./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:49:47,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:49:47,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:49:47,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:49:47,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:49:47,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:49:47,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:49:47,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:49:47,927 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:49:47,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:49:47,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:49:47,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:49:47,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:49:47,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:49:47,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:49:47,949 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:49:47,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:49:47,959 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:49:47,961 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:49:47,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:49:47,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:49:47,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:49:47,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:49:47,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:49:47,978 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:49:47,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:49:47,979 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:49:47,980 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:49:47,981 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:49:47,982 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:49:47,982 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:49:47,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:49:47,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:49:47,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:49:47,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:49:47,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:49:47,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:49:47,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:49:47,988 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:49:47,989 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:49:47,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:49:47,992 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/config/svcomp-Overflow-64bit-Automizer_Default.epf [2020-11-29 20:49:48,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:49:48,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:49:48,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:49:48,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:49:48,029 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:49:48,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:49:48,030 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:49:48,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:49:48,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:49:48,031 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 20:49:48,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 20:49:48,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 20:49:48,031 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-11-29 20:49:48,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:49:48,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:49:48,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 20:49:48,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:49:48,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:49:48,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 20:49:48,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 20:49:48,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 20:49:48,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:49:48,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 20:49:48,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 20:49:48,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:49:48,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 20:49:48,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 20:49:48,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:49:48,035 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_25d59393-1d33-44d5-adf9-76c5df7b4459/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2020-11-29 20:49:48,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:49:48,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:49:48,311 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:49:48,312 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:49:48,316 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:49:48,318 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-11-29 20:49:48,395 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/data/a85e632b0/4c5462ffea6541c188d1b561d7156db3/FLAG9f13bfbd0 [2020-11-29 20:49:48,841 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:49:48,842 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2020-11-29 20:49:48,854 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/data/a85e632b0/4c5462ffea6541c188d1b561d7156db3/FLAG9f13bfbd0 [2020-11-29 20:49:49,212 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/data/a85e632b0/4c5462ffea6541c188d1b561d7156db3 [2020-11-29 20:49:49,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:49:49,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:49:49,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:49:49,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:49:49,222 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:49:49,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8f720f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49, skipping insertion in model container [2020-11-29 20:49:49,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,232 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:49:49,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:49:49,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:49:49,398 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:49:49,416 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:49:49,453 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:49:49,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49 WrapperNode [2020-11-29 20:49:49,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:49:49,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:49:49,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:49:49,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:49:49,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,474 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:49:49,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:49:49,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:49:49,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:49:49,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,518 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,521 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... [2020-11-29 20:49:49,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:49:49,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:49:49,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:49:49,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:49:49,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/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 [2020-11-29 20:49:49,630 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2020-11-29 20:49:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2020-11-29 20:49:49,631 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2020-11-29 20:49:49,631 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2020-11-29 20:49:49,633 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:49:49,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:49:50,001 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:49:50,001 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-11-29 20:49:50,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:50 BoogieIcfgContainer [2020-11-29 20:49:50,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:49:50,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 20:49:50,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 20:49:50,009 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 20:49:50,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 08:49:49" (1/3) ... [2020-11-29 20:49:50,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286f16d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:49:50, skipping insertion in model container [2020-11-29 20:49:50,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:49:49" (2/3) ... [2020-11-29 20:49:50,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286f16d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 08:49:50, skipping insertion in model container [2020-11-29 20:49:50,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:50" (3/3) ... [2020-11-29 20:49:50,012 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1b.c [2020-11-29 20:49:50,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 20:49:50,026 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-29 20:49:50,038 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-29 20:49:50,063 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 20:49:50,063 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 20:49:50,064 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 20:49:50,064 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:49:50,064 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:49:50,064 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 20:49:50,064 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:49:50,064 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 20:49:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-29 20:49:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 20:49:50,086 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:50,087 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 20:49:50,088 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]=== [2020-11-29 20:49:50,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:50,093 INFO L82 PathProgramCache]: Analyzing trace with hash 70122184, now seen corresponding path program 1 times [2020-11-29 20:49:50,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:50,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482824510] [2020-11-29 20:49:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:50,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:49:50,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482824510] [2020-11-29 20:49:50,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:50,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:49:50,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138088972] [2020-11-29 20:49:50,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:49:50,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:50,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:49:50,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 20:49:50,308 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 5 states. [2020-11-29 20:49:50,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:50,458 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-11-29 20:49:50,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:49:50,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2020-11-29 20:49:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:50,481 INFO L225 Difference]: With dead ends: 62 [2020-11-29 20:49:50,488 INFO L226 Difference]: Without dead ends: 55 [2020-11-29 20:49:50,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-29 20:49:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2020-11-29 20:49:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-29 20:49:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2020-11-29 20:49:50,579 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 5 [2020-11-29 20:49:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:50,580 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2020-11-29 20:49:50,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:49:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2020-11-29 20:49:50,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 20:49:50,581 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:50,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 20:49:50,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 20:49:50,582 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]=== [2020-11-29 20:49:50,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:50,586 INFO L82 PathProgramCache]: Analyzing trace with hash -2121179530, now seen corresponding path program 1 times [2020-11-29 20:49:50,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:50,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733316079] [2020-11-29 20:49:50,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:49:50,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733316079] [2020-11-29 20:49:50,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:50,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:49:50,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938725543] [2020-11-29 20:49:50,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:49:50,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:50,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:49:50,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:50,622 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand 3 states. [2020-11-29 20:49:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:50,641 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-11-29 20:49:50,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:49:50,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-29 20:49:50,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:50,646 INFO L225 Difference]: With dead ends: 52 [2020-11-29 20:49:50,647 INFO L226 Difference]: Without dead ends: 51 [2020-11-29 20:49:50,649 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 [2020-11-29 20:49:50,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-29 20:49:50,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-11-29 20:49:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 20:49:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-29 20:49:50,668 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 6 [2020-11-29 20:49:50,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:50,669 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-29 20:49:50,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:49:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-29 20:49:50,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 20:49:50,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:50,671 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:50,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 20:49:50,673 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]=== [2020-11-29 20:49:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -2074588191, now seen corresponding path program 1 times [2020-11-29 20:49:50,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:50,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812708049] [2020-11-29 20:49:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:50,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:50,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:49:50,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812708049] [2020-11-29 20:49:50,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:50,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:49:50,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235616155] [2020-11-29 20:49:50,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:49:50,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:50,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:49:50,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:49:50,746 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 7 states. [2020-11-29 20:49:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:50,956 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-11-29 20:49:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 20:49:50,957 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-29 20:49:50,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:50,959 INFO L225 Difference]: With dead ends: 77 [2020-11-29 20:49:50,960 INFO L226 Difference]: Without dead ends: 76 [2020-11-29 20:49:50,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:49:50,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-29 20:49:50,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 65. [2020-11-29 20:49:50,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-29 20:49:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2020-11-29 20:49:50,994 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 10 [2020-11-29 20:49:50,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:50,995 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2020-11-29 20:49:50,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:49:50,996 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2020-11-29 20:49:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 20:49:50,997 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:50,997 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:50,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 20:49:50,998 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]=== [2020-11-29 20:49:50,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:50,999 INFO L82 PathProgramCache]: Analyzing trace with hash 112275557, now seen corresponding path program 1 times [2020-11-29 20:49:50,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316005705] [2020-11-29 20:49:51,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:49:51,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316005705] [2020-11-29 20:49:51,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:49:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554982311] [2020-11-29 20:49:51,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:49:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:49:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:51,045 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 3 states. [2020-11-29 20:49:51,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,076 INFO L93 Difference]: Finished difference Result 69 states and 91 transitions. [2020-11-29 20:49:51,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:49:51,077 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 20:49:51,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,079 INFO L225 Difference]: With dead ends: 69 [2020-11-29 20:49:51,079 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 20:49:51,080 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 [2020-11-29 20:49:51,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 20:49:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-11-29 20:49:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 20:49:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-11-29 20:49:51,097 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 11 [2020-11-29 20:49:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,097 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-11-29 20:49:51,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:49:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-11-29 20:49:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-29 20:49:51,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,098 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 20:49:51,099 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]=== [2020-11-29 20:49:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,099 INFO L82 PathProgramCache]: Analyzing trace with hash -2048531074, now seen corresponding path program 1 times [2020-11-29 20:49:51,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90808401] [2020-11-29 20:49:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:49:51,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90808401] [2020-11-29 20:49:51,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:49:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634072320] [2020-11-29 20:49:51,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:49:51,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:49:51,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:51,273 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 6 states. [2020-11-29 20:49:51,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,409 INFO L93 Difference]: Finished difference Result 125 states and 160 transitions. [2020-11-29 20:49:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:49:51,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-29 20:49:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,413 INFO L225 Difference]: With dead ends: 125 [2020-11-29 20:49:51,413 INFO L226 Difference]: Without dead ends: 86 [2020-11-29 20:49:51,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-29 20:49:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-29 20:49:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-11-29 20:49:51,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-29 20:49:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2020-11-29 20:49:51,441 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 16 [2020-11-29 20:49:51,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,441 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2020-11-29 20:49:51,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:49:51,442 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2020-11-29 20:49:51,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 20:49:51,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,444 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 20:49:51,445 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]=== [2020-11-29 20:49:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,446 INFO L82 PathProgramCache]: Analyzing trace with hash -57180086, now seen corresponding path program 1 times [2020-11-29 20:49:51,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380179846] [2020-11-29 20:49:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:49:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:49:51,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380179846] [2020-11-29 20:49:51,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:49:51,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138665828] [2020-11-29 20:49:51,501 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:49:51,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:49:51,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:51,502 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand 3 states. [2020-11-29 20:49:51,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,519 INFO L93 Difference]: Finished difference Result 76 states and 98 transitions. [2020-11-29 20:49:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:49:51,521 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-11-29 20:49:51,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,522 INFO L225 Difference]: With dead ends: 76 [2020-11-29 20:49:51,522 INFO L226 Difference]: Without dead ends: 75 [2020-11-29 20:49:51,523 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 [2020-11-29 20:49:51,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-29 20:49:51,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-11-29 20:49:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-11-29 20:49:51,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2020-11-29 20:49:51,545 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 18 [2020-11-29 20:49:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,546 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2020-11-29 20:49:51,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:49:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2020-11-29 20:49:51,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:49:51,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,549 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 20:49:51,551 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]=== [2020-11-29 20:49:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,552 INFO L82 PathProgramCache]: Analyzing trace with hash -599425808, now seen corresponding path program 1 times [2020-11-29 20:49:51,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639543942] [2020-11-29 20:49:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:51,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:49:51,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639543942] [2020-11-29 20:49:51,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:49:51,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134748631] [2020-11-29 20:49:51,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:49:51,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:49:51,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:51,601 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand 3 states. [2020-11-29 20:49:51,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,621 INFO L93 Difference]: Finished difference Result 75 states and 96 transitions. [2020-11-29 20:49:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:49:51,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-11-29 20:49:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,625 INFO L225 Difference]: With dead ends: 75 [2020-11-29 20:49:51,626 INFO L226 Difference]: Without dead ends: 74 [2020-11-29 20:49:51,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-29 20:49:51,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-29 20:49:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-29 20:49:51,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-11-29 20:49:51,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 19 [2020-11-29 20:49:51,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,644 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-11-29 20:49:51,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:49:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-11-29 20:49:51,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 20:49:51,645 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,646 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-29 20:49:51,647 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]=== [2020-11-29 20:49:51,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1772582622, now seen corresponding path program 1 times [2020-11-29 20:49:51,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524357321] [2020-11-29 20:49:51,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:49:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:49:51,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524357321] [2020-11-29 20:49:51,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:49:51,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056764608] [2020-11-29 20:49:51,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:49:51,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:49:51,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:49:51,700 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 4 states. [2020-11-29 20:49:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,726 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2020-11-29 20:49:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:49:51,727 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-11-29 20:49:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,728 INFO L225 Difference]: With dead ends: 95 [2020-11-29 20:49:51,729 INFO L226 Difference]: Without dead ends: 94 [2020-11-29 20:49:51,729 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 [2020-11-29 20:49:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-29 20:49:51,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2020-11-29 20:49:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 20:49:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2020-11-29 20:49:51,742 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 19 [2020-11-29 20:49:51,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,743 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2020-11-29 20:49:51,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:49:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2020-11-29 20:49:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-29 20:49:51,744 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,744 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-29 20:49:51,744 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]=== [2020-11-29 20:49:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1402330794, now seen corresponding path program 1 times [2020-11-29 20:49:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695076931] [2020-11-29 20:49:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:51,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:51,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:49:51,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695076931] [2020-11-29 20:49:51,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:49:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024192761] [2020-11-29 20:49:51,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:49:51,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:49:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:49:51,789 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand 4 states. [2020-11-29 20:49:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,807 INFO L93 Difference]: Finished difference Result 89 states and 110 transitions. [2020-11-29 20:49:51,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:49:51,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-11-29 20:49:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,808 INFO L225 Difference]: With dead ends: 89 [2020-11-29 20:49:51,808 INFO L226 Difference]: Without dead ends: 83 [2020-11-29 20:49:51,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:49:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-29 20:49:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-11-29 20:49:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 20:49:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-11-29 20:49:51,819 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 20 [2020-11-29 20:49:51,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,819 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-11-29 20:49:51,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:49:51,819 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-11-29 20:49:51,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 20:49:51,820 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:51,820 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:51,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-29 20:49:51,821 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]=== [2020-11-29 20:49:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash 921726737, now seen corresponding path program 1 times [2020-11-29 20:49:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:51,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636047382] [2020-11-29 20:49:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:49:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:49:51,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636047382] [2020-11-29 20:49:51,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:51,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:49:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431748742] [2020-11-29 20:49:51,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:49:51,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:51,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:49:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:51,887 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 6 states. [2020-11-29 20:49:51,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:51,978 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2020-11-29 20:49:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:49:51,983 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-29 20:49:51,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:51,984 INFO L225 Difference]: With dead ends: 167 [2020-11-29 20:49:51,985 INFO L226 Difference]: Without dead ends: 101 [2020-11-29 20:49:51,987 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 [2020-11-29 20:49:51,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-11-29 20:49:51,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2020-11-29 20:49:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-29 20:49:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-11-29 20:49:51,998 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 23 [2020-11-29 20:49:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:51,999 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-11-29 20:49:51,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:49:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-11-29 20:49:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-29 20:49:52,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:52,000 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:52,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-29 20:49:52,001 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]=== [2020-11-29 20:49:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash 970950199, now seen corresponding path program 1 times [2020-11-29 20:49:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:52,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003487798] [2020-11-29 20:49:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:49:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-29 20:49:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 20:49:52,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003487798] [2020-11-29 20:49:52,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:52,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:49:52,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678420946] [2020-11-29 20:49:52,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:49:52,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:49:52,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:52,092 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 6 states. [2020-11-29 20:49:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:52,171 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-11-29 20:49:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:49:52,171 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-11-29 20:49:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:52,172 INFO L225 Difference]: With dead ends: 176 [2020-11-29 20:49:52,172 INFO L226 Difference]: Without dead ends: 105 [2020-11-29 20:49:52,173 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 [2020-11-29 20:49:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-29 20:49:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2020-11-29 20:49:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 20:49:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-11-29 20:49:52,192 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 34 [2020-11-29 20:49:52,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:52,193 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-29 20:49:52,193 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:49:52,194 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2020-11-29 20:49:52,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-29 20:49:52,195 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:52,195 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:52,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-29 20:49:52,196 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]=== [2020-11-29 20:49:52,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:52,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1027694963, now seen corresponding path program 1 times [2020-11-29 20:49:52,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:52,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477964772] [2020-11-29 20:49:52,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:49:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-29 20:49:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 20:49:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 20:49:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477964772] [2020-11-29 20:49:52,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:52,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 20:49:52,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953568368] [2020-11-29 20:49:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 20:49:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:52,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 20:49:52,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 20:49:52,255 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand 4 states. [2020-11-29 20:49:52,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:52,280 INFO L93 Difference]: Finished difference Result 104 states and 127 transitions. [2020-11-29 20:49:52,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 20:49:52,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-11-29 20:49:52,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:52,283 INFO L225 Difference]: With dead ends: 104 [2020-11-29 20:49:52,283 INFO L226 Difference]: Without dead ends: 103 [2020-11-29 20:49:52,283 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 [2020-11-29 20:49:52,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-29 20:49:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2020-11-29 20:49:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 20:49:52,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2020-11-29 20:49:52,294 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 37 [2020-11-29 20:49:52,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:52,296 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-11-29 20:49:52,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 20:49:52,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2020-11-29 20:49:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-29 20:49:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:52,304 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:52,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-29 20:49:52,304 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]=== [2020-11-29 20:49:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1793772729, now seen corresponding path program 1 times [2020-11-29 20:49:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:52,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994443413] [2020-11-29 20:49:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:49:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-29 20:49:52,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-11-29 20:49:52,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-11-29 20:49:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994443413] [2020-11-29 20:49:52,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:52,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 20:49:52,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112299176] [2020-11-29 20:49:52,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 20:49:52,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:52,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 20:49:52,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 20:49:52,362 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand 3 states. [2020-11-29 20:49:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:52,372 INFO L93 Difference]: Finished difference Result 101 states and 121 transitions. [2020-11-29 20:49:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 20:49:52,372 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 38 [2020-11-29 20:49:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:52,374 INFO L225 Difference]: With dead ends: 101 [2020-11-29 20:49:52,374 INFO L226 Difference]: Without dead ends: 100 [2020-11-29 20:49:52,374 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 [2020-11-29 20:49:52,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-29 20:49:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-11-29 20:49:52,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-11-29 20:49:52,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2020-11-29 20:49:52,382 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 38 [2020-11-29 20:49:52,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:52,382 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2020-11-29 20:49:52,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 20:49:52,382 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2020-11-29 20:49:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-29 20:49:52,384 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:52,384 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:52,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-29 20:49:52,384 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]=== [2020-11-29 20:49:52,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:52,385 INFO L82 PathProgramCache]: Analyzing trace with hash -747989016, now seen corresponding path program 1 times [2020-11-29 20:49:52,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:52,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091501834] [2020-11-29 20:49:52,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:49:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,476 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-29 20:49:52,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091501834] [2020-11-29 20:49:52,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:49:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 20:49:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121696768] [2020-11-29 20:49:52,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:49:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:49:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:52,478 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand 6 states. [2020-11-29 20:49:52,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:52,550 INFO L93 Difference]: Finished difference Result 110 states and 131 transitions. [2020-11-29 20:49:52,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 20:49:52,550 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-11-29 20:49:52,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:52,552 INFO L225 Difference]: With dead ends: 110 [2020-11-29 20:49:52,552 INFO L226 Difference]: Without dead ends: 109 [2020-11-29 20:49:52,552 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 [2020-11-29 20:49:52,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-29 20:49:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-11-29 20:49:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-11-29 20:49:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2020-11-29 20:49:52,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 43 [2020-11-29 20:49:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:52,565 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2020-11-29 20:49:52,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:49:52,565 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2020-11-29 20:49:52,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-29 20:49:52,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:52,569 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:52,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-29 20:49:52,570 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]=== [2020-11-29 20:49:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:52,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1488967228, now seen corresponding path program 1 times [2020-11-29 20:49:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:52,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41458449] [2020-11-29 20:49:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:52,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 20:49:52,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41458449] [2020-11-29 20:49:52,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70328407] [2020-11-29 20:49:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/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 [2020-11-29 20:49:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:52,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:49:52,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 20:49:52,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:49:52,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-11-29 20:49:52,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253361137] [2020-11-29 20:49:52,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:49:52,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:49:52,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:49:52,924 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand 7 states. [2020-11-29 20:49:53,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:53,037 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2020-11-29 20:49:53,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:49:53,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-11-29 20:49:53,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:53,039 INFO L225 Difference]: With dead ends: 100 [2020-11-29 20:49:53,039 INFO L226 Difference]: Without dead ends: 99 [2020-11-29 20:49:53,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-11-29 20:49:53,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-29 20:49:53,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2020-11-29 20:49:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-29 20:49:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 116 transitions. [2020-11-29 20:49:53,047 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 116 transitions. Word has length 40 [2020-11-29 20:49:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:53,048 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 116 transitions. [2020-11-29 20:49:53,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:49:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 116 transitions. [2020-11-29 20:49:53,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-11-29 20:49:53,049 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:53,049 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:53,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 20:49:53,276 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]=== [2020-11-29 20:49:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash 822906818, now seen corresponding path program 1 times [2020-11-29 20:49:53,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:53,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675452101] [2020-11-29 20:49:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:53,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-11-29 20:49:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-11-29 20:49:53,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675452101] [2020-11-29 20:49:53,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248527692] [2020-11-29 20:49:53,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/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 [2020-11-29 20:49:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:53,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:49:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 20:49:53,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:49:53,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 12 [2020-11-29 20:49:53,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257397469] [2020-11-29 20:49:53,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 20:49:53,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:53,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 20:49:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:49:53,536 INFO L87 Difference]: Start difference. First operand 98 states and 116 transitions. Second operand 7 states. [2020-11-29 20:49:53,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:53,800 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2020-11-29 20:49:53,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:49:53,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 52 [2020-11-29 20:49:53,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:53,803 INFO L225 Difference]: With dead ends: 126 [2020-11-29 20:49:53,803 INFO L226 Difference]: Without dead ends: 125 [2020-11-29 20:49:53,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:49:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-29 20:49:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2020-11-29 20:49:53,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-11-29 20:49:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2020-11-29 20:49:53,819 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 52 [2020-11-29 20:49:53,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:53,820 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2020-11-29 20:49:53,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 20:49:53,821 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2020-11-29 20:49:53,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-29 20:49:53,822 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:53,822 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:54,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 20:49:54,048 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]=== [2020-11-29 20:49:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 695736933, now seen corresponding path program 1 times [2020-11-29 20:49:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:54,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711624370] [2020-11-29 20:49:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:54,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-11-29 20:49:54,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711624370] [2020-11-29 20:49:54,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638110233] [2020-11-29 20:49:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/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 [2020-11-29 20:49:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:49:54,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:54,290 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-11-29 20:49:54,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 20:49:54,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 12 [2020-11-29 20:49:54,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509533392] [2020-11-29 20:49:54,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 20:49:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:54,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 20:49:54,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-11-29 20:49:54,292 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand 5 states. [2020-11-29 20:49:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:54,424 INFO L93 Difference]: Finished difference Result 152 states and 185 transitions. [2020-11-29 20:49:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:49:54,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 45 [2020-11-29 20:49:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:54,427 INFO L225 Difference]: With dead ends: 152 [2020-11-29 20:49:54,427 INFO L226 Difference]: Without dead ends: 151 [2020-11-29 20:49:54,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:49:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-11-29 20:49:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2020-11-29 20:49:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-29 20:49:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 184 transitions. [2020-11-29 20:49:54,442 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 184 transitions. Word has length 45 [2020-11-29 20:49:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:54,443 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 184 transitions. [2020-11-29 20:49:54,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 20:49:54,443 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2020-11-29 20:49:54,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-11-29 20:49:54,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:54,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:49:54,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 20:49:54,672 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]=== [2020-11-29 20:49:54,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:54,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1252678887, now seen corresponding path program 1 times [2020-11-29 20:49:54,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:54,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407943207] [2020-11-29 20:49:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:54,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:54,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:54,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 20:49:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 20:49:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-29 20:49:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407943207] [2020-11-29 20:49:54,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606609415] [2020-11-29 20:49:54,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:49:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:54,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 20:49:54,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:54,833 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-11-29 20:49:54,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:49:54,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 20:49:54,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239793377] [2020-11-29 20:49:54,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 20:49:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:54,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 20:49:54,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:54,835 INFO L87 Difference]: Start difference. First operand 150 states and 184 transitions. Second operand 6 states. [2020-11-29 20:49:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:54,885 INFO L93 Difference]: Finished difference Result 159 states and 194 transitions. [2020-11-29 20:49:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 20:49:54,891 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-11-29 20:49:54,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:54,893 INFO L225 Difference]: With dead ends: 159 [2020-11-29 20:49:54,893 INFO L226 Difference]: Without dead ends: 155 [2020-11-29 20:49:54,894 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-29 20:49:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-29 20:49:54,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-11-29 20:49:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-11-29 20:49:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 189 transitions. [2020-11-29 20:49:54,910 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 189 transitions. Word has length 60 [2020-11-29 20:49:54,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:54,911 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 189 transitions. [2020-11-29 20:49:54,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 20:49:54,911 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 189 transitions. [2020-11-29 20:49:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-11-29 20:49:54,913 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:54,913 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, 1, 1] [2020-11-29 20:49:55,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-29 20:49:55,128 INFO L429 AbstractCegarLoop]: === Iteration 19 === [rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-11-29 20:49:55,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:55,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1438531096, now seen corresponding path program 2 times [2020-11-29 20:49:55,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:55,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114386704] [2020-11-29 20:49:55,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-29 20:49:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-11-29 20:49:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,259 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-29 20:49:55,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114386704] [2020-11-29 20:49:55,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082682140] [2020-11-29 20:49:55,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:49:55,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:49:55,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:49:55,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:49:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:55,390 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 64 proven. 28 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-29 20:49:55,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:49:55,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 20:49:55,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559605464] [2020-11-29 20:49:55,392 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 20:49:55,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:55,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 20:49:55,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-11-29 20:49:55,393 INFO L87 Difference]: Start difference. First operand 155 states and 189 transitions. Second operand 9 states. [2020-11-29 20:49:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:55,536 INFO L93 Difference]: Finished difference Result 252 states and 311 transitions. [2020-11-29 20:49:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 20:49:55,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-11-29 20:49:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:55,538 INFO L225 Difference]: With dead ends: 252 [2020-11-29 20:49:55,538 INFO L226 Difference]: Without dead ends: 97 [2020-11-29 20:49:55,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-29 20:49:55,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-29 20:49:55,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2020-11-29 20:49:55,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-29 20:49:55,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2020-11-29 20:49:55,547 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 77 [2020-11-29 20:49:55,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:55,548 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2020-11-29 20:49:55,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 20:49:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2020-11-29 20:49:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-11-29 20:49:55,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 20:49:55,553 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 9, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1] [2020-11-29 20:49:55,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:49:55,767 INFO L429 AbstractCegarLoop]: === Iteration 20 === [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]=== [2020-11-29 20:49:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:49:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash -151262980, now seen corresponding path program 2 times [2020-11-29 20:49:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:49:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232989926] [2020-11-29 20:49:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:49:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-29 20:49:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-29 20:49:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-29 20:49:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:55,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:56,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 20:49:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:56,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-11-29 20:49:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:56,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 20:49:56,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:56,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-29 20:49:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:49:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-11-29 20:49:56,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232989926] [2020-11-29 20:49:56,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335062810] [2020-11-29 20:49:56,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:49:56,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:49:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:49:56,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 20:49:56,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:49:56,243 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 48 proven. 78 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-11-29 20:49:56,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:49:56,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-11-29 20:49:56,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945857584] [2020-11-29 20:49:56,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-29 20:49:56,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:49:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 20:49:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-29 20:49:56,245 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand 12 states. [2020-11-29 20:49:56,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:49:56,490 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-11-29 20:49:56,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:49:56,490 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 124 [2020-11-29 20:49:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 20:49:56,490 INFO L225 Difference]: With dead ends: 95 [2020-11-29 20:49:56,490 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 20:49:56,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-11-29 20:49:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 20:49:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 20:49:56,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 20:49:56,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 20:49:56,492 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 124 [2020-11-29 20:49:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 20:49:56,492 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:49:56,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-29 20:49:56,492 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:49:56,492 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 20:49:56,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:49:56,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 20:49:57,248 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 19 [2020-11-29 20:49:57,475 INFO L274 CegarLoopResult]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,475 INFO L274 CegarLoopResult]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2020-11-29 20:49:57,475 INFO L274 CegarLoopResult]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,475 INFO L274 CegarLoopResult]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2020-11-29 20:49:57,475 INFO L274 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,475 INFO L277 CegarLoopResult]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point L12(lines 12 13) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L270 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 2147483646)) (or (not (<= |rec1_#in~i| 2147483647)) (= |rec1_#in~i| rec1_~i))) [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point L14-3(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point L14-4(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point L14-5(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L270 CegarLoopResult]: At program point L14-6(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 2147483646)) (or (not (<= |rec1_#in~i| 2147483647)) (and (= |rec1_#in~i| rec1_~i) (<= |rec1_#t~ret0| 1)))) [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,476 INFO L274 CegarLoopResult]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L14-7(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L270 CegarLoopResult]: At program point L14-8(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 2147483646)) (or (not (<= |rec1_#in~i| 2147483647)) (and (= |rec1_#in~i| rec1_~i) (<= |rec1_#t~ret0| 1) (<= |rec1_#t~ret1| 0)))) [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L14-9(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L14-10(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L14-11(line 14) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,477 INFO L274 CegarLoopResult]: For program point L18(lines 18 19) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L270 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (and (not (<= |rec2_#in~j| 0)) (or (not (<= |rec2_#in~j| 2147483647)) (= rec2_~j |rec2_#in~j|))) [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L270 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (let ((.cse0 (not (<= |rec2_#in~j| 2147483647)))) (and (or (and (<= |rec2_#t~ret3| 1) (<= 2 |rec2_#in~j|)) .cse0 (and (<= 1 rec2_~j) (<= |rec2_#t~ret3| 0))) (or .cse0 (= rec2_~j |rec2_#in~j|)))) [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point L20-5(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point L20-6(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point L20-7(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L277 CegarLoopResult]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2020-11-29 20:49:57,478 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 20:49:57,479 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 20:49:57,479 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 20:49:57,479 INFO L270 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (<= ULTIMATE.start_main_~x~0 2147483647) [2020-11-29 20:49:57,479 INFO L274 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-29 20:49:57,479 INFO L274 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-11-29 20:49:57,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 08:49:57 BoogieIcfgContainer [2020-11-29 20:49:57,491 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 20:49:57,492 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:49:57,492 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:49:57,492 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:49:57,498 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:49:50" (3/4) ... [2020-11-29 20:49:57,501 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 20:49:57,508 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2020-11-29 20:49:57,508 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2020-11-29 20:49:57,516 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-11-29 20:49:57,516 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-29 20:49:57,568 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_25d59393-1d33-44d5-adf9-76c5df7b4459/bin/uautomizer/witness.graphml [2020-11-29 20:49:57,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:49:57,569 INFO L168 Benchmark]: Toolchain (without parser) took 8353.18 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 81.8 MB in the beginning and 95.7 MB in the end (delta: -13.9 MB). Peak memory consumption was 39.9 MB. Max. memory is 16.1 GB. [2020-11-29 20:49:57,569 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 75.5 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 34.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:49:57,570 INFO L168 Benchmark]: CACSL2BoogieTranslator took 237.32 ms. Allocated memory is still 113.2 MB. Free memory was 81.5 MB in the beginning and 90.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:49:57,570 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.09 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:49:57,570 INFO L168 Benchmark]: Boogie Preprocessor took 36.56 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.5 MB in the end (delta: 520.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:49:57,571 INFO L168 Benchmark]: RCFGBuilder took 465.07 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 76.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 20:49:57,571 INFO L168 Benchmark]: TraceAbstraction took 7486.19 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 76.0 MB in the beginning and 98.8 MB in the end (delta: -22.9 MB). Peak memory consumption was 85.8 MB. Max. memory is 16.1 GB. [2020-11-29 20:49:57,572 INFO L168 Benchmark]: Witness Printer took 76.62 ms. Allocated memory is still 167.8 MB. Free memory was 98.8 MB in the beginning and 95.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:49:57,574 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 75.5 MB. Free memory was 34.0 MB in the beginning and 33.9 MB in the end (delta: 34.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 237.32 ms. Allocated memory is still 113.2 MB. Free memory was 81.5 MB in the beginning and 90.4 MB in the end (delta: -8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.09 ms. Allocated memory is still 113.2 MB. Free memory was 90.4 MB in the beginning and 89.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.56 ms. Allocated memory is still 113.2 MB. Free memory was 89.0 MB in the beginning and 88.5 MB in the end (delta: 520.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 465.07 ms. Allocated memory is still 113.2 MB. Free memory was 88.3 MB in the beginning and 76.4 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7486.19 ms. Allocated memory was 113.2 MB in the beginning and 167.8 MB in the end (delta: 54.5 MB). Free memory was 76.0 MB in the beginning and 98.8 MB in the end (delta: -22.9 MB). Peak memory consumption was 85.8 MB. Max. memory is 16.1 GB. * Witness Printer took 76.62 ms. Allocated memory is still 167.8 MB. Free memory was 98.8 MB in the beginning and 95.7 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: 6.6s, OverallIterations: 20, TraceHistogramMax: 12, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 762 SDtfs, 287 SDslu, 1938 SDs, 0 SdLazy, 734 SolverSat, 95 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 643 GetRequests, 521 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=155occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 93 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 238 PreInvPairs, 260 NumberOfFragments, 96 HoareAnnotationTreeSize, 238 FomulaSimplifications, 877 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 538 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 1095 NumberOfCodeBlocks, 1095 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 1069 ConstructedInterpolants, 0 QuantifiedInterpolants, 106561 SizeOfPredicates, 8 NumberOfNonLiveVariables, 820 ConjunctsInSsa, 37 ConjunctsInUnsatCore, 26 InterpolantComputations, 17 PerfectInterpolantSequences, 1337/1565 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...