./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 e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_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-dev-e19ca92 [2021-12-22 19:24:08,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 19:24:08,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 19:24:08,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 19:24:08,464 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 19:24:08,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 19:24:08,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 19:24:08,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 19:24:08,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 19:24:08,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 19:24:08,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 19:24:08,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 19:24:08,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 19:24:08,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 19:24:08,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 19:24:08,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 19:24:08,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 19:24:08,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 19:24:08,491 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 19:24:08,496 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 19:24:08,497 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 19:24:08,498 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 19:24:08,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 19:24:08,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 19:24:08,512 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 19:24:08,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 19:24:08,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 19:24:08,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 19:24:08,514 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 19:24:08,515 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 19:24:08,515 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 19:24:08,516 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 19:24:08,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 19:24:08,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 19:24:08,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 19:24:08,520 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 19:24:08,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 19:24:08,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 19:24:08,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 19:24:08,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 19:24:08,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 19:24:08,522 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-22 19:24:08,550 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 19:24:08,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 19:24:08,551 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 19:24:08,551 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 19:24:08,552 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 19:24:08,552 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 19:24:08,552 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 19:24:08,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 19:24:08,553 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 19:24:08,553 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 19:24:08,554 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-22 19:24:08,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 19:24:08,554 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 19:24:08,554 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 19:24:08,555 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 19:24:08,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 19:24:08,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 19:24:08,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 19:24:08,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:24:08,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 19:24:08,557 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 19:24:08,558 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2021-12-22 19:24:08,782 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 19:24:08,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 19:24:08,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 19:24:08,814 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 19:24:08,814 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 19:24:08,815 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-22 19:24:08,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d18d35fd/a0382b9bd33447769d89c9511ac877a3/FLAGcef8dc94c [2021-12-22 19:24:09,300 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 19:24:09,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-22 19:24:09,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d18d35fd/a0382b9bd33447769d89c9511ac877a3/FLAGcef8dc94c [2021-12-22 19:24:09,711 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d18d35fd/a0382b9bd33447769d89c9511ac877a3 [2021-12-22 19:24:09,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 19:24:09,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 19:24:09,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 19:24:09,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 19:24:09,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 19:24:09,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0a4d12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09, skipping insertion in model container [2021-12-22 19:24:09,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 19:24:09,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 19:24:09,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:24:09,877 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 19:24:09,890 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 19:24:09,898 INFO L208 MainTranslator]: Completed translation [2021-12-22 19:24:09,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09 WrapperNode [2021-12-22 19:24:09,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 19:24:09,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 19:24:09,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 19:24:09,902 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 19:24:09,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,923 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2021-12-22 19:24:09,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 19:24:09,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 19:24:09,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 19:24:09,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 19:24:09,931 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,931 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,934 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 19:24:09,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 19:24:09,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 19:24:09,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 19:24:09,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (1/1) ... [2021-12-22 19:24:09,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 19:24:09,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:09,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 19:24:10,010 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-12-22 19:24:10,010 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-12-22 19:24:10,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 19:24:10,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 19:24:10,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 19:24:10,053 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 19:24:10,055 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 19:24:10,186 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 19:24:10,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 19:24:10,194 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 19:24:10,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:10 BoogieIcfgContainer [2021-12-22 19:24:10,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 19:24:10,199 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 19:24:10,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 19:24:10,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 19:24:10,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:24:09" (1/3) ... [2021-12-22 19:24:10,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3a6a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:10, skipping insertion in model container [2021-12-22 19:24:10,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:24:09" (2/3) ... [2021-12-22 19:24:10,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c3a6a6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:24:10, skipping insertion in model container [2021-12-22 19:24:10,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:24:10" (3/3) ... [2021-12-22 19:24:10,205 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2021-12-22 19:24:10,209 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 19:24:10,210 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-22 19:24:10,257 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 19:24:10,266 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 19:24:10,266 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-22 19:24:10,283 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) [2021-12-22 19:24:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-22 19:24:10,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,287 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:10,288 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:10,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2021-12-22 19:24:10,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:10,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451618375] [2021-12-22 19:24:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:10,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:10,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451618375] [2021-12-22 19:24:10,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451618375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:10,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:10,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:24:10,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320335237] [2021-12-22 19:24:10,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:10,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:24:10,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:10,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:24:10,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:24:10,581 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) [2021-12-22 19:24:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:10,689 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-22 19:24:10,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:24:10,693 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 [2021-12-22 19:24:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:10,700 INFO L225 Difference]: With dead ends: 42 [2021-12-22 19:24:10,700 INFO L226 Difference]: Without dead ends: 37 [2021-12-22 19:24:10,704 INFO L932 BasicCegarLoop]: 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 [2021-12-22 19:24:10,711 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-22 19:24:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-22 19:24:10,750 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) [2021-12-22 19:24:10,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-22 19:24:10,754 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-12-22 19:24:10,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:10,754 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-22 19:24:10,755 INFO L471 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) [2021-12-22 19:24:10,755 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-22 19:24:10,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-22 19:24:10,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,756 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:10,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 19:24:10,757 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:10,758 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2021-12-22 19:24:10,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:10,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930574574] [2021-12-22 19:24:10,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:10,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:10,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930574574] [2021-12-22 19:24:10,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930574574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:10,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:10,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 19:24:10,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270323740] [2021-12-22 19:24:10,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:10,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 19:24:10,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:10,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 19:24:10,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 19:24:10,808 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) [2021-12-22 19:24:10,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:10,865 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-12-22 19:24:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 19:24:10,866 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 [2021-12-22 19:24:10,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:10,867 INFO L225 Difference]: With dead ends: 51 [2021-12-22 19:24:10,867 INFO L226 Difference]: Without dead ends: 47 [2021-12-22 19:24:10,868 INFO L932 BasicCegarLoop]: 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 [2021-12-22 19:24:10,869 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:10,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:10,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-22 19:24:10,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-22 19:24:10,878 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) [2021-12-22 19:24:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-22 19:24:10,880 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2021-12-22 19:24:10,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:10,881 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-22 19:24:10,881 INFO L471 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) [2021-12-22 19:24:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-22 19:24:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-22 19:24:10,882 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:10,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:10,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 19:24:10,882 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:10,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash 496687761, now seen corresponding path program 1 times [2021-12-22 19:24:10,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:10,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349977916] [2021-12-22 19:24:10,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:10,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:10,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349977916] [2021-12-22 19:24:10,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349977916] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:10,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964837075] [2021-12-22 19:24:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:10,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:10,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:10,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:24:10,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 19:24:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:10,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 19:24:10,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:11,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:11,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964837075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:11,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:11,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-22 19:24:11,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392911671] [2021-12-22 19:24:11,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-22 19:24:11,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-22 19:24:11,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-22 19:24:11,204 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) [2021-12-22 19:24:11,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,443 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-22 19:24:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 19:24:11,444 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 [2021-12-22 19:24:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,445 INFO L225 Difference]: With dead ends: 96 [2021-12-22 19:24:11,446 INFO L226 Difference]: Without dead ends: 95 [2021-12-22 19:24:11,446 INFO L932 BasicCegarLoop]: 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 [2021-12-22 19:24:11,447 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 116 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:11,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-22 19:24:11,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-12-22 19:24:11,472 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) [2021-12-22 19:24:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2021-12-22 19:24:11,476 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 13 [2021-12-22 19:24:11,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,476 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2021-12-22 19:24:11,477 INFO L471 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) [2021-12-22 19:24:11,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2021-12-22 19:24:11,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-22 19:24:11,478 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:11,478 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:11,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:11,691 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:11,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,691 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2021-12-22 19:24:11,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234896246] [2021-12-22 19:24:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:11,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:11,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234896246] [2021-12-22 19:24:11,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234896246] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:11,742 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:11,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 19:24:11,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615599249] [2021-12-22 19:24:11,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 19:24:11,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 19:24:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:11,749 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) [2021-12-22 19:24:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,785 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2021-12-22 19:24:11,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 19:24:11,786 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 [2021-12-22 19:24:11,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,790 INFO L225 Difference]: With dead ends: 117 [2021-12-22 19:24:11,791 INFO L226 Difference]: Without dead ends: 116 [2021-12-22 19:24:11,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 19:24:11,793 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:11,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-22 19:24:11,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-12-22 19:24:11,811 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) [2021-12-22 19:24:11,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2021-12-22 19:24:11,814 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 15 [2021-12-22 19:24:11,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,814 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2021-12-22 19:24:11,814 INFO L471 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) [2021-12-22 19:24:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2021-12-22 19:24:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 19:24:11,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:11,815 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 19:24:11,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2021-12-22 19:24:11,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893101672] [2021-12-22 19:24:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:11,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:11,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893101672] [2021-12-22 19:24:11,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893101672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:11,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:11,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 19:24:11,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490303327] [2021-12-22 19:24:11,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:11,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 19:24:11,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:11,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 19:24:11,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:11,877 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) [2021-12-22 19:24:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:11,908 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2021-12-22 19:24:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 19:24:11,909 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 [2021-12-22 19:24:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:11,910 INFO L225 Difference]: With dead ends: 99 [2021-12-22 19:24:11,910 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 19:24:11,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 19:24:11,911 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:11,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 19:24:11,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 19:24:11,930 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) [2021-12-22 19:24:11,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-12-22 19:24:11,937 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 16 [2021-12-22 19:24:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-12-22 19:24:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-22 19:24:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-12-22 19:24:11,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-22 19:24:11,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:11,939 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:11,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 19:24:11,939 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:11,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:11,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2021-12-22 19:24:11,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285845818] [2021-12-22 19:24:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:11,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:12,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:12,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285845818] [2021-12-22 19:24:12,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285845818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:12,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:12,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:12,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905717219] [2021-12-22 19:24:12,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:12,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:12,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:12,051 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) [2021-12-22 19:24:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:12,168 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2021-12-22 19:24:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 19:24:12,168 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 [2021-12-22 19:24:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:12,174 INFO L225 Difference]: With dead ends: 137 [2021-12-22 19:24:12,175 INFO L226 Difference]: Without dead ends: 136 [2021-12-22 19:24:12,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-22 19:24:12,176 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:12,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-22 19:24:12,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-12-22 19:24:12,194 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) [2021-12-22 19:24:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2021-12-22 19:24:12,196 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 20 [2021-12-22 19:24:12,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:12,197 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2021-12-22 19:24:12,197 INFO L471 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) [2021-12-22 19:24:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2021-12-22 19:24:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-22 19:24:12,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:12,198 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:12,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 19:24:12,199 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2021-12-22 19:24:12,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:12,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097074475] [2021-12-22 19:24:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:12,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:12,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:12,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:12,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097074475] [2021-12-22 19:24:12,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097074475] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 19:24:12,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 19:24:12,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 19:24:12,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062368843] [2021-12-22 19:24:12,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 19:24:12,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 19:24:12,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:12,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 19:24:12,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 19:24:12,262 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) [2021-12-22 19:24:12,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:12,312 INFO L93 Difference]: Finished difference Result 149 states and 199 transitions. [2021-12-22 19:24:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 19:24:12,312 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 [2021-12-22 19:24:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:12,313 INFO L225 Difference]: With dead ends: 149 [2021-12-22 19:24:12,314 INFO L226 Difference]: Without dead ends: 78 [2021-12-22 19:24:12,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-22 19:24:12,316 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:12,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 19:24:12,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-22 19:24:12,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-12-22 19:24:12,324 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) [2021-12-22 19:24:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-22 19:24:12,325 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2021-12-22 19:24:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:12,325 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-22 19:24:12,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (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) [2021-12-22 19:24:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-22 19:24:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-22 19:24:12,327 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:12,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 19:24:12,329 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1579949547, now seen corresponding path program 2 times [2021-12-22 19:24:12,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:12,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677008523] [2021-12-22 19:24:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:12,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:12,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:12,388 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:12,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:12,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677008523] [2021-12-22 19:24:12,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677008523] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670447643] [2021-12-22 19:24:12,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:24:12,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:12,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:12,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 19:24:12,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 19:24:12,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:24:12,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:12,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 19:24:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:12,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670447643] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:12,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-22 19:24:12,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202839887] [2021-12-22 19:24:12,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 19:24:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:12,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 19:24:12,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-22 19:24:12,678 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) [2021-12-22 19:24:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:12,904 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-12-22 19:24:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-22 19:24:12,906 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 [2021-12-22 19:24:12,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:12,907 INFO L225 Difference]: With dead ends: 93 [2021-12-22 19:24:12,907 INFO L226 Difference]: Without dead ends: 77 [2021-12-22 19:24:12,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-12-22 19:24:12,909 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:12,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 92 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-22 19:24:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2021-12-22 19:24:12,916 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) [2021-12-22 19:24:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-22 19:24:12,917 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 26 [2021-12-22 19:24:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:12,917 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-22 19:24:12,917 INFO L471 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) [2021-12-22 19:24:12,918 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-22 19:24:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-22 19:24:12,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:12,919 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-12-22 19:24:12,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:13,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-22 19:24:13,143 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1990306702, now seen corresponding path program 2 times [2021-12-22 19:24:13,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:13,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061771744] [2021-12-22 19:24:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:13,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:13,256 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:13,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061771744] [2021-12-22 19:24:13,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061771744] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:13,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890379453] [2021-12-22 19:24:13,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 19:24:13,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:13,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:13,259 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) [2021-12-22 19:24:13,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 19:24:13,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 19:24:13,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:13,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 19:24:13,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:13,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:13,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890379453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:13,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:13,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-22 19:24:13,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923389045] [2021-12-22 19:24:13,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:13,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-22 19:24:13,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:13,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-22 19:24:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-22 19:24:13,567 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) [2021-12-22 19:24:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:13,972 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-12-22 19:24:13,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-22 19:24:13,972 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 [2021-12-22 19:24:13,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:13,975 INFO L225 Difference]: With dead ends: 148 [2021-12-22 19:24:13,975 INFO L226 Difference]: Without dead ends: 147 [2021-12-22 19:24:13,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-22 19:24:13,978 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 312 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:13,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 116 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-22 19:24:13,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2021-12-22 19:24:13,994 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) [2021-12-22 19:24:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-12-22 19:24:13,995 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 28 [2021-12-22 19:24:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:13,995 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-12-22 19:24:13,996 INFO L471 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) [2021-12-22 19:24:13,996 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-12-22 19:24:13,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 19:24:13,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:13,997 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 19:24:14,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:14,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:14,208 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:14,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:14,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1862709720, now seen corresponding path program 3 times [2021-12-22 19:24:14,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:14,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512323538] [2021-12-22 19:24:14,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:14,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:14,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-22 19:24:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:14,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512323538] [2021-12-22 19:24:14,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512323538] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:14,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929917528] [2021-12-22 19:24:14,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:24:14,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:14,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:14,352 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) [2021-12-22 19:24:14,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 19:24:14,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-22 19:24:14,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:14,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 19:24:14,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:14,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 19:24:14,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929917528] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:14,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:14,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-22 19:24:14,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306254656] [2021-12-22 19:24:14,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:14,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-22 19:24:14,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:14,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-22 19:24:14,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-22 19:24:14,684 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) [2021-12-22 19:24:14,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:14,815 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2021-12-22 19:24:14,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 19:24:14,816 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 [2021-12-22 19:24:14,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:14,816 INFO L225 Difference]: With dead ends: 122 [2021-12-22 19:24:14,817 INFO L226 Difference]: Without dead ends: 59 [2021-12-22 19:24:14,818 INFO L932 BasicCegarLoop]: 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 [2021-12-22 19:24:14,819 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:14,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 84 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:14,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-22 19:24:14,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-22 19:24:14,830 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) [2021-12-22 19:24:14,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-22 19:24:14,831 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 41 [2021-12-22 19:24:14,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:14,832 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-22 19:24:14,832 INFO L471 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) [2021-12-22 19:24:14,832 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-22 19:24:14,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 19:24:14,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:14,836 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-12-22 19:24:14,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:15,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:15,059 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:15,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:15,060 INFO L85 PathProgramCache]: Analyzing trace with hash 235894418, now seen corresponding path program 3 times [2021-12-22 19:24:15,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:15,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746597249] [2021-12-22 19:24:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:15,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:15,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:15,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746597249] [2021-12-22 19:24:15,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746597249] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:15,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241024816] [2021-12-22 19:24:15,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 19:24:15,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:15,311 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) [2021-12-22 19:24:15,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 19:24:15,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-22 19:24:15,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:15,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-22 19:24:15,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:15,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:16,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241024816] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:16,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:16,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-22 19:24:16,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155269826] [2021-12-22 19:24:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:16,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-22 19:24:16,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-22 19:24:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-22 19:24:16,110 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) [2021-12-22 19:24:16,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:16,632 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-12-22 19:24:16,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-22 19:24:16,633 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 [2021-12-22 19:24:16,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:16,634 INFO L225 Difference]: With dead ends: 121 [2021-12-22 19:24:16,634 INFO L226 Difference]: Without dead ends: 120 [2021-12-22 19:24:16,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2021-12-22 19:24:16,636 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:16,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 48 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 19:24:16,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-22 19:24:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-12-22 19:24:16,647 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) [2021-12-22 19:24:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-12-22 19:24:16,648 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 58 [2021-12-22 19:24:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:16,648 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-12-22 19:24:16,649 INFO L471 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) [2021-12-22 19:24:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-12-22 19:24:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-22 19:24:16,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:16,651 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-12-22 19:24:16,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:16,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 19:24:16,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:16,878 INFO L85 PathProgramCache]: Analyzing trace with hash -102214958, now seen corresponding path program 4 times [2021-12-22 19:24:16,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:16,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146985383] [2021-12-22 19:24:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:16,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:17,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146985383] [2021-12-22 19:24:17,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146985383] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:17,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889094772] [2021-12-22 19:24:17,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-22 19:24:17,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:17,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:17,760 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) [2021-12-22 19:24:17,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 19:24:17,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-22 19:24:17,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-22 19:24:17,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:18,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:18,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:19,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889094772] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:19,912 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:19,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-22 19:24:19,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470452703] [2021-12-22 19:24:19,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:19,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-22 19:24:19,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:19,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-22 19:24:19,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-22 19:24:19,917 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) [2021-12-22 19:24:21,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:21,497 INFO L93 Difference]: Finished difference Result 241 states and 264 transitions. [2021-12-22 19:24:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-22 19:24:21,498 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 [2021-12-22 19:24:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:21,499 INFO L225 Difference]: With dead ends: 241 [2021-12-22 19:24:21,499 INFO L226 Difference]: Without dead ends: 240 [2021-12-22 19:24:21,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5549, Invalid=14473, Unknown=0, NotChecked=0, Total=20022 [2021-12-22 19:24:21,504 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 793 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:21,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 48 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 19:24:21,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-22 19:24:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-12-22 19:24:21,518 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) [2021-12-22 19:24:21,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-12-22 19:24:21,519 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 118 [2021-12-22 19:24:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:21,520 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-12-22 19:24:21,520 INFO L471 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) [2021-12-22 19:24:21,520 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-12-22 19:24:21,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-22 19:24:21,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:21,522 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2021-12-22 19:24:21,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:21,748 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -827561134, now seen corresponding path program 5 times [2021-12-22 19:24:21,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:21,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377963746] [2021-12-22 19:24:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:21,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:24,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377963746] [2021-12-22 19:24:24,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377963746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:24,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201101033] [2021-12-22 19:24:24,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-22 19:24:24,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:24,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:24,258 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) [2021-12-22 19:24:24,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 19:24:24,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-22 19:24:24,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-22 19:24:24,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:24,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 19:24:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:31,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201101033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 19:24:31,189 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 19:24:31,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-12-22 19:24:31,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605584062] [2021-12-22 19:24:31,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 19:24:31,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-12-22 19:24:31,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 19:24:31,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-12-22 19:24:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-12-22 19:24:31,198 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) [2021-12-22 19:24:37,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 19:24:37,744 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2021-12-22 19:24:37,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-22 19:24:37,745 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 [2021-12-22 19:24:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 19:24:37,749 INFO L225 Difference]: With dead ends: 481 [2021-12-22 19:24:37,749 INFO L226 Difference]: Without dead ends: 480 [2021-12-22 19:24:37,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2021-12-22 19:24:37,756 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1634 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-22 19:24:37,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 47 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-22 19:24:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-22 19:24:37,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-12-22 19:24:37,787 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) [2021-12-22 19:24:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2021-12-22 19:24:37,790 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 238 [2021-12-22 19:24:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 19:24:37,790 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2021-12-22 19:24:37,791 INFO L471 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) [2021-12-22 19:24:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2021-12-22 19:24:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-22 19:24:37,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 19:24:37,801 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1, 1] [2021-12-22 19:24:37,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 19:24:38,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:38,024 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-22 19:24:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 19:24:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1782455378, now seen corresponding path program 6 times [2021-12-22 19:24:38,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 19:24:38,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285239658] [2021-12-22 19:24:38,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 19:24:38,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 19:24:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 19:24:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:47,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 19:24:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285239658] [2021-12-22 19:24:47,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285239658] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 19:24:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168381031] [2021-12-22 19:24:47,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-22 19:24:47,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 19:24:47,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 19:24:47,426 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) [2021-12-22 19:24:47,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 19:24:47,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-22 19:24:47,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 19:24:47,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-22 19:24:47,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 19:24:48,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 19:24:48,906 INFO L328 TraceCheckSpWp]: Computing backward predicates...