-28 03:03:30,690 INFO L274 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-11-28 03:03:30,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:03:30 BoogieIcfgContainer [2020-11-28 03:03:30,695 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:03:30,696 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:03:30,696 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:03:30,696 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:03:30,697 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:03:24" (3/4) ... [2020-11-28 03:03:30,700 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-28 03:03:30,707 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-11-28 03:03:30,707 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-11-28 03:03:30,716 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-28 03:03:30,717 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-28 03:03:30,777 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_45158e38-1fb3-4663-9706-2268d66c4089/bin/uautomizer/witness.graphml [2020-11-28 03:03:30,777 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:03:30,778 INFO L168 Benchmark]: Toolchain (without parser) took 6486.29 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 81.1 MB in the beginning and 82.8 MB in the end (delta: -1.7 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,778 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 83.9 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:03:30,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.63 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 87.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,779 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 109.1 MB. Free memory was 87.9 MB in the beginning and 86.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:03:30,780 INFO L168 Benchmark]: Boogie Preprocessor took 18.10 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 85.8 MB in the end (delta: 419.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,780 INFO L168 Benchmark]: RCFGBuilder took 352.52 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 73.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,781 INFO L168 Benchmark]: TraceAbstraction took 5741.69 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 73.2 MB in the beginning and 86.0 MB in the end (delta: -12.7 MB). Peak memory consumption was 65.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,781 INFO L168 Benchmark]: Witness Printer took 80.93 ms. Allocated memory is still 159.4 MB. Free memory was 86.0 MB in the beginning and 82.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:03:30,783 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 83.9 MB. Free memory was 41.1 MB in the beginning and 41.1 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.63 ms. Allocated memory is still 109.1 MB. Free memory was 81.1 MB in the beginning and 87.9 MB in the end (delta: -6.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 30.59 ms. Allocated memory is still 109.1 MB. Free memory was 87.9 MB in the beginning and 86.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.10 ms. Allocated memory is still 109.1 MB. Free memory was 86.2 MB in the beginning and 85.8 MB in the end (delta: 419.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 352.52 ms. Allocated memory is still 109.1 MB. Free memory was 85.8 MB in the beginning and 73.7 MB in the end (delta: 12.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5741.69 ms. Allocated memory was 109.1 MB in the beginning and 159.4 MB in the end (delta: 50.3 MB). Free memory was 73.2 MB in the beginning and 86.0 MB in the end (delta: -12.7 MB). Peak memory consumption was 65.5 MB. Max. memory is 16.1 GB. * Witness Printer took 80.93 ms. Allocated memory is still 159.4 MB. Free memory was 86.0 MB in the beginning and 82.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.9s, OverallIterations: 18, TraceHistogramMax: 10, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 688 SDtfs, 231 SDslu, 1656 SDs, 0 SdLazy, 529 SolverSat, 58 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 354 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=132occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 18 MinimizatonAttempts, 89 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 241 PreInvPairs, 259 NumberOfFragments, 96 HoareAnnotationTreeSize, 241 FomulaSimplifications, 973 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 8 FomulaSimplificationsInter, 313 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 706 NumberOfCodeBlocks, 706 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 685 ConstructedInterpolants, 0 QuantifiedInterpolants, 45897 SizeOfPredicates, 4 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 21 InterpolantComputations, 16 PerfectInterpolantSequences, 690/752 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...