./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 35987657 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-lit/LeeJonesBen-Amram-POPL2001-Ex5.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 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 00:36:08,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 00:36:08,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 00:36:08,985 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 00:36:08,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 00:36:08,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 00:36:08,990 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 00:36:08,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 00:36:08,994 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 00:36:08,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 00:36:08,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 00:36:09,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 00:36:09,002 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 00:36:09,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 00:36:09,004 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 00:36:09,005 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 00:36:09,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 00:36:09,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 00:36:09,009 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 00:36:09,013 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 00:36:09,014 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 00:36:09,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 00:36:09,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 00:36:09,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 00:36:09,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 00:36:09,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 00:36:09,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 00:36:09,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 00:36:09,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 00:36:09,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 00:36:09,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 00:36:09,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 00:36:09,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 00:36:09,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 00:36:09,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 00:36:09,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 00:36:09,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 00:36:09,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 00:36:09,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 00:36:09,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 00:36:09,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 00:36:09,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 00:36:09,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2022-07-22 00:36:09,061 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 00:36:09,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 00:36:09,062 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 00:36:09,062 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 00:36:09,063 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 00:36:09,063 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 00:36:09,063 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 00:36:09,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 00:36:09,064 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 00:36:09,064 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 00:36:09,065 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 00:36:09,065 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 00:36:09,065 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 00:36:09,065 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 00:36:09,065 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 00:36:09,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 00:36:09,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 00:36:09,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 00:36:09,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:36:09,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 00:36:09,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 00:36:09,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 00:36:09,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 00:36:09,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 00:36:09,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 00:36:09,068 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ab1611c68b20ff5721c195b0d2c7506cb1678fd2a0003f8a2214f630d652abe [2022-07-22 00:36:09,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 00:36:09,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 00:36:09,402 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 00:36:09,403 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 00:36:09,404 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 00:36:09,405 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-22 00:36:09,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48b6efd3/978572192bc14bc1874ff705b0a0d740/FLAG583b8329d [2022-07-22 00:36:09,861 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 00:36:09,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-22 00:36:09,867 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48b6efd3/978572192bc14bc1874ff705b0a0d740/FLAG583b8329d [2022-07-22 00:36:10,292 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d48b6efd3/978572192bc14bc1874ff705b0a0d740 [2022-07-22 00:36:10,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 00:36:10,295 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 00:36:10,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 00:36:10,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 00:36:10,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 00:36:10,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b7dc05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10, skipping insertion in model container [2022-07-22 00:36:10,301 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 00:36:10,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 00:36:10,415 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:36:10,418 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 00:36:10,426 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 00:36:10,434 INFO L208 MainTranslator]: Completed translation [2022-07-22 00:36:10,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10 WrapperNode [2022-07-22 00:36:10,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 00:36:10,436 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 00:36:10,436 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 00:36:10,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 00:36:10,442 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,446 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,494 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 14 [2022-07-22 00:36:10,494 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 00:36:10,498 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 00:36:10,498 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 00:36:10,498 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 00:36:10,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,512 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,514 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 00:36:10,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 00:36:10,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 00:36:10,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 00:36:10,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (1/1) ... [2022-07-22 00:36:10,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 00:36:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:10,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 00:36:10,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 00:36:10,602 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-07-22 00:36:10,603 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-07-22 00:36:10,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 00:36:10,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 00:36:10,651 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 00:36:10,652 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 00:36:10,797 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 00:36:10,802 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 00:36:10,803 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 00:36:10,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:36:10 BoogieIcfgContainer [2022-07-22 00:36:10,805 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 00:36:10,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 00:36:10,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 00:36:10,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 00:36:10,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:36:10" (1/3) ... [2022-07-22 00:36:10,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea23fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:36:10, skipping insertion in model container [2022-07-22 00:36:10,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:36:10" (2/3) ... [2022-07-22 00:36:10,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea23fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:36:10, skipping insertion in model container [2022-07-22 00:36:10,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:36:10" (3/3) ... [2022-07-22 00:36:10,811 INFO L111 eAbstractionObserver]: Analyzing ICFG LeeJonesBen-Amram-POPL2001-Ex5.c [2022-07-22 00:36:10,827 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 00:36:10,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-22 00:36:10,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 00:36:10,884 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1fe2c1ab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2aedfcca [2022-07-22 00:36:10,884 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 00:36:10,888 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 00:36:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:36:10,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:10,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:10,894 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:10,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:10,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225386, now seen corresponding path program 1 times [2022-07-22 00:36:10,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:10,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442047141] [2022-07-22 00:36:10,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:10,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:11,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442047141] [2022-07-22 00:36:11,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442047141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:11,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:36:11,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:36:11,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586841123] [2022-07-22 00:36:11,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:11,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:36:11,140 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 states have internal predecessors, (24), 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 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:11,248 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-07-22 00:36:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:36:11,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 00:36:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:11,256 INFO L225 Difference]: With dead ends: 45 [2022-07-22 00:36:11,257 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 00:36:11,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:36:11,261 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:11,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:11,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 00:36:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 23. [2022-07-22 00:36:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 2 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-07-22 00:36:11,289 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 8 [2022-07-22 00:36:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:11,289 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-07-22 00:36:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,290 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-07-22 00:36:11,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 00:36:11,291 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:11,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:11,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 00:36:11,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:11,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1484225162, now seen corresponding path program 1 times [2022-07-22 00:36:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:11,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301157568] [2022-07-22 00:36:11,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:11,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301157568] [2022-07-22 00:36:11,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301157568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:11,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:36:11,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:36:11,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254189296] [2022-07-22 00:36:11,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:11,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:11,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:11,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:11,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:36:11,353 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:11,411 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2022-07-22 00:36:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:36:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 00:36:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:11,413 INFO L225 Difference]: With dead ends: 35 [2022-07-22 00:36:11,413 INFO L226 Difference]: Without dead ends: 34 [2022-07-22 00:36:11,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:36:11,427 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:11,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-22 00:36:11,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2022-07-22 00:36:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-07-22 00:36:11,432 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2022-07-22 00:36:11,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:11,432 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-07-22 00:36:11,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-07-22 00:36:11,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:36:11,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:11,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:11,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 00:36:11,433 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:11,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1233653331, now seen corresponding path program 1 times [2022-07-22 00:36:11,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:11,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177523769] [2022-07-22 00:36:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:11,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:11,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177523769] [2022-07-22 00:36:11,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177523769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:11,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:36:11,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:36:11,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594786681] [2022-07-22 00:36:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:11,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:36:11,469 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:11,492 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-22 00:36:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:36:11,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-07-22 00:36:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:11,493 INFO L225 Difference]: With dead ends: 34 [2022-07-22 00:36:11,493 INFO L226 Difference]: Without dead ends: 33 [2022-07-22 00:36:11,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:36:11,495 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:11,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 46 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-22 00:36:11,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-07-22 00:36:11,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.380952380952381) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-07-22 00:36:11,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 9 [2022-07-22 00:36:11,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:11,500 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-07-22 00:36:11,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,500 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-07-22 00:36:11,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 00:36:11,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:11,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:11,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 00:36:11,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1233660282, now seen corresponding path program 1 times [2022-07-22 00:36:11,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:11,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468213889] [2022-07-22 00:36:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:11,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:11,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:11,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468213889] [2022-07-22 00:36:11,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468213889] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:11,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 00:36:11,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 00:36:11,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745295997] [2022-07-22 00:36:11,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:11,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:11,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:11,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:11,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 00:36:11,539 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:11,584 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-07-22 00:36:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 00:36:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2022-07-22 00:36:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:11,589 INFO L225 Difference]: With dead ends: 33 [2022-07-22 00:36:11,589 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 00:36:11,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 00:36:11,591 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:11,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 39 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 00:36:11,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-07-22 00:36:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-22 00:36:11,597 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 9 [2022-07-22 00:36:11,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:11,597 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-22 00:36:11,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,597 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-22 00:36:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 00:36:11,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:11,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:11,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 00:36:11,598 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -525255530, now seen corresponding path program 1 times [2022-07-22 00:36:11,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:11,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595915506] [2022-07-22 00:36:11,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:11,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595915506] [2022-07-22 00:36:11,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595915506] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:11,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405964921] [2022-07-22 00:36:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:11,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:11,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:11,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:11,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 00:36:11,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:36:11,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:11,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:36:11,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405964921] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:11,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 00:36:11,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-22 00:36:11,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795445924] [2022-07-22 00:36:11,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:11,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:11,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:11,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:11,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 00:36:11,789 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:11,859 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-07-22 00:36:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:36:11,864 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-22 00:36:11,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:11,865 INFO L225 Difference]: With dead ends: 44 [2022-07-22 00:36:11,865 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 00:36:11,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-22 00:36:11,867 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:11,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 00:36:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2022-07-22 00:36:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-07-22 00:36:11,874 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2022-07-22 00:36:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:11,874 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-07-22 00:36:11,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:11,875 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-07-22 00:36:11,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 00:36:11,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:11,875 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:11,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:12,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:12,082 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:12,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash 909324273, now seen corresponding path program 1 times [2022-07-22 00:36:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:12,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022747503] [2022-07-22 00:36:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:12,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:12,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:12,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022747503] [2022-07-22 00:36:12,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022747503] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:12,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640308290] [2022-07-22 00:36:12,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:12,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:12,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 00:36:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:12,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:36:12,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:12,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:12,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640308290] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:12,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:12,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:36:12,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814562148] [2022-07-22 00:36:12,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:36:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:36:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:36:12,233 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:12,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:12,612 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2022-07-22 00:36:12,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 00:36:12,613 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2022-07-22 00:36:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:12,619 INFO L225 Difference]: With dead ends: 87 [2022-07-22 00:36:12,620 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 00:36:12,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=608, Unknown=0, NotChecked=0, Total=812 [2022-07-22 00:36:12,628 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:12,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 52 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:36:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 00:36:12,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 48. [2022-07-22 00:36:12,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.368421052631579) internal successors, (52), 41 states have internal predecessors, (52), 7 states have call successors, (7), 6 states have call predecessors, (7), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:12,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-22 00:36:12,655 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 14 [2022-07-22 00:36:12,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:12,656 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-22 00:36:12,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-22 00:36:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 00:36:12,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:12,658 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:12,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:12,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 00:36:12,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:12,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:12,868 INFO L85 PathProgramCache]: Analyzing trace with hash 909324497, now seen corresponding path program 1 times [2022-07-22 00:36:12,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:12,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678526361] [2022-07-22 00:36:12,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678526361] [2022-07-22 00:36:12,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678526361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:12,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745279203] [2022-07-22 00:36:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:12,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:12,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:12,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 00:36:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:12,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:36:12,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:12,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745279203] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:13,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:13,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:36:13,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267633558] [2022-07-22 00:36:13,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:13,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:36:13,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:13,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:36:13,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:36:13,024 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:13,129 INFO L93 Difference]: Finished difference Result 50 states and 61 transitions. [2022-07-22 00:36:13,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 00:36:13,130 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 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 14 [2022-07-22 00:36:13,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:13,131 INFO L225 Difference]: With dead ends: 50 [2022-07-22 00:36:13,134 INFO L226 Difference]: Without dead ends: 49 [2022-07-22 00:36:13,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-07-22 00:36:13,135 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:13,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 32 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:13,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-22 00:36:13,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 22. [2022-07-22 00:36:13,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 00:36:13,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2022-07-22 00:36:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:13,140 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 00:36:13,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 00:36:13,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 00:36:13,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:13,140 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:13,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:13,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:13,341 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash 896940851, now seen corresponding path program 1 times [2022-07-22 00:36:13,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:13,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221592575] [2022-07-22 00:36:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:13,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221592575] [2022-07-22 00:36:13,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221592575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348052757] [2022-07-22 00:36:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:13,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:13,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:13,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:13,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 00:36:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:13,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:36:13,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348052757] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:13,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:13,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:36:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625806041] [2022-07-22 00:36:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:36:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:36:13,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:36:13,466 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:13,539 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-07-22 00:36:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 00:36:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2022-07-22 00:36:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:13,540 INFO L225 Difference]: With dead ends: 55 [2022-07-22 00:36:13,540 INFO L226 Difference]: Without dead ends: 54 [2022-07-22 00:36:13,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-22 00:36:13,541 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:13,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 85 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-22 00:36:13,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2022-07-22 00:36:13,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-07-22 00:36:13,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 15 [2022-07-22 00:36:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:13,555 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-07-22 00:36:13,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-07-22 00:36:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 00:36:13,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:13,556 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:13,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:13,763 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash 896947802, now seen corresponding path program 1 times [2022-07-22 00:36:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:13,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280026091] [2022-07-22 00:36:13,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:13,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:13,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280026091] [2022-07-22 00:36:13,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280026091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:13,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259689835] [2022-07-22 00:36:13,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:13,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:13,809 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:13,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 00:36:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:13,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 00:36:13,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:13,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 00:36:13,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259689835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 00:36:13,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 00:36:13,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2022-07-22 00:36:13,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400119396] [2022-07-22 00:36:13,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 00:36:13,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 00:36:13,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:13,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 00:36:13,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 00:36:13,882 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:13,928 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-07-22 00:36:13,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 00:36:13,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-22 00:36:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:13,930 INFO L225 Difference]: With dead ends: 51 [2022-07-22 00:36:13,930 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 00:36:13,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-07-22 00:36:13,932 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:13,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 48 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 00:36:13,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2022-07-22 00:36:13,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 36 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2022-07-22 00:36:13,949 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 15 [2022-07-22 00:36:13,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:13,949 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2022-07-22 00:36:13,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:13,949 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2022-07-22 00:36:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 00:36:13,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:13,951 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:13,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 00:36:14,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:14,168 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:14,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:14,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1875718568, now seen corresponding path program 1 times [2022-07-22 00:36:14,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:14,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648491438] [2022-07-22 00:36:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:14,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:14,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:14,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648491438] [2022-07-22 00:36:14,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648491438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:14,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808440902] [2022-07-22 00:36:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:14,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:14,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:14,198 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:14,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 00:36:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:14,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:36:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:14,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808440902] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:14,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:14,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:36:14,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817508151] [2022-07-22 00:36:14,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:14,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:36:14,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:14,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:36:14,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:36:14,266 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:14,499 INFO L93 Difference]: Finished difference Result 87 states and 99 transitions. [2022-07-22 00:36:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 00:36:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2022-07-22 00:36:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:14,500 INFO L225 Difference]: With dead ends: 87 [2022-07-22 00:36:14,501 INFO L226 Difference]: Without dead ends: 85 [2022-07-22 00:36:14,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-07-22 00:36:14,502 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:14,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 111 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:14,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-22 00:36:14,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-07-22 00:36:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 56 states have internal predecessors, (68), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:14,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2022-07-22 00:36:14,524 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 15 [2022-07-22 00:36:14,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:14,524 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2022-07-22 00:36:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:14,525 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2022-07-22 00:36:14,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 00:36:14,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:14,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:14,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:14,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:14,744 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:14,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1875711617, now seen corresponding path program 1 times [2022-07-22 00:36:14,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:14,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330603537] [2022-07-22 00:36:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:14,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:14,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330603537] [2022-07-22 00:36:14,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330603537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:14,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852220000] [2022-07-22 00:36:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:14,778 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:14,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 00:36:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:14,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 00:36:14,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:14,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852220000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:14,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:14,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 00:36:14,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761495415] [2022-07-22 00:36:14,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:14,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 00:36:14,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:14,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 00:36:14,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-22 00:36:14,875 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:15,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:15,134 INFO L93 Difference]: Finished difference Result 102 states and 118 transitions. [2022-07-22 00:36:15,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 00:36:15,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 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 15 [2022-07-22 00:36:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:15,135 INFO L225 Difference]: With dead ends: 102 [2022-07-22 00:36:15,135 INFO L226 Difference]: Without dead ends: 100 [2022-07-22 00:36:15,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2022-07-22 00:36:15,136 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:15,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 53 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:15,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-22 00:36:15,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2022-07-22 00:36:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.203125) internal successors, (77), 67 states have internal predecessors, (77), 13 states have call successors, (13), 11 states have call predecessors, (13), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:15,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2022-07-22 00:36:15,150 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 15 [2022-07-22 00:36:15,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:15,150 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2022-07-22 00:36:15,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:15,150 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2022-07-22 00:36:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 00:36:15,151 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:15,151 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:15,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:15,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:15,372 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:15,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:15,372 INFO L85 PathProgramCache]: Analyzing trace with hash -604655592, now seen corresponding path program 1 times [2022-07-22 00:36:15,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:15,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956549790] [2022-07-22 00:36:15,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:15,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:15,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:15,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956549790] [2022-07-22 00:36:15,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956549790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:15,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614935939] [2022-07-22 00:36:15,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:15,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:15,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:15,431 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:15,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 00:36:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:15,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:36:15,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:15,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:15,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614935939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:15,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:15,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 21 [2022-07-22 00:36:15,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508758752] [2022-07-22 00:36:15,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:15,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 00:36:15,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 00:36:15,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-22 00:36:15,639 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:16,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:16,171 INFO L93 Difference]: Finished difference Result 155 states and 179 transitions. [2022-07-22 00:36:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 00:36:16,171 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 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 27 [2022-07-22 00:36:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:16,172 INFO L225 Difference]: With dead ends: 155 [2022-07-22 00:36:16,172 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 00:36:16,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 677 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=553, Invalid=2203, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 00:36:16,173 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 298 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:16,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 93 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:16,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 00:36:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 79. [2022-07-22 00:36:16,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 66 states have internal predecessors, (79), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:16,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2022-07-22 00:36:16,183 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 27 [2022-07-22 00:36:16,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:16,184 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2022-07-22 00:36:16,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 2.789473684210526) internal successors, (53), 13 states have internal predecessors, (53), 9 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:16,184 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2022-07-22 00:36:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 00:36:16,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:16,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:16,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:16,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 00:36:16,397 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:16,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1302475036, now seen corresponding path program 1 times [2022-07-22 00:36:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:16,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54658233] [2022-07-22 00:36:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:16,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:16,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:16,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:16,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54658233] [2022-07-22 00:36:16,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54658233] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:16,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942684123] [2022-07-22 00:36:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:16,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:16,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:16,468 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:16,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 00:36:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:16,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 00:36:16,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:16,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:16,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942684123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:16,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:16,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-22 00:36:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11221402] [2022-07-22 00:36:16,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 00:36:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:16,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 00:36:16,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-22 00:36:16,602 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:17,051 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-07-22 00:36:17,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 00:36:17,051 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 00:36:17,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:17,052 INFO L225 Difference]: With dead ends: 198 [2022-07-22 00:36:17,053 INFO L226 Difference]: Without dead ends: 196 [2022-07-22 00:36:17,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=1725, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 00:36:17,054 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 171 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:17,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 85 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 00:36:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-07-22 00:36:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 121. [2022-07-22 00:36:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 100 states have (on average 1.21) internal successors, (121), 101 states have internal predecessors, (121), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 140 transitions. [2022-07-22 00:36:17,072 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 140 transitions. Word has length 27 [2022-07-22 00:36:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:17,072 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 140 transitions. [2022-07-22 00:36:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.588235294117647) internal successors, (44), 12 states have internal predecessors, (44), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 140 transitions. [2022-07-22 00:36:17,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 00:36:17,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:17,074 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-22 00:36:17,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-22 00:36:17,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 00:36:17,291 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1390087159, now seen corresponding path program 2 times [2022-07-22 00:36:17,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:17,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277352397] [2022-07-22 00:36:17,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:17,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:17,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277352397] [2022-07-22 00:36:17,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277352397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:17,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773581918] [2022-07-22 00:36:17,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:36:17,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:17,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:17,380 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 00:36:17,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:36:17,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:17,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 00:36:17,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:17,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773581918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:17,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:17,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 29 [2022-07-22 00:36:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213656695] [2022-07-22 00:36:17,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 00:36:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 00:36:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-07-22 00:36:17,687 INFO L87 Difference]: Start difference. First operand 121 states and 140 transitions. Second operand has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:18,583 INFO L93 Difference]: Finished difference Result 266 states and 306 transitions. [2022-07-22 00:36:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 00:36:18,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 00:36:18,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:18,584 INFO L225 Difference]: With dead ends: 266 [2022-07-22 00:36:18,584 INFO L226 Difference]: Without dead ends: 264 [2022-07-22 00:36:18,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1389, Invalid=5921, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 00:36:18,586 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 466 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:18,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 128 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:36:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-22 00:36:18,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 147. [2022-07-22 00:36:18,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 123 states have internal predecessors, (148), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 171 transitions. [2022-07-22 00:36:18,602 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 171 transitions. Word has length 39 [2022-07-22 00:36:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:18,603 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 171 transitions. [2022-07-22 00:36:18,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 17 states have internal predecessors, (73), 13 states have call successors, (14), 14 states have call predecessors, (14), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:18,603 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 171 transitions. [2022-07-22 00:36:18,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 00:36:18,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:18,604 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1] [2022-07-22 00:36:18,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 00:36:18,811 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 873114018, now seen corresponding path program 2 times [2022-07-22 00:36:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:18,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976594011] [2022-07-22 00:36:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:18,885 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 00:36:18,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976594011] [2022-07-22 00:36:18,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976594011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:18,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386782938] [2022-07-22 00:36:18,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:36:18,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:18,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:18,887 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:18,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 00:36:18,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:36:18,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:18,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 00:36:18,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:19,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:19,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386782938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:19,259 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:19,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 32 [2022-07-22 00:36:19,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384524563] [2022-07-22 00:36:19,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:19,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 00:36:19,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:19,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 00:36:19,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 00:36:19,260 INFO L87 Difference]: Start difference. First operand 147 states and 171 transitions. Second operand has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:20,957 INFO L93 Difference]: Finished difference Result 801 states and 933 transitions. [2022-07-22 00:36:20,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-22 00:36:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-22 00:36:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:20,959 INFO L225 Difference]: With dead ends: 801 [2022-07-22 00:36:20,959 INFO L226 Difference]: Without dead ends: 799 [2022-07-22 00:36:20,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1863, Invalid=9909, Unknown=0, NotChecked=0, Total=11772 [2022-07-22 00:36:20,962 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 790 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:20,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 127 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 00:36:20,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-07-22 00:36:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 309. [2022-07-22 00:36:21,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 257 states have (on average 1.2140077821011672) internal successors, (312), 258 states have internal predecessors, (312), 50 states have call successors, (50), 50 states have call predecessors, (50), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:21,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 362 transitions. [2022-07-22 00:36:21,004 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 362 transitions. Word has length 39 [2022-07-22 00:36:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:21,004 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 362 transitions. [2022-07-22 00:36:21,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.8) internal successors, (84), 19 states have internal predecessors, (84), 15 states have call successors, (17), 15 states have call predecessors, (17), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 362 transitions. [2022-07-22 00:36:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 00:36:21,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:21,006 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 6, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-22 00:36:21,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:21,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 00:36:21,219 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:21,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1678937939, now seen corresponding path program 3 times [2022-07-22 00:36:21,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:21,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689148920] [2022-07-22 00:36:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 70 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 00:36:21,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689148920] [2022-07-22 00:36:21,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689148920] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:21,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006570491] [2022-07-22 00:36:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:36:21,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:21,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:21,293 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:21,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 00:36:21,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 00:36:21,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 00:36:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:21,350 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 00:36:21,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 00:36:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006570491] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:21,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:21,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 14 [2022-07-22 00:36:21,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394493749] [2022-07-22 00:36:21,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:21,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 00:36:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 00:36:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-22 00:36:21,367 INFO L87 Difference]: Start difference. First operand 309 states and 362 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:21,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:21,492 INFO L93 Difference]: Finished difference Result 373 states and 436 transitions. [2022-07-22 00:36:21,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 00:36:21,492 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-22 00:36:21,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:21,493 INFO L225 Difference]: With dead ends: 373 [2022-07-22 00:36:21,493 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 00:36:21,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-07-22 00:36:21,496 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:21,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 00:36:21,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 00:36:21,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 120. [2022-07-22 00:36:21,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 19 states have call successors, (19), 19 states have call predecessors, (19), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2022-07-22 00:36:21,528 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 51 [2022-07-22 00:36:21,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:21,528 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2022-07-22 00:36:21,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 9 states have internal predecessors, (49), 7 states have call successors, (11), 7 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:21,528 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2022-07-22 00:36:21,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 00:36:21,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:21,529 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:21,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:21,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 00:36:21,745 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:21,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1889993342, now seen corresponding path program 4 times [2022-07-22 00:36:21,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475071282] [2022-07-22 00:36:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:21,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475071282] [2022-07-22 00:36:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475071282] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287074780] [2022-07-22 00:36:21,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:36:21,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:21,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:21,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:21,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 00:36:21,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:36:21,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:21,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 00:36:21,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:22,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:22,431 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:22,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287074780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:22,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:22,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 43 [2022-07-22 00:36:22,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491981757] [2022-07-22 00:36:22,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:22,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 00:36:22,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:22,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 00:36:22,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1626, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 00:36:22,434 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:23,676 INFO L93 Difference]: Finished difference Result 247 states and 263 transitions. [2022-07-22 00:36:23,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-22 00:36:23,682 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 00:36:23,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:23,684 INFO L225 Difference]: With dead ends: 247 [2022-07-22 00:36:23,684 INFO L226 Difference]: Without dead ends: 246 [2022-07-22 00:36:23,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2303, Invalid=9907, Unknown=0, NotChecked=0, Total=12210 [2022-07-22 00:36:23,691 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 787 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:23,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 72 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:36:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-22 00:36:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 240. [2022-07-22 00:36:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 200 states have (on average 1.03) internal successors, (206), 200 states have internal predecessors, (206), 39 states have call successors, (39), 39 states have call predecessors, (39), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2022-07-22 00:36:23,722 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 63 [2022-07-22 00:36:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2022-07-22 00:36:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 2.5365853658536586) internal successors, (104), 24 states have internal predecessors, (104), 20 states have call successors, (20), 20 states have call predecessors, (20), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2022-07-22 00:36:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 00:36:23,723 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:23,723 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-07-22 00:36:23,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:23,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 00:36:23,932 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2051033654, now seen corresponding path program 2 times [2022-07-22 00:36:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980807352] [2022-07-22 00:36:23,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:23,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:24,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:24,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980807352] [2022-07-22 00:36:24,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980807352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:24,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610798837] [2022-07-22 00:36:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 00:36:24,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:24,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:24,201 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:24,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 00:36:24,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 00:36:24,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:24,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 00:36:24,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:24,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:24,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610798837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:24,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:24,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 55 [2022-07-22 00:36:24,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418525479] [2022-07-22 00:36:24,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:24,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 00:36:24,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:24,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 00:36:24,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 00:36:24,813 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:25,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:25,600 INFO L93 Difference]: Finished difference Result 280 states and 287 transitions. [2022-07-22 00:36:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 00:36:25,600 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-22 00:36:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:25,602 INFO L225 Difference]: With dead ends: 280 [2022-07-22 00:36:25,602 INFO L226 Difference]: Without dead ends: 279 [2022-07-22 00:36:25,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1350, Invalid=7392, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 00:36:25,605 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:25,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 205 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:36:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-22 00:36:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 270. [2022-07-22 00:36:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 44 states have call successors, (44), 44 states have call predecessors, (44), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-07-22 00:36:25,641 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 81 [2022-07-22 00:36:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:25,641 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-07-22 00:36:25,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 2.5283018867924527) internal successors, (134), 30 states have internal predecessors, (134), 26 states have call successors, (26), 26 states have call predecessors, (26), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:25,642 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-07-22 00:36:25,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-22 00:36:25,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:25,643 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:25,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:25,864 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash -925511303, now seen corresponding path program 5 times [2022-07-22 00:36:25,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:25,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197593128] [2022-07-22 00:36:25,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:25,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197593128] [2022-07-22 00:36:26,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197593128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912544949] [2022-07-22 00:36:26,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:36:26,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:26,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:26,388 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:26,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 00:36:26,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-22 00:36:26,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 00:36:26,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:26,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1181 backedges. 0 proven. 1181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:27,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912544949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:27,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:27,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 87 [2022-07-22 00:36:27,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649152081] [2022-07-22 00:36:27,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:27,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-22 00:36:27,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:27,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-22 00:36:27,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1016, Invalid=6640, Unknown=0, NotChecked=0, Total=7656 [2022-07-22 00:36:27,679 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:31,409 INFO L93 Difference]: Finished difference Result 496 states and 526 transitions. [2022-07-22 00:36:31,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-07-22 00:36:31,410 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2022-07-22 00:36:31,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:31,411 INFO L225 Difference]: With dead ends: 496 [2022-07-22 00:36:31,412 INFO L226 Difference]: Without dead ends: 495 [2022-07-22 00:36:31,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16581 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9505, Invalid=41797, Unknown=0, NotChecked=0, Total=51302 [2022-07-22 00:36:31,415 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1269 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:31,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1269 Valid, 108 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 00:36:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-22 00:36:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 486. [2022-07-22 00:36:31,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 405 states have (on average 1.0222222222222221) internal successors, (414), 405 states have internal predecessors, (414), 80 states have call successors, (80), 80 states have call predecessors, (80), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 494 transitions. [2022-07-22 00:36:31,465 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 494 transitions. Word has length 129 [2022-07-22 00:36:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:31,465 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 494 transitions. [2022-07-22 00:36:31,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 85 states have (on average 2.5176470588235293) internal successors, (214), 46 states have internal predecessors, (214), 42 states have call successors, (42), 42 states have call predecessors, (42), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 494 transitions. [2022-07-22 00:36:31,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-22 00:36:31,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:31,467 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1] [2022-07-22 00:36:31,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:31,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:31,684 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1310081852, now seen corresponding path program 3 times [2022-07-22 00:36:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:31,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500129455] [2022-07-22 00:36:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:31,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500129455] [2022-07-22 00:36:32,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500129455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921800858] [2022-07-22 00:36:32,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 00:36:32,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:32,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:32,466 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:32,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 00:36:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-07-22 00:36:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:32,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 00:36:32,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:32,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:32,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:34,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921800858] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:34,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:34,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2022-07-22 00:36:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928304387] [2022-07-22 00:36:34,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:34,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-07-22 00:36:34,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-07-22 00:36:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=10804, Unknown=0, NotChecked=0, Total=12432 [2022-07-22 00:36:34,419 INFO L87 Difference]: Start difference. First operand 486 states and 494 transitions. Second operand has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:36,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:36,751 INFO L93 Difference]: Finished difference Result 578 states and 592 transitions. [2022-07-22 00:36:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-07-22 00:36:36,751 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 165 [2022-07-22 00:36:36,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:36,763 INFO L225 Difference]: With dead ends: 578 [2022-07-22 00:36:36,763 INFO L226 Difference]: Without dead ends: 577 [2022-07-22 00:36:36,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11021 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=5438, Invalid=31234, Unknown=0, NotChecked=0, Total=36672 [2022-07-22 00:36:36,766 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 790 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:36,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 331 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 00:36:36,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-07-22 00:36:36,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 564. [2022-07-22 00:36:36,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 470 states have (on average 1.0170212765957447) internal successors, (478), 470 states have internal predecessors, (478), 93 states have call successors, (93), 93 states have call predecessors, (93), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 571 transitions. [2022-07-22 00:36:36,829 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 571 transitions. Word has length 165 [2022-07-22 00:36:36,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:36,830 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 571 transitions. [2022-07-22 00:36:36,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 109 states have (on average 2.5137614678899083) internal successors, (274), 58 states have internal predecessors, (274), 54 states have call successors, (54), 54 states have call predecessors, (54), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:36,830 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 571 transitions. [2022-07-22 00:36:36,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-07-22 00:36:36,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:36,832 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:36:36,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:37,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:37,050 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885854, now seen corresponding path program 6 times [2022-07-22 00:36:37,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:37,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089408669] [2022-07-22 00:36:37,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:37,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:36:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:36:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089408669] [2022-07-22 00:36:38,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089408669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:36:38,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795661850] [2022-07-22 00:36:38,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 00:36:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:36:38,794 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:36:38,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 00:36:38,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2022-07-22 00:36:38,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:36:38,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-22 00:36:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:36:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:39,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:36:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 5003 backedges. 0 proven. 5003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:36:42,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795661850] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:36:42,909 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:36:42,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 171 [2022-07-22 00:36:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407799895] [2022-07-22 00:36:42,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:36:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-07-22 00:36:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:36:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-07-22 00:36:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3786, Invalid=25626, Unknown=0, NotChecked=0, Total=29412 [2022-07-22 00:36:42,913 INFO L87 Difference]: Start difference. First operand 564 states and 571 transitions. Second operand has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:58,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:36:58,351 INFO L93 Difference]: Finished difference Result 1026 states and 1090 transitions. [2022-07-22 00:36:58,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 379 states. [2022-07-22 00:36:58,352 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 255 [2022-07-22 00:36:58,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:36:58,355 INFO L225 Difference]: With dead ends: 1026 [2022-07-22 00:36:58,355 INFO L226 Difference]: Without dead ends: 1025 [2022-07-22 00:36:58,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 885 GetRequests, 424 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70684 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=39231, Invalid=174675, Unknown=0, NotChecked=0, Total=213906 [2022-07-22 00:36:58,366 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 5036 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5036 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 00:36:58,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5036 Valid, 131 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 00:36:58,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-07-22 00:36:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 1008. [2022-07-22 00:36:58,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 840 states have (on average 1.0202380952380952) internal successors, (857), 840 states have internal predecessors, (857), 167 states have call successors, (167), 167 states have call predecessors, (167), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:58,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1024 transitions. [2022-07-22 00:36:58,485 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1024 transitions. Word has length 255 [2022-07-22 00:36:58,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:36:58,485 INFO L495 AbstractCegarLoop]: Abstraction has 1008 states and 1024 transitions. [2022-07-22 00:36:58,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 169 states have (on average 2.5088757396449703) internal successors, (424), 88 states have internal predecessors, (424), 84 states have call successors, (84), 84 states have call predecessors, (84), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:36:58,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1024 transitions. [2022-07-22 00:36:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-22 00:36:58,489 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:36:58,489 INFO L195 NwaCegarLoop]: trace histogram [55, 55, 55, 55, 54, 54, 1, 1, 1, 1, 1] [2022-07-22 00:36:58,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 00:36:58,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:36:58,704 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:36:58,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:36:58,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1347688376, now seen corresponding path program 4 times [2022-07-22 00:36:58,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:36:58,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56268203] [2022-07-22 00:36:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:36:58,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:36:58,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:37:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:01,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:37:01,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56268203] [2022-07-22 00:37:01,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56268203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:37:01,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699387558] [2022-07-22 00:37:01,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 00:37:01,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:37:01,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:37:01,646 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:37:01,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 00:37:01,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 00:37:01,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:37:01,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-22 00:37:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:37:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:02,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:37:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8856 backedges. 0 proven. 8856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699387558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:37:08,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:37:08,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112, 112] total 223 [2022-07-22 00:37:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937999014] [2022-07-22 00:37:08,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:37:08,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 224 states [2022-07-22 00:37:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:37:08,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 224 interpolants. [2022-07-22 00:37:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6388, Invalid=43564, Unknown=0, NotChecked=0, Total=49952 [2022-07-22 00:37:08,140 INFO L87 Difference]: Start difference. First operand 1008 states and 1024 transitions. Second operand has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:37:16,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:37:16,930 INFO L93 Difference]: Finished difference Result 1178 states and 1206 transitions. [2022-07-22 00:37:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-22 00:37:16,931 INFO L78 Accepts]: Start accepts. Automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 333 [2022-07-22 00:37:16,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:37:16,936 INFO L225 Difference]: With dead ends: 1178 [2022-07-22 00:37:16,936 INFO L226 Difference]: Without dead ends: 1177 [2022-07-22 00:37:16,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 386 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47463 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=21846, Invalid=128310, Unknown=0, NotChecked=0, Total=150156 [2022-07-22 00:37:16,945 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1915 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1915 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 00:37:16,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1915 Valid, 602 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 00:37:16,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-07-22 00:37:17,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1158. [2022-07-22 00:37:17,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1158 states, 965 states have (on average 1.0145077720207254) internal successors, (979), 965 states have internal predecessors, (979), 192 states have call successors, (192), 192 states have call predecessors, (192), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:37:17,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1158 states to 1158 states and 1171 transitions. [2022-07-22 00:37:17,105 INFO L78 Accepts]: Start accepts. Automaton has 1158 states and 1171 transitions. Word has length 333 [2022-07-22 00:37:17,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:37:17,105 INFO L495 AbstractCegarLoop]: Abstraction has 1158 states and 1171 transitions. [2022-07-22 00:37:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 224 states, 221 states have (on average 2.506787330316742) internal successors, (554), 114 states have internal predecessors, (554), 110 states have call successors, (110), 110 states have call predecessors, (110), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:37:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1158 states and 1171 transitions. [2022-07-22 00:37:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2022-07-22 00:37:17,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:37:17,116 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 84, 84, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:37:17,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 00:37:17,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:37:17,334 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:37:17,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:37:17,334 INFO L85 PathProgramCache]: Analyzing trace with hash -14550343, now seen corresponding path program 7 times [2022-07-22 00:37:17,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:37:17,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696711825] [2022-07-22 00:37:17,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:37:17,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:37:17,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:37:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:23,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:37:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696711825] [2022-07-22 00:37:23,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696711825] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:37:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135491041] [2022-07-22 00:37:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 00:37:23,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:37:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:37:23,621 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:37:23,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 00:37:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:37:23,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 172 conjunts are in the unsatisfiable core [2022-07-22 00:37:23,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:37:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:24,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:37:38,329 INFO L134 CoverageAnalysis]: Checked inductivity of 21085 backedges. 0 proven. 21085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:37:38,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135491041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:37:38,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:37:38,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [172, 172, 172] total 343 [2022-07-22 00:37:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95012332] [2022-07-22 00:37:38,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:37:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 344 states [2022-07-22 00:37:38,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:37:38,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 344 interpolants. [2022-07-22 00:37:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14968, Invalid=103024, Unknown=0, NotChecked=0, Total=117992 [2022-07-22 00:37:38,340 INFO L87 Difference]: Start difference. First operand 1158 states and 1171 transitions. Second operand has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:38:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:38:40,930 INFO L93 Difference]: Finished difference Result 2054 states and 2180 transitions. [2022-07-22 00:38:40,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 759 states. [2022-07-22 00:38:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2022-07-22 00:38:40,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:38:40,936 INFO L225 Difference]: With dead ends: 2054 [2022-07-22 00:38:40,936 INFO L226 Difference]: Without dead ends: 2053 [2022-07-22 00:38:40,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1783 GetRequests, 854 SyntacticMatches, 0 SemanticMatches, 929 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302085 ImplicationChecksByTransitivity, 67.6s TimeCoverageRelationStatistics Valid=158113, Invalid=707717, Unknown=0, NotChecked=0, Total=865830 [2022-07-22 00:38:40,975 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 7699 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7699 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 00:38:40,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7699 Valid, 186 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 00:38:40,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2022-07-22 00:38:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 2022. [2022-07-22 00:38:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2022 states, 1685 states have (on average 1.0183976261127596) internal successors, (1716), 1685 states have internal predecessors, (1716), 336 states have call successors, (336), 336 states have call predecessors, (336), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:38:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2022 states to 2022 states and 2052 transitions. [2022-07-22 00:38:41,179 INFO L78 Accepts]: Start accepts. Automaton has 2022 states and 2052 transitions. Word has length 513 [2022-07-22 00:38:41,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:38:41,180 INFO L495 AbstractCegarLoop]: Abstraction has 2022 states and 2052 transitions. [2022-07-22 00:38:41,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 344 states, 341 states have (on average 2.504398826979472) internal successors, (854), 174 states have internal predecessors, (854), 170 states have call successors, (170), 170 states have call predecessors, (170), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:38:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2022 states and 2052 transitions. [2022-07-22 00:38:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2022-07-22 00:38:41,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:38:41,184 INFO L195 NwaCegarLoop]: trace histogram [111, 111, 111, 111, 110, 110, 1, 1, 1, 1, 1] [2022-07-22 00:38:41,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 00:38:41,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:38:41,403 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:38:41,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:38:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2066219424, now seen corresponding path program 5 times [2022-07-22 00:38:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:38:41,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841750517] [2022-07-22 00:38:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:38:41,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:38:41,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 00:38:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:38:51,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 00:38:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841750517] [2022-07-22 00:38:51,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841750517] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 00:38:51,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563086254] [2022-07-22 00:38:51,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 00:38:51,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 00:38:51,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 00:38:51,081 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 00:38:51,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 00:38:52,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 111 check-sat command(s) [2022-07-22 00:38:52,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 00:38:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 224 conjunts are in the unsatisfiable core [2022-07-22 00:38:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 00:38:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:38:52,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 00:39:16,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36520 backedges. 0 proven. 36520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 00:39:16,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563086254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 00:39:16,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 00:39:16,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [224, 224, 224] total 447 [2022-07-22 00:39:16,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713978226] [2022-07-22 00:39:16,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 00:39:16,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 448 states [2022-07-22 00:39:16,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 00:39:16,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 448 interpolants. [2022-07-22 00:39:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25316, Invalid=174940, Unknown=0, NotChecked=0, Total=200256 [2022-07-22 00:39:16,064 INFO L87 Difference]: Start difference. First operand 2022 states and 2052 transitions. Second operand has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:39:55,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 00:39:55,380 INFO L93 Difference]: Finished difference Result 2374 states and 2430 transitions. [2022-07-22 00:39:55,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 557 states. [2022-07-22 00:39:55,381 INFO L78 Accepts]: Start accepts. Automaton has has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 669 [2022-07-22 00:39:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 00:39:55,389 INFO L225 Difference]: With dead ends: 2374 [2022-07-22 00:39:55,390 INFO L226 Difference]: Without dead ends: 2373 [2022-07-22 00:39:55,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1892 GetRequests, 1114 SyntacticMatches, 0 SemanticMatches, 778 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196787 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=87590, Invalid=520030, Unknown=0, NotChecked=0, Total=607620 [2022-07-22 00:39:55,422 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4926 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1745 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4926 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 00:39:55,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4926 Valid, 1060 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1745 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 00:39:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2373 states. [2022-07-22 00:39:55,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2373 to 2340. [2022-07-22 00:39:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2340 states, 1950 states have (on average 1.0143589743589743) internal successors, (1978), 1950 states have internal predecessors, (1978), 389 states have call successors, (389), 389 states have call predecessors, (389), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:39:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2340 states to 2340 states and 2367 transitions. [2022-07-22 00:39:55,684 INFO L78 Accepts]: Start accepts. Automaton has 2340 states and 2367 transitions. Word has length 669 [2022-07-22 00:39:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 00:39:55,685 INFO L495 AbstractCegarLoop]: Abstraction has 2340 states and 2367 transitions. [2022-07-22 00:39:55,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 448 states, 445 states have (on average 2.5033707865168537) internal successors, (1114), 226 states have internal predecessors, (1114), 222 states have call successors, (222), 222 states have call predecessors, (222), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 00:39:55,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2340 states and 2367 transitions. [2022-07-22 00:39:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2022-07-22 00:39:55,693 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 00:39:55,694 INFO L195 NwaCegarLoop]: trace histogram [170, 170, 169, 169, 168, 168, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 00:39:55,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 00:39:55,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-22 00:39:55,907 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [fErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, fErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2022-07-22 00:39:55,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 00:39:55,908 INFO L85 PathProgramCache]: Analyzing trace with hash -2144916318, now seen corresponding path program 8 times [2022-07-22 00:39:55,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 00:39:55,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981969679] [2022-07-22 00:39:55,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 00:39:55,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 00:39:57,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat