./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version f4b24e32 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_2b.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 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 13:39:34,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 13:39:34,091 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 13:39:34,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 13:39:34,125 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 13:39:34,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 13:39:34,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 13:39:34,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 13:39:34,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 13:39:34,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 13:39:34,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 13:39:34,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 13:39:34,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 13:39:34,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 13:39:34,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 13:39:34,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 13:39:34,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 13:39:34,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 13:39:34,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 13:39:34,147 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 13:39:34,148 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 13:39:34,149 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 13:39:34,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 13:39:34,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 13:39:34,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 13:39:34,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 13:39:34,157 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 13:39:34,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 13:39:34,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 13:39:34,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 13:39:34,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 13:39:34,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 13:39:34,160 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 13:39:34,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 13:39:34,161 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 13:39:34,162 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 13:39:34,162 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 13:39:34,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 13:39:34,163 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 13:39:34,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 13:39:34,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 13:39:34,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 13:39:34,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-14 13:39:34,187 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 13:39:34,187 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 13:39:34,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 13:39:34,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 13:39:34,188 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 13:39:34,188 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 13:39:34,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 13:39:34,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 13:39:34,189 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 13:39:34,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 13:39:34,190 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 13:39:34,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 13:39:34,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 13:39:34,190 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-14 13:39:34,190 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 13:39:34,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-14 13:39:34,191 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-14 13:39:34,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-14 13:39:34,192 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 13:39:34,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-14 13:39:34,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 13:39:34,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 13:39:34,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 13:39:34,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:39:34,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 13:39:34,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 13:39:34,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-14 13:39:34,193 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 13:39:34,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 13:39:34,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-14 13:39:34,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2022-07-14 13:39:34,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 13:39:34,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 13:39:34,382 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 13:39:34,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 13:39:34,383 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 13:39:34,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2022-07-14 13:39:34,452 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b314883/bca43409cb8b4518bd4e95cbc7e0bea5/FLAG2af76f993 [2022-07-14 13:39:34,731 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 13:39:34,732 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2022-07-14 13:39:34,736 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b314883/bca43409cb8b4518bd4e95cbc7e0bea5/FLAG2af76f993 [2022-07-14 13:39:35,177 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17b314883/bca43409cb8b4518bd4e95cbc7e0bea5 [2022-07-14 13:39:35,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 13:39:35,182 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 13:39:35,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 13:39:35,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 13:39:35,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 13:39:35,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dc76c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35, skipping insertion in model container [2022-07-14 13:39:35,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 13:39:35,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 13:39:35,339 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:39:35,349 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 13:39:35,358 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 13:39:35,364 INFO L208 MainTranslator]: Completed translation [2022-07-14 13:39:35,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35 WrapperNode [2022-07-14 13:39:35,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 13:39:35,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 13:39:35,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 13:39:35,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 13:39:35,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,382 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2022-07-14 13:39:35,382 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 13:39:35,383 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 13:39:35,383 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 13:39:35,383 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 13:39:35,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,391 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 13:39:35,394 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 13:39:35,394 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 13:39:35,394 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 13:39:35,395 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (1/1) ... [2022-07-14 13:39:35,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 13:39:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:35,416 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) [2022-07-14 13:39:35,430 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 [2022-07-14 13:39:35,451 INFO L130 BoogieDeclarations]: Found specification of procedure g [2022-07-14 13:39:35,452 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2022-07-14 13:39:35,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 13:39:35,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 13:39:35,493 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 13:39:35,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 13:39:35,564 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 13:39:35,569 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 13:39:35,569 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-14 13:39:35,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:39:35 BoogieIcfgContainer [2022-07-14 13:39:35,571 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 13:39:35,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 13:39:35,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 13:39:35,574 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 13:39:35,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 01:39:35" (1/3) ... [2022-07-14 13:39:35,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dafbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:39:35, skipping insertion in model container [2022-07-14 13:39:35,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 01:39:35" (2/3) ... [2022-07-14 13:39:35,575 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42dafbe6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 01:39:35, skipping insertion in model container [2022-07-14 13:39:35,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 01:39:35" (3/3) ... [2022-07-14 13:39:35,576 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2022-07-14 13:39:35,585 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 13:39:35,585 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-14 13:39:35,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 13:39:35,616 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7bfd54bd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c119543 [2022-07-14 13:39:35,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-14 13:39:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-14 13:39:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 13:39:35,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:35,624 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:35,624 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:35,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:35,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2022-07-14 13:39:35,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:35,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514501261] [2022-07-14 13:39:35,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:35,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:35,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514501261] [2022-07-14 13:39:35,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514501261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:35,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:35,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:39:35,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676165156] [2022-07-14 13:39:35,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:35,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:39:35,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:35,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:39:35,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:39:35,789 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:35,851 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2022-07-14 13:39:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:39:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 13:39:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:35,859 INFO L225 Difference]: With dead ends: 42 [2022-07-14 13:39:35,859 INFO L226 Difference]: Without dead ends: 37 [2022-07-14 13:39:35,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:39:35,863 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 29 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:35,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 61 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:39:35,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-14 13:39:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-07-14 13:39:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 13:39:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-07-14 13:39:35,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2022-07-14 13:39:35,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:35,898 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-07-14 13:39:35,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:35,899 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-07-14 13:39:35,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-14 13:39:35,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:35,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:35,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 13:39:35,901 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2022-07-14 13:39:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:35,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295417572] [2022-07-14 13:39:35,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:35,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295417572] [2022-07-14 13:39:35,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295417572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:35,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:35,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 13:39:35,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673242389] [2022-07-14 13:39:35,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:35,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 13:39:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 13:39:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 13:39:35,960 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:36,046 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-07-14 13:39:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 13:39:36,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-14 13:39:36,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:36,047 INFO L225 Difference]: With dead ends: 51 [2022-07-14 13:39:36,047 INFO L226 Difference]: Without dead ends: 47 [2022-07-14 13:39:36,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:39:36,049 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:36,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-14 13:39:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-07-14 13:39:36,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-14 13:39:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-07-14 13:39:36,057 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2022-07-14 13:39:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:36,058 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-07-14 13:39:36,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-07-14 13:39:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 13:39:36,060 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:36,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:36,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 13:39:36,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:36,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:36,063 INFO L85 PathProgramCache]: Analyzing trace with hash 496687761, now seen corresponding path program 1 times [2022-07-14 13:39:36,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:36,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426036928] [2022-07-14 13:39:36,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:36,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:36,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426036928] [2022-07-14 13:39:36,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426036928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:36,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832468700] [2022-07-14 13:39:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:36,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:36,127 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) [2022-07-14 13:39:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-14 13:39:36,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:36,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 13:39:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:36,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:36,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:36,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832468700] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:36,283 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:36,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-14 13:39:36,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148699637] [2022-07-14 13:39:36,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:36,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-14 13:39:36,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:36,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-14 13:39:36,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-14 13:39:36,285 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:36,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:36,424 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2022-07-14 13:39:36,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 13:39:36,425 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-14 13:39:36,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:36,426 INFO L225 Difference]: With dead ends: 96 [2022-07-14 13:39:36,426 INFO L226 Difference]: Without dead ends: 95 [2022-07-14 13:39:36,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2022-07-14 13:39:36,428 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:36,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 107 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:36,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-14 13:39:36,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2022-07-14 13:39:36,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 59 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-14 13:39:36,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2022-07-14 13:39:36,439 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 13 [2022-07-14 13:39:36,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:36,439 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2022-07-14 13:39:36,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:36,440 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2022-07-14 13:39:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-14 13:39:36,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:36,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:36,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:36,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:36,656 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:36,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:36,657 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2022-07-14 13:39:36,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:36,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915754316] [2022-07-14 13:39:36,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:36,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:36,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:36,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915754316] [2022-07-14 13:39:36,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915754316] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:36,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:36,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 13:39:36,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449429367] [2022-07-14 13:39:36,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:36,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 13:39:36,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:36,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 13:39:36,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 13:39:36,713 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-14 13:39:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:36,741 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2022-07-14 13:39:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 13:39:36,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2022-07-14 13:39:36,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:36,744 INFO L225 Difference]: With dead ends: 117 [2022-07-14 13:39:36,744 INFO L226 Difference]: Without dead ends: 116 [2022-07-14 13:39:36,744 INFO L412 NwaCegarLoop]: 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 [2022-07-14 13:39:36,745 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:36,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 47 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:39:36,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-14 13:39:36,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2022-07-14 13:39:36,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 75 states have internal predecessors, (92), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2022-07-14 13:39:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2022-07-14 13:39:36,757 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 15 [2022-07-14 13:39:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:36,758 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2022-07-14 13:39:36,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-07-14 13:39:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2022-07-14 13:39:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 13:39:36,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:36,759 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:36,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 13:39:36,759 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:36,759 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2022-07-14 13:39:36,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:36,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352795421] [2022-07-14 13:39:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:36,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:36,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352795421] [2022-07-14 13:39:36,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352795421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:36,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:36,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 13:39:36,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637470819] [2022-07-14 13:39:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:36,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 13:39:36,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:36,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 13:39:36,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 13:39:36,779 INFO L87 Difference]: Start difference. First operand 99 states and 127 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, (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) [2022-07-14 13:39:36,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:36,786 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2022-07-14 13:39:36,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 13:39:36,787 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, (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 16 [2022-07-14 13:39:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:36,788 INFO L225 Difference]: With dead ends: 99 [2022-07-14 13:39:36,788 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 13:39:36,788 INFO L412 NwaCegarLoop]: 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 [2022-07-14 13:39:36,789 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 32 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 [2022-07-14 13:39:36,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:39:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 13:39:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-14 13:39:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 74 states have internal predecessors, (86), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2022-07-14 13:39:36,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2022-07-14 13:39:36,815 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 16 [2022-07-14 13:39:36,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:36,815 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2022-07-14 13:39:36,816 INFO L496 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, (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) [2022-07-14 13:39:36,817 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2022-07-14 13:39:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 13:39:36,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:36,818 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:36,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 13:39:36,818 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:36,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2022-07-14 13:39:36,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:36,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022939954] [2022-07-14 13:39:36,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:36,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:36,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022939954] [2022-07-14 13:39:36,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022939954] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:36,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:36,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:39:36,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310090547] [2022-07-14 13:39:36,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:36,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:39:36,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:36,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:39:36,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:39:36,877 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 13:39:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:36,960 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2022-07-14 13:39:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 13:39:36,961 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 20 [2022-07-14 13:39:36,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:36,962 INFO L225 Difference]: With dead ends: 137 [2022-07-14 13:39:36,962 INFO L226 Difference]: Without dead ends: 136 [2022-07-14 13:39:36,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-14 13:39:36,963 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 31 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:36,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:36,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-14 13:39:36,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2022-07-14 13:39:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 100 states have internal predecessors, (108), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2022-07-14 13:39:36,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-07-14 13:39:36,975 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 20 [2022-07-14 13:39:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:36,975 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-07-14 13:39:36,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 13:39:36,976 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-07-14 13:39:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 13:39:36,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:36,976 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:36,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 13:39:36,977 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:36,977 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2022-07-14 13:39:36,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:36,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669441659] [2022-07-14 13:39:36,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:36,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:36,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:36,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:37,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:37,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669441659] [2022-07-14 13:39:37,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669441659] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 13:39:37,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 13:39:37,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 13:39:37,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224479584] [2022-07-14 13:39:37,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 13:39:37,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 13:39:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:37,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 13:39:37,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 13:39:37,010 INFO L87 Difference]: Start difference. First operand 128 states and 168 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 13:39:37,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:37,053 INFO L93 Difference]: Finished difference Result 149 states and 199 transitions. [2022-07-14 13:39:37,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 13:39:37,054 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, (3), 2 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 21 [2022-07-14 13:39:37,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:37,054 INFO L225 Difference]: With dead ends: 149 [2022-07-14 13:39:37,055 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 13:39:37,056 INFO L412 NwaCegarLoop]: 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 [2022-07-14 13:39:37,056 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:37,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 55 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:39:37,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 13:39:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2022-07-14 13:39:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 13:39:37,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-07-14 13:39:37,062 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2022-07-14 13:39:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:37,062 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-07-14 13:39:37,062 INFO L496 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-14 13:39:37,062 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-07-14 13:39:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-14 13:39:37,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:37,063 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:37,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 13:39:37,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1579949547, now seen corresponding path program 2 times [2022-07-14 13:39:37,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:37,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318404546] [2022-07-14 13:39:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:37,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:37,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:37,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:37,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318404546] [2022-07-14 13:39:37,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318404546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:37,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508120654] [2022-07-14 13:39:37,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:39:37,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:37,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:37,122 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) [2022-07-14 13:39:37,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 13:39:37,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:39:37,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:37,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-14 13:39:37,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:37,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:37,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508120654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:37,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:37,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-14 13:39:37,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792355678] [2022-07-14 13:39:37,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:37,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 13:39:37,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:37,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 13:39:37,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-07-14 13:39:37,252 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:39:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:37,442 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-14 13:39:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 13:39:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-07-14 13:39:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:37,443 INFO L225 Difference]: With dead ends: 93 [2022-07-14 13:39:37,444 INFO L226 Difference]: Without dead ends: 77 [2022-07-14 13:39:37,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2022-07-14 13:39:37,445 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:37,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 78 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-14 13:39:37,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2022-07-14 13:39:37,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-14 13:39:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-07-14 13:39:37,452 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 26 [2022-07-14 13:39:37,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:37,453 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-07-14 13:39:37,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:39:37,453 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-07-14 13:39:37,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-14 13:39:37,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:37,457 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2022-07-14 13:39:37,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:37,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-14 13:39:37,672 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:37,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1990306702, now seen corresponding path program 2 times [2022-07-14 13:39:37,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:37,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029868713] [2022-07-14 13:39:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:37,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:37,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029868713] [2022-07-14 13:39:37,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029868713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:37,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341325532] [2022-07-14 13:39:37,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 13:39:37,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:37,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:37,778 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:39:37,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 13:39:37,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 13:39:37,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:37,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 13:39:37,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:37,836 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:37,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:37,974 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:37,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341325532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:37,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:37,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-14 13:39:37,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610514198] [2022-07-14 13:39:37,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:37,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-14 13:39:37,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:37,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-14 13:39:37,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2022-07-14 13:39:37,976 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:38,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:38,311 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2022-07-14 13:39:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 13:39:38,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-14 13:39:38,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:38,313 INFO L225 Difference]: With dead ends: 148 [2022-07-14 13:39:38,313 INFO L226 Difference]: Without dead ends: 147 [2022-07-14 13:39:38,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 13:39:38,314 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 312 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:38,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 107 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-07-14 13:39:38,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2022-07-14 13:39:38,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 75 states have internal predecessors, (77), 13 states have call successors, (13), 13 states have call predecessors, (13), 10 states have return successors, (10), 1 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-14 13:39:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-07-14 13:39:38,320 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 28 [2022-07-14 13:39:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:38,321 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-07-14 13:39:38,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-07-14 13:39:38,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-14 13:39:38,321 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:38,321 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 13:39:38,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:38,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:38,527 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:38,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:38,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1862709720, now seen corresponding path program 3 times [2022-07-14 13:39:38,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:38,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116265133] [2022-07-14 13:39:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:38,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:38,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-14 13:39:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:38,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116265133] [2022-07-14 13:39:38,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116265133] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:38,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818115770] [2022-07-14 13:39:38,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:39:38,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:38,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:38,723 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:39:38,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 13:39:38,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:38,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 13:39:38,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-14 13:39:38,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:38,846 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:38,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-14 13:39:39,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818115770] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:39,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:39,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-14 13:39:39,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313922598] [2022-07-14 13:39:39,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:39,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 13:39:39,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 13:39:39,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2022-07-14 13:39:39,024 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:39:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:39,168 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2022-07-14 13:39:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 13:39:39,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-07-14 13:39:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:39,170 INFO L225 Difference]: With dead ends: 122 [2022-07-14 13:39:39,170 INFO L226 Difference]: Without dead ends: 59 [2022-07-14 13:39:39,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 13:39:39,171 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:39,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 73 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 13:39:39,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-14 13:39:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-14 13:39:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:39,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-07-14 13:39:39,175 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 41 [2022-07-14 13:39:39,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:39,175 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-07-14 13:39:39,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-14 13:39:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-07-14 13:39:39,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-14 13:39:39,176 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:39,177 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-07-14 13:39:39,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:39,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:39,393 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:39,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:39,394 INFO L85 PathProgramCache]: Analyzing trace with hash 235894418, now seen corresponding path program 3 times [2022-07-14 13:39:39,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:39,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700541204] [2022-07-14 13:39:39,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:39,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:39,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700541204] [2022-07-14 13:39:39,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700541204] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:39,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787969807] [2022-07-14 13:39:39,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 13:39:39,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:39,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:39,675 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:39:39,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 13:39:39,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-14 13:39:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:39,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-14 13:39:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:39,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:40,217 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:40,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787969807] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:40,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:40,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2022-07-14 13:39:40,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911523276] [2022-07-14 13:39:40,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:40,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 13:39:40,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 13:39:40,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2022-07-14 13:39:40,219 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:40,620 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-07-14 13:39:40,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-14 13:39:40,620 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-07-14 13:39:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:40,621 INFO L225 Difference]: With dead ends: 121 [2022-07-14 13:39:40,621 INFO L226 Difference]: Without dead ends: 120 [2022-07-14 13:39:40,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2022-07-14 13:39:40,623 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:40,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 42 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 13:39:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-14 13:39:40,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-07-14 13:39:40,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-07-14 13:39:40,630 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 58 [2022-07-14 13:39:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:40,630 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-07-14 13:39:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:40,631 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-07-14 13:39:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-14 13:39:40,633 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:40,633 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2022-07-14 13:39:40,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:40,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-14 13:39:40,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash -102214958, now seen corresponding path program 4 times [2022-07-14 13:39:40,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:40,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9274461] [2022-07-14 13:39:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:40,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:41,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9274461] [2022-07-14 13:39:41,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9274461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:41,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586809746] [2022-07-14 13:39:41,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 13:39:41,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:41,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:41,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:39:41,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 13:39:41,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 13:39:41,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:41,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-14 13:39:41,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:41,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:43,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586809746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:43,252 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:43,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2022-07-14 13:39:43,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903570654] [2022-07-14 13:39:43,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-14 13:39:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:43,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-14 13:39:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2022-07-14 13:39:43,256 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:44,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:44,594 INFO L93 Difference]: Finished difference Result 241 states and 264 transitions. [2022-07-14 13:39:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-07-14 13:39:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2022-07-14 13:39:44,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:44,595 INFO L225 Difference]: With dead ends: 241 [2022-07-14 13:39:44,595 INFO L226 Difference]: Without dead ends: 240 [2022-07-14 13:39:44,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5549, Invalid=14473, Unknown=0, NotChecked=0, Total=20022 [2022-07-14 13:39:44,600 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 793 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:44,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [793 Valid, 42 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 13:39:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-14 13:39:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-07-14 13:39:44,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:44,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2022-07-14 13:39:44,611 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 118 [2022-07-14 13:39:44,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:44,611 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2022-07-14 13:39:44,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:44,612 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2022-07-14 13:39:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-07-14 13:39:44,614 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:44,614 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2022-07-14 13:39:44,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:44,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:44,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:44,834 INFO L85 PathProgramCache]: Analyzing trace with hash -827561134, now seen corresponding path program 5 times [2022-07-14 13:39:44,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:44,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354639509] [2022-07-14 13:39:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:44,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:39:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:39:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354639509] [2022-07-14 13:39:46,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354639509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:39:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290499094] [2022-07-14 13:39:46,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 13:39:46,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:39:46,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:39:46,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 13:39:46,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-07-14 13:39:46,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:39:46,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-14 13:39:46,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:39:47,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:47,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:39:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:39:51,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290499094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:39:51,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:39:51,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2022-07-14 13:39:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906831309] [2022-07-14 13:39:51,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:39:51,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-07-14 13:39:51,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:39:51,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-07-14 13:39:51,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2022-07-14 13:39:51,394 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:39:56,145 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2022-07-14 13:39:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-07-14 13:39:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2022-07-14 13:39:56,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:39:56,156 INFO L225 Difference]: With dead ends: 481 [2022-07-14 13:39:56,156 INFO L226 Difference]: Without dead ends: 480 [2022-07-14 13:39:56,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2022-07-14 13:39:56,174 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1634 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 13:39:56,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1634 Valid, 40 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 13:39:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-07-14 13:39:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2022-07-14 13:39:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 383 states have (on average 1.0026109660574412) internal successors, (384), 383 states have internal predecessors, (384), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2022-07-14 13:39:56,204 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 238 [2022-07-14 13:39:56,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:39:56,205 INFO L495 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2022-07-14 13:39:56,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:39:56,206 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2022-07-14 13:39:56,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2022-07-14 13:39:56,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:39:56,210 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1, 1] [2022-07-14 13:39:56,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 13:39:56,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:39:56,427 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:39:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:39:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1782455378, now seen corresponding path program 6 times [2022-07-14 13:39:56,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:39:56,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718982953] [2022-07-14 13:39:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:39:56,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:39:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:40:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:40:02,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:40:02,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718982953] [2022-07-14 13:40:02,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718982953] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:40:02,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37164879] [2022-07-14 13:40:02,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 13:40:02,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:40:02,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:40:02,872 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:40:02,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 13:40:03,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2022-07-14 13:40:03,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 13:40:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 192 conjunts are in the unsatisfiable core [2022-07-14 13:40:03,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:40:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:40:03,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:40:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:40:19,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37164879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:40:19,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:40:19,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2022-07-14 13:40:19,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159375850] [2022-07-14 13:40:19,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:40:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2022-07-14 13:40:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:40:19,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2022-07-14 13:40:19,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2022-07-14 13:40:19,667 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:40:48,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 13:40:48,651 INFO L93 Difference]: Finished difference Result 961 states and 1056 transitions. [2022-07-14 13:40:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-07-14 13:40:48,652 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 478 [2022-07-14 13:40:48,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 13:40:48,657 INFO L225 Difference]: With dead ends: 961 [2022-07-14 13:40:48,657 INFO L226 Difference]: Without dead ends: 960 [2022-07-14 13:40:48,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 763 SyntacticMatches, 1 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2022-07-14 13:40:48,672 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3594 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1735 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3594 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 1836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 13:40:48,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3594 Valid, 57 Invalid, 1836 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [101 Valid, 1735 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-14 13:40:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-07-14 13:40:48,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 959. [2022-07-14 13:40:48,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 767 states have (on average 1.001303780964798) internal successors, (768), 767 states have internal predecessors, (768), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:40:48,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 959 transitions. [2022-07-14 13:40:48,716 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 959 transitions. Word has length 478 [2022-07-14 13:40:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 13:40:48,716 INFO L495 AbstractCegarLoop]: Abstraction has 959 states and 959 transitions. [2022-07-14 13:40:48,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 13:40:48,719 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 959 transitions. [2022-07-14 13:40:48,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2022-07-14 13:40:48,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 13:40:48,739 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1, 1] [2022-07-14 13:40:48,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-14 13:40:48,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-14 13:40:48,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-14 13:40:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 13:40:48,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1752727982, now seen corresponding path program 7 times [2022-07-14 13:40:48,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 13:40:48,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971478089] [2022-07-14 13:40:48,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 13:40:48,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 13:40:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:41:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:41:11,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 13:41:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971478089] [2022-07-14 13:41:11,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971478089] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 13:41:11,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278723165] [2022-07-14 13:41:11,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 13:41:11,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 13:41:11,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 13:41:11,797 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 13:41:11,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 13:41:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 13:41:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 384 conjunts are in the unsatisfiable core [2022-07-14 13:41:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 13:41:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:41:12,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 13:42:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 13:42:14,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278723165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 13:42:14,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 13:42:14,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2022-07-14 13:42:14,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697080096] [2022-07-14 13:42:14,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 13:42:14,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2022-07-14 13:42:14,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 13:42:14,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2022-07-14 13:42:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2022-07-14 13:42:14,619 INFO L87 Difference]: Start difference. First operand 959 states and 959 transitions. Second operand has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)