./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 19:24:06,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:24:06,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:24:06,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:24:06,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:24:06,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:24:06,965 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:24:06,968 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:24:06,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:24:06,970 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:24:06,971 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:24:06,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:24:06,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:24:06,975 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:24:06,976 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:24:06,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:24:06,979 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:24:06,980 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:24:06,981 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:24:06,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:24:06,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:24:06,988 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:24:06,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:24:06,989 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:24:06,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:24:06,991 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:24:06,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:24:06,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:24:06,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:24:06,992 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:24:06,996 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:24:06,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:24:06,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:24:06,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:24:06,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:24:06,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:24:06,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:24:07,001 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:24:07,001 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:24:07,002 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:24:07,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:24:07,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-22 19:24:07,026 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:24:07,026 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:24:07,026 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:24:07,026 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:24:07,027 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:24:07,027 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:24:07,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:24:07,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:24:07,028 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:24:07,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:24:07,030 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:24:07,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:24:07,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:24:07,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:24:07,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:24:07,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:24:07,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:24:07,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:24:07,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:24:07,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:24:07,032 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:24:07,032 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c9c032ca120503dfa93615a57a0bb47775014248f579f3a3fd38a4985b2298b [2021-12-22 19:24:07,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:24:07,228 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:24:07,229 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:24:07,230 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:24:07,232 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:24:07,233 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-12-22 19:24:07,287 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e15828a/9ea97d49cc8e4551a9ce6aeeeae8872d/FLAGb2484733b [2021-12-22 19:24:07,649 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:24:07,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_1d.c [2021-12-22 19:24:07,660 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e15828a/9ea97d49cc8e4551a9ce6aeeeae8872d/FLAGb2484733b [2021-12-22 19:24:08,074 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53e15828a/9ea97d49cc8e4551a9ce6aeeeae8872d [2021-12-22 19:24:08,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:24:08,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:24:08,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:24:08,084 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:24:08,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:24:08,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,088 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dd83199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08, skipping insertion in model container [2021-12-22 19:24:08,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,092 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:24:08,101 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:24:08,212 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:24:08,214 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:24:08,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:24:08,232 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:24:08,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08 WrapperNode [2021-12-22 19:24:08,232 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:24:08,233 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:24:08,233 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:24:08,233 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:24:08,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,251 INFO L137 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 8 [2021-12-22 19:24:08,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:24:08,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:24:08,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:24:08,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:24:08,263 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,266 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,267 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:24:08,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:24:08,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:24:08,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:24:08,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (1/1) ... [2021-12-22 19:24:08,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:24:08,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:08,302 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:24:08,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:24:08,330 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2021-12-22 19:24:08,330 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2021-12-22 19:24:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2021-12-22 19:24:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2021-12-22 19:24:08,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:24:08,332 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:24:08,366 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:24:08,367 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:24:08,450 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:24:08,455 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:24:08,456 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 19:24:08,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:08 BoogieIcfgContainer [2021-12-22 19:24:08,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:24:08,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:24:08,458 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:24:08,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:24:08,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:08" (1/3) ... [2021-12-22 19:24:08,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152c010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:08, skipping insertion in model container [2021-12-22 19:24:08,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:08" (2/3) ... [2021-12-22 19:24:08,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152c010e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:08, skipping insertion in model container [2021-12-22 19:24:08,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:08" (3/3) ... [2021-12-22 19:24:08,465 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1d.c [2021-12-22 19:24:08,472 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:24:08,473 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-12-22 19:24:08,503 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:24:08,507 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:24:08,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-12-22 19:24:08,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-22 19:24:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-22 19:24:08,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:08,526 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:08,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1295673562, now seen corresponding path program 1 times [2021-12-22 19:24:08,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:08,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517647801] [2021-12-22 19:24:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:08,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:08,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:08,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:08,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517647801] [2021-12-22 19:24:08,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517647801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:08,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:08,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 19:24:08,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689945323] [2021-12-22 19:24:08,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:08,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 19:24:08,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:08,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 19:24:08,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 19:24:08,800 INFO L87 Difference]: Start difference. First operand has 45 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 36 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:24:08,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:08,986 INFO L93 Difference]: Finished difference Result 87 states and 103 transitions. [2021-12-22 19:24:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 19:24:08,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-22 19:24:08,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:08,996 INFO L225 Difference]: With dead ends: 87 [2021-12-22 19:24:08,997 INFO L226 Difference]: Without dead ends: 80 [2021-12-22 19:24:09,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-22 19:24:09,006 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 65 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 232 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-22 19:24:09,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 67. [2021-12-22 19:24:09,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 52 states have internal predecessors, (64), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 19:24:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 85 transitions. [2021-12-22 19:24:09,060 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 85 transitions. Word has length 9 [2021-12-22 19:24:09,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,060 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 85 transitions. [2021-12-22 19:24:09,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:24:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 85 transitions. [2021-12-22 19:24:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-22 19:24:09,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 19:24:09,065 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1511174720, now seen corresponding path program 1 times [2021-12-22 19:24:09,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901814032] [2021-12-22 19:24:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:09,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901814032] [2021-12-22 19:24:09,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901814032] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:09,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811406903] [2021-12-22 19:24:09,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:09,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:09,091 INFO L87 Difference]: Start difference. First operand 67 states and 85 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:24:09,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,116 INFO L93 Difference]: Finished difference Result 71 states and 95 transitions. [2021-12-22 19:24:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-22 19:24:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,118 INFO L225 Difference]: With dead ends: 71 [2021-12-22 19:24:09,118 INFO L226 Difference]: Without dead ends: 70 [2021-12-22 19:24:09,119 INFO L932 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 [2021-12-22 19:24:09,121 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 14 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 73 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-22 19:24:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-12-22 19:24:09,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.441860465116279) internal successors, (62), 51 states have internal predecessors, (62), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 19:24:09,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-12-22 19:24:09,138 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 10 [2021-12-22 19:24:09,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,138 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-12-22 19:24:09,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:24:09,139 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-12-22 19:24:09,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-22 19:24:09,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 19:24:09,141 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,145 INFO L85 PathProgramCache]: Analyzing trace with hash -540327935, now seen corresponding path program 1 times [2021-12-22 19:24:09,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637594515] [2021-12-22 19:24:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:09,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637594515] [2021-12-22 19:24:09,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637594515] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:09,171 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087552937] [2021-12-22 19:24:09,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:09,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:09,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:09,173 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,201 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2021-12-22 19:24:09,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-12-22 19:24:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,202 INFO L225 Difference]: With dead ends: 66 [2021-12-22 19:24:09,202 INFO L226 Difference]: Without dead ends: 65 [2021-12-22 19:24:09,203 INFO L932 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 [2021-12-22 19:24:09,203 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 75 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-22 19:24:09,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-12-22 19:24:09,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.3953488372093024) internal successors, (60), 50 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-22 19:24:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2021-12-22 19:24:09,210 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 12 [2021-12-22 19:24:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,210 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2021-12-22 19:24:09,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2021-12-22 19:24:09,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 19:24:09,211 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,211 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 19:24:09,211 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash 429703263, now seen corresponding path program 1 times [2021-12-22 19:24:09,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111777644] [2021-12-22 19:24:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:09,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111777644] [2021-12-22 19:24:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111777644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:24:09,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343396126] [2021-12-22 19:24:09,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:24:09,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:24:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:09,253 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,274 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2021-12-22 19:24:09,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:24:09,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-22 19:24:09,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,275 INFO L225 Difference]: With dead ends: 86 [2021-12-22 19:24:09,277 INFO L226 Difference]: Without dead ends: 85 [2021-12-22 19:24:09,277 INFO L932 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 [2021-12-22 19:24:09,278 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 121 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-22 19:24:09,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-12-22 19:24:09,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 58 states have internal predecessors, (68), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-22 19:24:09,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2021-12-22 19:24:09,296 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 13 [2021-12-22 19:24:09,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,297 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2021-12-22 19:24:09,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,297 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2021-12-22 19:24:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-22 19:24:09,298 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,298 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 19:24:09,298 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1511918191, now seen corresponding path program 1 times [2021-12-22 19:24:09,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381162301] [2021-12-22 19:24:09,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 19:24:09,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:09,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381162301] [2021-12-22 19:24:09,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381162301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:09,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804284212] [2021-12-22 19:24:09,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:09,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:09,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:09,328 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,339 INFO L93 Difference]: Finished difference Result 75 states and 97 transitions. [2021-12-22 19:24:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-12-22 19:24:09,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,345 INFO L225 Difference]: With dead ends: 75 [2021-12-22 19:24:09,345 INFO L226 Difference]: Without dead ends: 74 [2021-12-22 19:24:09,345 INFO L932 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 [2021-12-22 19:24:09,347 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 71 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-12-22 19:24:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-12-22 19:24:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 57 states have internal predecessors, (66), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (18), 12 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-22 19:24:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2021-12-22 19:24:09,359 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 17 [2021-12-22 19:24:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,359 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2021-12-22 19:24:09,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,360 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2021-12-22 19:24:09,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-22 19:24:09,360 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,360 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 19:24:09,361 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,361 INFO L85 PathProgramCache]: Analyzing trace with hash 375176379, now seen corresponding path program 1 times [2021-12-22 19:24:09,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221308707] [2021-12-22 19:24:09,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 19:24:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:09,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221308707] [2021-12-22 19:24:09,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221308707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:24:09,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528979039] [2021-12-22 19:24:09,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:24:09,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:24:09,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:09,394 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,406 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2021-12-22 19:24:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:24:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-22 19:24:09,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,407 INFO L225 Difference]: With dead ends: 95 [2021-12-22 19:24:09,407 INFO L226 Difference]: Without dead ends: 94 [2021-12-22 19:24:09,408 INFO L932 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 [2021-12-22 19:24:09,408 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 120 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-22 19:24:09,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2021-12-22 19:24:09,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (18), 14 states have call predecessors, (18), 10 states have call successors, (18) [2021-12-22 19:24:09,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2021-12-22 19:24:09,417 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 18 [2021-12-22 19:24:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,417 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2021-12-22 19:24:09,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2021-12-22 19:24:09,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:24:09,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,418 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 19:24:09,419 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,419 INFO L85 PathProgramCache]: Analyzing trace with hash 465426087, now seen corresponding path program 1 times [2021-12-22 19:24:09,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440885312] [2021-12-22 19:24:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:09,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440885312] [2021-12-22 19:24:09,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440885312] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:09,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983840808] [2021-12-22 19:24:09,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:24:09,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:24:09,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:24:09,468 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,517 INFO L93 Difference]: Finished difference Result 126 states and 160 transitions. [2021-12-22 19:24:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 19:24:09,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-22 19:24:09,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,518 INFO L225 Difference]: With dead ends: 126 [2021-12-22 19:24:09,518 INFO L226 Difference]: Without dead ends: 76 [2021-12-22 19:24:09,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:09,524 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 105 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-12-22 19:24:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2021-12-22 19:24:09,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 51 states have (on average 1.2941176470588236) internal successors, (66), 57 states have internal predecessors, (66), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-22 19:24:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2021-12-22 19:24:09,533 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 20 [2021-12-22 19:24:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,533 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2021-12-22 19:24:09,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,534 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2021-12-22 19:24:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 19:24:09,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,534 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 19:24:09,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,535 INFO L85 PathProgramCache]: Analyzing trace with hash -334519671, now seen corresponding path program 1 times [2021-12-22 19:24:09,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345496919] [2021-12-22 19:24:09,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 19:24:09,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:09,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345496919] [2021-12-22 19:24:09,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345496919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:09,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591680162] [2021-12-22 19:24:09,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:09,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:09,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:09,577 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,627 INFO L93 Difference]: Finished difference Result 150 states and 207 transitions. [2021-12-22 19:24:09,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 19:24:09,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-12-22 19:24:09,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,629 INFO L225 Difference]: With dead ends: 150 [2021-12-22 19:24:09,629 INFO L226 Difference]: Without dead ends: 92 [2021-12-22 19:24:09,630 INFO L932 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 [2021-12-22 19:24:09,631 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 10 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 191 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-22 19:24:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-12-22 19:24:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 62 states have internal predecessors, (69), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2021-12-22 19:24:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 100 transitions. [2021-12-22 19:24:09,644 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 100 transitions. Word has length 22 [2021-12-22 19:24:09,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,645 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 100 transitions. [2021-12-22 19:24:09,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 100 transitions. [2021-12-22 19:24:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 19:24:09,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,646 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 19:24:09,646 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,647 INFO L85 PathProgramCache]: Analyzing trace with hash 289256194, now seen corresponding path program 1 times [2021-12-22 19:24:09,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441901028] [2021-12-22 19:24:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 19:24:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,711 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 19:24:09,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441901028] [2021-12-22 19:24:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441901028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087878791] [2021-12-22 19:24:09,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:09,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:09,714 INFO L87 Difference]: Start difference. First operand 80 states and 100 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 19:24:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,760 INFO L93 Difference]: Finished difference Result 159 states and 211 transitions. [2021-12-22 19:24:09,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 19:24:09,761 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-12-22 19:24:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,763 INFO L225 Difference]: With dead ends: 159 [2021-12-22 19:24:09,763 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 19:24:09,765 INFO L932 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 [2021-12-22 19:24:09,766 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 198 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 19:24:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-12-22 19:24:09,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.2542372881355932) internal successors, (74), 67 states have internal predecessors, (74), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 19:24:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2021-12-22 19:24:09,774 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 28 [2021-12-22 19:24:09,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,774 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2021-12-22 19:24:09,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-22 19:24:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2021-12-22 19:24:09,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-22 19:24:09,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,775 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 19:24:09,775 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1526545827, now seen corresponding path program 1 times [2021-12-22 19:24:09,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748645784] [2021-12-22 19:24:09,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,776 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 19:24:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:09,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 19:24:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 19:24:09,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748645784] [2021-12-22 19:24:09,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748645784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:24:09,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863353578] [2021-12-22 19:24:09,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:24:09,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:24:09,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:09,819 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 19:24:09,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,831 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2021-12-22 19:24:09,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:24:09,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 31 [2021-12-22 19:24:09,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,833 INFO L225 Difference]: With dead ends: 95 [2021-12-22 19:24:09,833 INFO L226 Difference]: Without dead ends: 94 [2021-12-22 19:24:09,833 INFO L932 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 [2021-12-22 19:24:09,834 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-22 19:24:09,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2021-12-22 19:24:09,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 69 states have internal predecessors, (78), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 19:24:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2021-12-22 19:24:09,848 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 31 [2021-12-22 19:24:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,848 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2021-12-22 19:24:09,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 19:24:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2021-12-22 19:24:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 19:24:09,849 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,850 INFO L514 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] [2021-12-22 19:24:09,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 19:24:09,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1525554823, now seen corresponding path program 1 times [2021-12-22 19:24:09,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462901763] [2021-12-22 19:24:09,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 19:24:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 19:24:09,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-22 19:24:09,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,877 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-22 19:24:09,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462901763] [2021-12-22 19:24:09,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462901763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:09,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584159928] [2021-12-22 19:24:09,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:09,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:09,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:09,888 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 19:24:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:09,898 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2021-12-22 19:24:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:09,899 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2021-12-22 19:24:09,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:09,899 INFO L225 Difference]: With dead ends: 92 [2021-12-22 19:24:09,901 INFO L226 Difference]: Without dead ends: 91 [2021-12-22 19:24:09,901 INFO L932 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 [2021-12-22 19:24:09,901 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:09,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 77 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-22 19:24:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-22 19:24:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 68 states have internal predecessors, (76), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 19:24:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2021-12-22 19:24:09,915 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 37 [2021-12-22 19:24:09,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:09,916 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2021-12-22 19:24:09,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-22 19:24:09,916 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2021-12-22 19:24:09,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-22 19:24:09,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:09,918 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:09,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 19:24:09,918 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:09,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1908591901, now seen corresponding path program 1 times [2021-12-22 19:24:09,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:09,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634543253] [2021-12-22 19:24:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:09,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:09,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 19:24:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:09,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:09,982 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 19:24:09,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:09,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634543253] [2021-12-22 19:24:09,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634543253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:09,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:09,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:09,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568502983] [2021-12-22 19:24:09,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:09,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:09,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:09,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:09,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:09,984 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:10,019 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2021-12-22 19:24:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 19:24:10,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-12-22 19:24:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:10,022 INFO L225 Difference]: With dead ends: 101 [2021-12-22 19:24:10,022 INFO L226 Difference]: Without dead ends: 100 [2021-12-22 19:24:10,022 INFO L932 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 [2021-12-22 19:24:10,023 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:10,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 169 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-12-22 19:24:10,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-12-22 19:24:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 63 states have (on average 1.1746031746031746) internal successors, (74), 67 states have internal predecessors, (74), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 19:24:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2021-12-22 19:24:10,035 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 47 [2021-12-22 19:24:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:10,037 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2021-12-22 19:24:10,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2021-12-22 19:24:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-22 19:24:10,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,040 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:10,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 19:24:10,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:10,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1338149547, now seen corresponding path program 1 times [2021-12-22 19:24:10,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:10,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102863239] [2021-12-22 19:24:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:10,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:10,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 19:24:10,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:10,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102863239] [2021-12-22 19:24:10,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102863239] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:10,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:10,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:10,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058079543] [2021-12-22 19:24:10,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:10,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:10,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:10,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:10,132 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:10,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:10,152 INFO L93 Difference]: Finished difference Result 90 states and 109 transitions. [2021-12-22 19:24:10,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:24:10,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2021-12-22 19:24:10,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:10,153 INFO L225 Difference]: With dead ends: 90 [2021-12-22 19:24:10,154 INFO L226 Difference]: Without dead ends: 89 [2021-12-22 19:24:10,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:10,156 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:10,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 171 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:10,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-22 19:24:10,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-12-22 19:24:10,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 66 states have internal predecessors, (72), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2021-12-22 19:24:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 107 transitions. [2021-12-22 19:24:10,163 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 107 transitions. Word has length 37 [2021-12-22 19:24:10,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:10,163 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 107 transitions. [2021-12-22 19:24:10,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:10,165 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 107 transitions. [2021-12-22 19:24:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-22 19:24:10,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,166 INFO L514 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] [2021-12-22 19:24:10,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 19:24:10,166 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:10,166 INFO L85 PathProgramCache]: Analyzing trace with hash 189968875, now seen corresponding path program 1 times [2021-12-22 19:24:10,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:10,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10913568] [2021-12-22 19:24:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-22 19:24:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:10,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:10,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 19:24:10,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:10,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10913568] [2021-12-22 19:24:10,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10913568] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947553142] [2021-12-22 19:24:10,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:10,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:10,251 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:24:10,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:24:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 19:24:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 19:24:10,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 27 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-22 19:24:10,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947553142] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:10,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:10,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 19:24:10,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909977290] [2021-12-22 19:24:10,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:10,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 19:24:10,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 19:24:10,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:24:10,622 INFO L87 Difference]: Start difference. First operand 89 states and 107 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 19:24:10,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:10,841 INFO L93 Difference]: Finished difference Result 200 states and 246 transitions. [2021-12-22 19:24:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 19:24:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) Word has length 51 [2021-12-22 19:24:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:10,842 INFO L225 Difference]: With dead ends: 200 [2021-12-22 19:24:10,842 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 19:24:10,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-12-22 19:24:10,843 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 29 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:10,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 276 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 19:24:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2021-12-22 19:24:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 73 states have (on average 1.095890410958904) internal successors, (80), 75 states have internal predecessors, (80), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-22 19:24:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-12-22 19:24:10,854 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 51 [2021-12-22 19:24:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:10,854 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-12-22 19:24:10,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-22 19:24:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-12-22 19:24:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 19:24:10,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,855 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:10,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:11,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-22 19:24:11,056 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:11,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,056 INFO L85 PathProgramCache]: Analyzing trace with hash 641343195, now seen corresponding path program 1 times [2021-12-22 19:24:11,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489886107] [2021-12-22 19:24:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:11,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 19:24:11,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489886107] [2021-12-22 19:24:11,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489886107] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:11,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893387811] [2021-12-22 19:24:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:11,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:11,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:24:11,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:24:11,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 19:24:11,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 19:24:11,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 19:24:11,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893387811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:11,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:11,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2021-12-22 19:24:11,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948006394] [2021-12-22 19:24:11,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 19:24:11,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 19:24:11,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 19:24:11,334 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,360 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2021-12-22 19:24:11,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-22 19:24:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-12-22 19:24:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,362 INFO L225 Difference]: With dead ends: 119 [2021-12-22 19:24:11,362 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 19:24:11,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 19:24:11,363 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 160 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 19:24:11,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-22 19:24:11,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 19:24:11,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-12-22 19:24:11,367 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 44 [2021-12-22 19:24:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,367 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-12-22 19:24:11,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-22 19:24:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-12-22 19:24:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-22 19:24:11,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:11,368 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:11,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 19:24:11,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:11,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,585 INFO L85 PathProgramCache]: Analyzing trace with hash 640030532, now seen corresponding path program 1 times [2021-12-22 19:24:11,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261526884] [2021-12-22 19:24:11,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 19:24:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 19:24:11,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:11,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261526884] [2021-12-22 19:24:11,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261526884] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:11,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:11,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:11,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082718379] [2021-12-22 19:24:11,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:11,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:11,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:11,623 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 19:24:11,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,629 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2021-12-22 19:24:11,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:11,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-12-22 19:24:11,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,631 INFO L225 Difference]: With dead ends: 59 [2021-12-22 19:24:11,631 INFO L226 Difference]: Without dead ends: 58 [2021-12-22 19:24:11,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:11,632 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 67 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:11,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-22 19:24:11,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-12-22 19:24:11,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-22 19:24:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2021-12-22 19:24:11,636 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 44 [2021-12-22 19:24:11,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,636 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2021-12-22 19:24:11,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 19:24:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2021-12-22 19:24:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-22 19:24:11,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:11,637 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 19:24:11,637 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2021-12-22 19:24:11,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1633889918, now seen corresponding path program 1 times [2021-12-22 19:24:11,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516373046] [2021-12-22 19:24:11,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-22 19:24:11,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 19:24:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 19:24:11,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-22 19:24:11,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-22 19:24:11,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-22 19:24:11,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:11,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516373046] [2021-12-22 19:24:11,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516373046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:11,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:11,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:24:11,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725962052] [2021-12-22 19:24:11,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:24:11,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:24:11,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:11,678 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 19:24:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,683 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-12-22 19:24:11,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:24:11,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2021-12-22 19:24:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,684 INFO L225 Difference]: With dead ends: 58 [2021-12-22 19:24:11,684 INFO L226 Difference]: Without dead ends: 0 [2021-12-22 19:24:11,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:11,685 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 96 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:11,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-22 19:24:11,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-22 19:24:11,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 19:24:11,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-22 19:24:11,687 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2021-12-22 19:24:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,687 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-22 19:24:11,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-22 19:24:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-22 19:24:11,687 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-22 19:24:11,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2021-12-22 19:24:11,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2021-12-22 19:24:11,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2021-12-22 19:24:11,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2021-12-22 19:24:11,690 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2021-12-22 19:24:11,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2021-12-22 19:24:11,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2021-12-22 19:24:11,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2021-12-22 19:24:11,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2021-12-22 19:24:11,691 INFO L764 garLoopResultBuilder]: Registering result SAFE for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2021-12-22 19:24:11,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 19:24:11,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-22 19:24:11,865 INFO L858 garLoopResultBuilder]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,865 INFO L858 garLoopResultBuilder]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2021-12-22 19:24:11,865 INFO L858 garLoopResultBuilder]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,866 INFO L858 garLoopResultBuilder]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2021-12-22 19:24:11,866 INFO L858 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,866 INFO L861 garLoopResultBuilder]: At program point rec1ENTRY(lines 11 15) the Hoare annotation is: true [2021-12-22 19:24:11,866 INFO L858 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,866 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2021-12-22 19:24:11,866 INFO L854 garLoopResultBuilder]: At program point L14-2(line 14) the Hoare annotation is: (or (not (<= |rec1_#in~i| 2147483647)) (and (= |rec1_#in~i| rec1_~i) (<= 1 rec1_~i))) [2021-12-22 19:24:11,866 INFO L858 garLoopResultBuilder]: For program point L14-3(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L854 garLoopResultBuilder]: At program point L14-6(line 14) the Hoare annotation is: (or (and (= |rec1_#in~i| rec1_~i) (<= |rec1_#t~ret0| 1) (<= 1 rec1_~i)) (not (<= |rec1_#in~i| 2147483647))) [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point L14-7(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,867 INFO L858 garLoopResultBuilder]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L854 garLoopResultBuilder]: At program point L14-8(line 14) the Hoare annotation is: (and (not (<= |rec1_#in~i| 0)) (or (and (<= |rec1_#t~ret1| 0) (= |rec1_#in~i| rec1_~i) (<= |rec1_#t~ret0| 1)) (not (<= |rec1_#in~i| 2147483647)))) [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point L14-9(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point L14-10(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point L14-11(line 14) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L858 garLoopResultBuilder]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2021-12-22 19:24:11,868 INFO L854 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (and (not (<= |rec2_#in~j| 0)) (or (not (<= |rec2_#in~j| 2147483647)) (and (<= 1 rec2_~j) (<= rec2_~j 2147483647)))) [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-2(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L854 garLoopResultBuilder]: At program point L20-4(line 20) the Hoare annotation is: (and (or (not (<= |rec2_#in~j| 2147483647)) (and (<= |rec2_#t~ret3| 1) (<= 1 |rec2_#t~ret3|) (<= 1 rec2_~j) (<= rec2_~j 2147483647))) (not (<= |rec2_#in~j| 0))) [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-5(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-6(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L858 garLoopResultBuilder]: For program point L20-7(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,869 INFO L861 garLoopResultBuilder]: At program point rec2ENTRY(lines 17 21) the Hoare annotation is: true [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-12-22 19:24:11,870 INFO L854 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 2147483647) [2021-12-22 19:24:11,870 INFO L858 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-12-22 19:24:11,871 INFO L858 garLoopResultBuilder]: For program point L23(lines 23 26) no Hoare annotation was computed. [2021-12-22 19:24:11,873 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,874 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-22 19:24:11,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 07:24:11 BoogieIcfgContainer [2021-12-22 19:24:11,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-22 19:24:11,877 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-22 19:24:11,877 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-22 19:24:11,877 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-22 19:24:11,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:08" (3/4) ... [2021-12-22 19:24:11,879 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-12-22 19:24:11,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2021-12-22 19:24:11,888 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2021-12-22 19:24:11,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-12-22 19:24:11,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-12-22 19:24:11,891 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-12-22 19:24:11,914 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-22 19:24:11,914 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-22 19:24:11,915 INFO L158 Benchmark]: Toolchain (without parser) took 3838.16ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 55.5MB in the beginning and 104.1MB in the end (delta: -48.6MB). Peak memory consumption was 52.4MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,916 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.5MB in the end (delta: 34.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:24:11,916 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.35ms. Allocated memory is still 88.1MB. Free memory was 55.4MB in the beginning and 65.4MB in the end (delta: -10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,916 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.73ms. Allocated memory is still 88.1MB. Free memory was 65.4MB in the beginning and 64.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-22 19:24:11,916 INFO L158 Benchmark]: Boogie Preprocessor took 15.74ms. Allocated memory is still 88.1MB. Free memory was 64.2MB in the beginning and 63.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,916 INFO L158 Benchmark]: RCFGBuilder took 188.40ms. Allocated memory is still 88.1MB. Free memory was 63.1MB in the beginning and 53.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,917 INFO L158 Benchmark]: TraceAbstraction took 3418.39ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 53.0MB in the beginning and 46.1MB in the end (delta: 6.9MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,917 INFO L158 Benchmark]: Witness Printer took 37.69ms. Allocated memory is still 130.0MB. Free memory was 46.1MB in the beginning and 104.1MB in the end (delta: -58.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-22 19:24:11,918 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 88.1MB. Free memory was 44.5MB in the beginning and 44.5MB in the end (delta: 34.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.35ms. Allocated memory is still 88.1MB. Free memory was 55.4MB in the beginning and 65.4MB in the end (delta: -10.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.73ms. Allocated memory is still 88.1MB. Free memory was 65.4MB in the beginning and 64.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 15.74ms. Allocated memory is still 88.1MB. Free memory was 64.2MB in the beginning and 63.1MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 188.40ms. Allocated memory is still 88.1MB. Free memory was 63.1MB in the beginning and 53.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3418.39ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 53.0MB in the beginning and 46.1MB in the end (delta: 6.9MB). Peak memory consumption was 49.1MB. Max. memory is 16.1GB. * Witness Printer took 37.69ms. Allocated memory is still 130.0MB. Free memory was 46.1MB in the beginning and 104.1MB in the end (delta: -58.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 45 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 17, TraceHistogramMax: 7, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 235 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 205 mSDsluCounter, 2317 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1647 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 553 IncrementalHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 670 mSDtfsCounter, 553 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 357 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 101 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 194 PreInvPairs, 201 NumberOfFragments, 92 HoareAnnotationTreeSize, 194 FomulaSimplifications, 52 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 613 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 580 NumberOfCodeBlocks, 580 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 972 SizeOfPredicates, 2 NumberOfNonLiveVariables, 193 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 21 InterpolantComputations, 15 PerfectInterpolantSequences, 514/526 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 - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-12-22 19:24:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE