./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 14:31:49,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 14:31:49,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 14:31:50,003 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 14:31:50,003 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 14:31:50,004 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 14:31:50,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 14:31:50,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 14:31:50,008 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 14:31:50,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 14:31:50,009 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 14:31:50,010 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 14:31:50,010 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 14:31:50,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 14:31:50,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 14:31:50,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 14:31:50,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 14:31:50,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 14:31:50,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 14:31:50,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 14:31:50,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 14:31:50,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 14:31:50,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 14:31:50,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 14:31:50,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 14:31:50,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 14:31:50,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 14:31:50,033 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 14:31:50,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 14:31:50,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 14:31:50,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 14:31:50,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 14:31:50,035 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 14:31:50,036 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 14:31:50,037 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 14:31:50,037 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 14:31:50,038 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 14:31:50,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 14:31:50,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 14:31:50,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 14:31:50,039 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 14:31:50,040 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-64bit-Automizer_Default.epf [2021-12-19 14:31:50,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 14:31:50,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 14:31:50,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 14:31:50,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 14:31:50,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-19 14:31:50,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-19 14:31:50,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 14:31:50,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 14:31:50,061 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 14:31:50,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 14:31:50,061 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 14:31:50,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 14:31:50,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 14:31:50,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-19 14:31:50,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-19 14:31:50,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-19 14:31:50,063 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-12-19 14:31:50,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 14:31:50,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 14:31:50,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-19 14:31:50,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 14:31:50,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 14:31:50,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-19 14:31:50,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:31:50,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 14:31:50,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-19 14:31:50,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-19 14:31:50,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 14:31:50,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-19 14:31:50,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-19 14:31:50,066 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 14:31:50,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 422ea435de955cc6e58e578076c5ef733a2456157ad413df035d109cb231427a [2021-12-19 14:31:50,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 14:31:50,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 14:31:50,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 14:31:50,281 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 14:31:50,282 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 14:31:50,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-19 14:31:50,343 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e34adbe5/f777bfffd42a4e948db6fa586d50a23e/FLAGf7f080bd3 [2021-12-19 14:31:50,679 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 14:31:50,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2021-12-19 14:31:50,684 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e34adbe5/f777bfffd42a4e948db6fa586d50a23e/FLAGf7f080bd3 [2021-12-19 14:31:51,100 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e34adbe5/f777bfffd42a4e948db6fa586d50a23e [2021-12-19 14:31:51,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 14:31:51,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 14:31:51,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 14:31:51,105 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 14:31:51,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 14:31:51,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59b96384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51, skipping insertion in model container [2021-12-19 14:31:51,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 14:31:51,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 14:31:51,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:31:51,224 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 14:31:51,239 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 14:31:51,246 INFO L208 MainTranslator]: Completed translation [2021-12-19 14:31:51,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51 WrapperNode [2021-12-19 14:31:51,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 14:31:51,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 14:31:51,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 14:31:51,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 14:31:51,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,269 INFO L137 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 11 [2021-12-19 14:31:51,269 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 14:31:51,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 14:31:51,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 14:31:51,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 14:31:51,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,278 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,278 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 14:31:51,280 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 14:31:51,280 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 14:31:51,280 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 14:31:51,280 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (1/1) ... [2021-12-19 14:31:51,285 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-19 14:31:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:51,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-19 14:31:51,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-19 14:31:51,351 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-12-19 14:31:51,351 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-12-19 14:31:51,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 14:31:51,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 14:31:51,386 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 14:31:51,387 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 14:31:51,463 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 14:31:51,468 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 14:31:51,468 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 14:31:51,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:31:51 BoogieIcfgContainer [2021-12-19 14:31:51,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 14:31:51,470 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-19 14:31:51,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-19 14:31:51,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-19 14:31:51,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 02:31:51" (1/3) ... [2021-12-19 14:31:51,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c02289e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:31:51, skipping insertion in model container [2021-12-19 14:31:51,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 02:31:51" (2/3) ... [2021-12-19 14:31:51,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c02289e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 02:31:51, skipping insertion in model container [2021-12-19 14:31:51,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 02:31:51" (3/3) ... [2021-12-19 14:31:51,475 INFO L111 eAbstractionObserver]: Analyzing ICFG NestedRecursion_2b.c [2021-12-19 14:31:51,478 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-19 14:31:51,478 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-12-19 14:31:51,509 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-19 14:31:51,519 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-19 14:31:51,519 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-12-19 14:31:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-19 14:31:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-19 14:31:51,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:51,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:51,536 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:51,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1134721268, now seen corresponding path program 1 times [2021-12-19 14:31:51,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:51,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569390427] [2021-12-19 14:31:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:51,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:51,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:51,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569390427] [2021-12-19 14:31:51,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569390427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:51,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:51,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:31:51,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349364742] [2021-12-19 14:31:51,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:51,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:31:51,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:51,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:31:51,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:31:51,743 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:51,854 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-19 14:31:51,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:31:51,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-19 14:31:51,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:51,863 INFO L225 Difference]: With dead ends: 42 [2021-12-19 14:31:51,863 INFO L226 Difference]: Without dead ends: 37 [2021-12-19 14:31:51,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:31:51,870 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:51,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 67 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:51,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-19 14:31:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2021-12-19 14:31:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 25 states have internal predecessors, (30), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 14:31:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2021-12-19 14:31:51,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 7 [2021-12-19 14:31:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2021-12-19 14:31:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2021-12-19 14:31:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-19 14:31:51,902 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:51,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:51,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-19 14:31:51,902 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:51,905 INFO L85 PathProgramCache]: Analyzing trace with hash 816620978, now seen corresponding path program 1 times [2021-12-19 14:31:51,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:51,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024909332] [2021-12-19 14:31:51,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:51,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:51,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:51,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024909332] [2021-12-19 14:31:51,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024909332] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:51,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:51,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-19 14:31:51,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910205644] [2021-12-19 14:31:51,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:51,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-19 14:31:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-19 14:31:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-19 14:31:51,952 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:52,005 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-12-19 14:31:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 14:31:52,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-19 14:31:52,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:52,007 INFO L225 Difference]: With dead ends: 51 [2021-12-19 14:31:52,007 INFO L226 Difference]: Without dead ends: 47 [2021-12-19 14:31:52,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:31:52,009 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:52,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:31:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-19 14:31:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-19 14:31:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 32 states have internal predecessors, (39), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-19 14:31:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2021-12-19 14:31:52,026 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 8 [2021-12-19 14:31:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:52,027 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2021-12-19 14:31:52,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:52,027 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2021-12-19 14:31:52,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-19 14:31:52,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:52,027 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:52,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-19 14:31:52,028 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:52,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash 496687761, now seen corresponding path program 1 times [2021-12-19 14:31:52,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338546212] [2021-12-19 14:31:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:52,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:52,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338546212] [2021-12-19 14:31:52,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338546212] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:52,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833743125] [2021-12-19 14:31:52,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:52,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:52,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:52,094 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:52,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-19 14:31:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 14:31:52,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:52,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:52,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833743125] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:52,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:52,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2021-12-19 14:31:52,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603497647] [2021-12-19 14:31:52,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:52,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-19 14:31:52,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:52,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-19 14:31:52,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-12-19 14:31:52,333 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:52,519 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2021-12-19 14:31:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-19 14:31:52,519 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-19 14:31:52,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:52,521 INFO L225 Difference]: With dead ends: 96 [2021-12-19 14:31:52,522 INFO L226 Difference]: Without dead ends: 95 [2021-12-19 14:31:52,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-12-19 14:31:52,524 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:52,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 116 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:52,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-19 14:31:52,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-12-19 14:31:52,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 59 states have internal predecessors, (75), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-19 14:31:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 99 transitions. [2021-12-19 14:31:52,550 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 99 transitions. Word has length 13 [2021-12-19 14:31:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:52,551 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 99 transitions. [2021-12-19 14:31:52,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 99 transitions. [2021-12-19 14:31:52,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-19 14:31:52,551 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:52,551 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:52,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-19 14:31:52,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:52,756 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 574996991, now seen corresponding path program 1 times [2021-12-19 14:31:52,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858231943] [2021-12-19 14:31:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:52,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:52,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:52,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858231943] [2021-12-19 14:31:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858231943] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:52,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:52,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-19 14:31:52,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868858303] [2021-12-19 14:31:52,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:52,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-19 14:31:52,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-19 14:31:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 14:31:52,797 INFO L87 Difference]: Start difference. First operand 77 states and 99 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:52,816 INFO L93 Difference]: Finished difference Result 117 states and 166 transitions. [2021-12-19 14:31:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-19 14:31:52,817 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-19 14:31:52,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:52,819 INFO L225 Difference]: With dead ends: 117 [2021-12-19 14:31:52,819 INFO L226 Difference]: Without dead ends: 116 [2021-12-19 14:31:52,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-19 14:31:52,820 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:52,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 52 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:31:52,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-19 14:31:52,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-12-19 14:31:52,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 75 states have internal predecessors, (92), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-19 14:31:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 127 transitions. [2021-12-19 14:31:52,834 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 127 transitions. Word has length 15 [2021-12-19 14:31:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:52,834 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 127 transitions. [2021-12-19 14:31:52,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 127 transitions. [2021-12-19 14:31:52,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-19 14:31:52,835 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:52,835 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:52,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-19 14:31:52,835 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:52,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 645037581, now seen corresponding path program 1 times [2021-12-19 14:31:52,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344574181] [2021-12-19 14:31:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:52,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:52,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:52,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344574181] [2021-12-19 14:31:52,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344574181] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:52,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:52,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-19 14:31:52,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720101937] [2021-12-19 14:31:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:52,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-19 14:31:52,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:52,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-19 14:31:52,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 14:31:52,860 INFO L87 Difference]: Start difference. First operand 99 states and 127 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:52,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:52,868 INFO L93 Difference]: Finished difference Result 99 states and 127 transitions. [2021-12-19 14:31:52,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-19 14:31:52,868 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-12-19 14:31:52,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:52,870 INFO L225 Difference]: With dead ends: 99 [2021-12-19 14:31:52,870 INFO L226 Difference]: Without dead ends: 98 [2021-12-19 14:31:52,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-19 14:31:52,871 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:52,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:31:52,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-19 14:31:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-19 14:31:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 74 states have internal predecessors, (86), 13 states have call successors, (13), 6 states have call predecessors, (13), 10 states have return successors, (22), 17 states have call predecessors, (22), 11 states have call successors, (22) [2021-12-19 14:31:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 121 transitions. [2021-12-19 14:31:52,883 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 121 transitions. Word has length 16 [2021-12-19 14:31:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 121 transitions. [2021-12-19 14:31:52,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 121 transitions. [2021-12-19 14:31:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-12-19 14:31:52,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:52,884 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:52,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-19 14:31:52,885 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1915238450, now seen corresponding path program 1 times [2021-12-19 14:31:52,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743080433] [2021-12-19 14:31:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:52,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:52,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:52,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:52,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743080433] [2021-12-19 14:31:52,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743080433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:52,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:52,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 14:31:52,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474632514] [2021-12-19 14:31:52,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:52,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-19 14:31:52,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:52,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 14:31:52,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:31:52,954 INFO L87 Difference]: Start difference. First operand 98 states and 121 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:53,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:53,050 INFO L93 Difference]: Finished difference Result 137 states and 175 transitions. [2021-12-19 14:31:53,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-19 14:31:53,050 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-12-19 14:31:53,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:53,052 INFO L225 Difference]: With dead ends: 137 [2021-12-19 14:31:53,052 INFO L226 Difference]: Without dead ends: 136 [2021-12-19 14:31:53,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-19 14:31:53,053 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:53,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:53,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-12-19 14:31:53,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 128. [2021-12-19 14:31:53,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 91 states have (on average 1.1868131868131868) internal successors, (108), 100 states have internal predecessors, (108), 22 states have call successors, (22), 7 states have call predecessors, (22), 12 states have return successors, (38), 20 states have call predecessors, (38), 19 states have call successors, (38) [2021-12-19 14:31:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2021-12-19 14:31:53,069 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 20 [2021-12-19 14:31:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:53,069 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2021-12-19 14:31:53,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2021-12-19 14:31:53,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-19 14:31:53,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:53,071 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:53,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-19 14:31:53,071 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:53,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash 757150232, now seen corresponding path program 1 times [2021-12-19 14:31:53,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598057292] [2021-12-19 14:31:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:53,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:53,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:53,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:53,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:53,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598057292] [2021-12-19 14:31:53,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598057292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 14:31:53,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 14:31:53,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 14:31:53,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240118051] [2021-12-19 14:31:53,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 14:31:53,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-19 14:31:53,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:53,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 14:31:53,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-19 14:31:53,111 INFO L87 Difference]: Start difference. First operand 128 states and 168 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:53,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:53,162 INFO L93 Difference]: Finished difference Result 149 states and 199 transitions. [2021-12-19 14:31:53,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-19 14:31:53,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-12-19 14:31:53,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:53,164 INFO L225 Difference]: With dead ends: 149 [2021-12-19 14:31:53,164 INFO L226 Difference]: Without dead ends: 78 [2021-12-19 14:31:53,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-19 14:31:53,167 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:53,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 61 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-19 14:31:53,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-19 14:31:53,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 43. [2021-12-19 14:31:53,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.15625) internal successors, (37), 35 states have internal predecessors, (37), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 14:31:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2021-12-19 14:31:53,172 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 21 [2021-12-19 14:31:53,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:53,172 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2021-12-19 14:31:53,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 14:31:53,172 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2021-12-19 14:31:53,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-19 14:31:53,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:53,173 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:53,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-19 14:31:53,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:53,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:53,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1579949547, now seen corresponding path program 2 times [2021-12-19 14:31:53,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:53,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554471925] [2021-12-19 14:31:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:53,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:53,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:53,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554471925] [2021-12-19 14:31:53,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554471925] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:53,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807761609] [2021-12-19 14:31:53,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:31:53,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:53,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:53,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:53,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-19 14:31:53,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:31:53,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:31:53,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-19 14:31:53,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:53,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:53,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:53,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807761609] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:53,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:53,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-19 14:31:53,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377753218] [2021-12-19 14:31:53,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:53,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-19 14:31:53,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:53,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-19 14:31:53,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-19 14:31:53,398 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:31:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:53,584 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2021-12-19 14:31:53,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-19 14:31:53,585 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-19 14:31:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:53,586 INFO L225 Difference]: With dead ends: 93 [2021-12-19 14:31:53,586 INFO L226 Difference]: Without dead ends: 77 [2021-12-19 14:31:53,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2021-12-19 14:31:53,587 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 53 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:53,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 92 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:53,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-19 14:31:53,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 48. [2021-12-19 14:31:53,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 39 states have internal predecessors, (41), 7 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 1 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-19 14:31:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-19 14:31:53,593 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 26 [2021-12-19 14:31:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:53,593 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-19 14:31:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:31:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-19 14:31:53,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-19 14:31:53,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:53,595 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 1, 1, 1, 1, 1] [2021-12-19 14:31:53,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-19 14:31:53,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-19 14:31:53,812 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1990306702, now seen corresponding path program 2 times [2021-12-19 14:31:53,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:53,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168297433] [2021-12-19 14:31:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:53,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:53,892 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:53,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:53,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168297433] [2021-12-19 14:31:53,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168297433] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:53,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221818093] [2021-12-19 14:31:53,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:31:53,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:53,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:53,893 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:53,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-19 14:31:53,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:31:53,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:31:53,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-19 14:31:53,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:53,984 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:53,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:54,157 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:54,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221818093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:54,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:54,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2021-12-19 14:31:54,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078344334] [2021-12-19 14:31:54,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:54,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-19 14:31:54,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:54,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-19 14:31:54,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-12-19 14:31:54,162 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:54,434 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2021-12-19 14:31:54,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-12-19 14:31:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-19 14:31:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:54,435 INFO L225 Difference]: With dead ends: 148 [2021-12-19 14:31:54,435 INFO L226 Difference]: Without dead ends: 147 [2021-12-19 14:31:54,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=554, Invalid=1252, Unknown=0, NotChecked=0, Total=1806 [2021-12-19 14:31:54,443 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 312 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:54,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 116 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-12-19 14:31:54,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 90. [2021-12-19 14:31:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 75 states have internal predecessors, (77), 13 states have call successors, (13), 13 states have call predecessors, (13), 10 states have return successors, (10), 1 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-19 14:31:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2021-12-19 14:31:54,449 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 28 [2021-12-19 14:31:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2021-12-19 14:31:54,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 14 states have internal predecessors, (44), 10 states have call successors, (10), 10 states have call predecessors, (10), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2021-12-19 14:31:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-19 14:31:54,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:54,451 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 14:31:54,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-19 14:31:54,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:54,668 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1862709720, now seen corresponding path program 3 times [2021-12-19 14:31:54,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:54,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129235627] [2021-12-19 14:31:54,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:54,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 14:31:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:54,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129235627] [2021-12-19 14:31:54,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129235627] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:54,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582382791] [2021-12-19 14:31:54,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:31:54,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:54,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:54,779 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:54,781 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-19 14:31:54,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-19 14:31:54,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:31:54,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-19 14:31:54,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:54,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 34 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-19 14:31:55,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582382791] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:55,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:55,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-19 14:31:55,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779392246] [2021-12-19 14:31:55,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:55,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-19 14:31:55,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-19 14:31:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-12-19 14:31:55,085 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:31:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:55,223 INFO L93 Difference]: Finished difference Result 122 states and 135 transitions. [2021-12-19 14:31:55,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-19 14:31:55,223 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2021-12-19 14:31:55,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:55,224 INFO L225 Difference]: With dead ends: 122 [2021-12-19 14:31:55,224 INFO L226 Difference]: Without dead ends: 59 [2021-12-19 14:31:55,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2021-12-19 14:31:55,226 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:55,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 84 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-19 14:31:55,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-12-19 14:31:55,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 11 states have call successors, (11), 11 states have call predecessors, (11), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-12-19 14:31:55,234 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 41 [2021-12-19 14:31:55,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:55,234 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-12-19 14:31:55,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.28) internal successors, (57), 16 states have internal predecessors, (57), 11 states have call successors, (12), 11 states have call predecessors, (12), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-19 14:31:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-12-19 14:31:55,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-19 14:31:55,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:55,235 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-12-19 14:31:55,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-19 14:31:55,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:55,451 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:55,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash 235894418, now seen corresponding path program 3 times [2021-12-19 14:31:55,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:55,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898816111] [2021-12-19 14:31:55,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:55,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:55,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:55,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898816111] [2021-12-19 14:31:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898816111] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106882727] [2021-12-19 14:31:55,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-19 14:31:55,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:55,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:55,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-19 14:31:55,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-12-19 14:31:55,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:31:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-19 14:31:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:55,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:56,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106882727] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:56,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:56,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2021-12-19 14:31:56,284 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308877979] [2021-12-19 14:31:56,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:56,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-19 14:31:56,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:56,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-19 14:31:56,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=1700, Unknown=0, NotChecked=0, Total=2256 [2021-12-19 14:31:56,285 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:56,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:31:56,692 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2021-12-19 14:31:56,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-19 14:31:56,692 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-12-19 14:31:56,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:31:56,693 INFO L225 Difference]: With dead ends: 121 [2021-12-19 14:31:56,693 INFO L226 Difference]: Without dead ends: 120 [2021-12-19 14:31:56,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2021-12-19 14:31:56,699 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 226 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-19 14:31:56,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 48 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-19 14:31:56,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-19 14:31:56,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-12-19 14:31:56,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 23 states have call successors, (23), 23 states have call predecessors, (23), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:56,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-12-19 14:31:56,704 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 58 [2021-12-19 14:31:56,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:31:56,704 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-12-19 14:31:56,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 2.0444444444444443) internal successors, (92), 26 states have internal predecessors, (92), 22 states have call successors, (22), 22 states have call predecessors, (22), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:31:56,705 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-12-19 14:31:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-19 14:31:56,706 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:31:56,706 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 1, 1, 1, 1, 1] [2021-12-19 14:31:56,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-19 14:31:56,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-19 14:31:56,911 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:31:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:31:56,911 INFO L85 PathProgramCache]: Analyzing trace with hash -102214958, now seen corresponding path program 4 times [2021-12-19 14:31:56,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:31:56,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834012062] [2021-12-19 14:31:56,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:31:56,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:31:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:31:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:57,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:31:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834012062] [2021-12-19 14:31:57,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834012062] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:31:57,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922770199] [2021-12-19 14:31:57,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-19 14:31:57,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:31:57,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:31:57,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:31:57,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-19 14:31:57,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-19 14:31:57,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:31:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-19 14:31:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:31:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:57,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:31:59,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1243 backedges. 0 proven. 1243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:31:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922770199] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:31:59,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:31:59,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2021-12-19 14:31:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015070967] [2021-12-19 14:31:59,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:31:59,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-12-19 14:31:59,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:31:59,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-12-19 14:31:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2260, Invalid=6860, Unknown=0, NotChecked=0, Total=9120 [2021-12-19 14:31:59,477 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:32:00,891 INFO L93 Difference]: Finished difference Result 241 states and 264 transitions. [2021-12-19 14:32:00,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-19 14:32:00,891 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-19 14:32:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:32:00,893 INFO L225 Difference]: With dead ends: 241 [2021-12-19 14:32:00,893 INFO L226 Difference]: Without dead ends: 240 [2021-12-19 14:32:00,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4140 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5549, Invalid=14473, Unknown=0, NotChecked=0, Total=20022 [2021-12-19 14:32:00,898 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 793 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 793 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:32:00,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [793 Valid, 48 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-19 14:32:00,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-19 14:32:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-12-19 14:32:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 191 states have (on average 1.0052356020942408) internal successors, (192), 191 states have internal predecessors, (192), 47 states have call successors, (47), 47 states have call predecessors, (47), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:00,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-12-19 14:32:00,910 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 118 [2021-12-19 14:32:00,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:32:00,911 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-12-19 14:32:00,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 93 states have (on average 2.021505376344086) internal successors, (188), 50 states have internal predecessors, (188), 46 states have call successors, (46), 46 states have call predecessors, (46), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:00,912 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-12-19 14:32:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-12-19 14:32:00,915 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:32:00,915 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 1, 1, 1, 1, 1] [2021-12-19 14:32:00,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-19 14:32:01,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:32:01,132 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:32:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:32:01,132 INFO L85 PathProgramCache]: Analyzing trace with hash -827561134, now seen corresponding path program 5 times [2021-12-19 14:32:01,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:32:01,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324034315] [2021-12-19 14:32:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:32:01,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:32:01,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:32:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:03,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:32:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324034315] [2021-12-19 14:32:03,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324034315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:32:03,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419848300] [2021-12-19 14:32:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-19 14:32:03,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:32:03,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:32:03,400 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:32:03,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-19 14:32:03,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2021-12-19 14:32:03,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:32:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-19 14:32:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:32:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:32:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 0 proven. 5359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:09,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419848300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:32:09,582 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:32:09,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2021-12-19 14:32:09,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205913534] [2021-12-19 14:32:09,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:32:09,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2021-12-19 14:32:09,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:32:09,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2021-12-19 14:32:09,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9124, Invalid=27548, Unknown=0, NotChecked=0, Total=36672 [2021-12-19 14:32:09,593 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:15,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:32:15,128 INFO L93 Difference]: Finished difference Result 481 states and 528 transitions. [2021-12-19 14:32:15,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2021-12-19 14:32:15,160 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-12-19 14:32:15,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:32:15,161 INFO L225 Difference]: With dead ends: 481 [2021-12-19 14:32:15,161 INFO L226 Difference]: Without dead ends: 480 [2021-12-19 14:32:15,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 664 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17484 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=22613, Invalid=58897, Unknown=0, NotChecked=0, Total=81510 [2021-12-19 14:32:15,174 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 1634 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1634 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-19 14:32:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1634 Valid, 47 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-19 14:32:15,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-12-19 14:32:15,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 479. [2021-12-19 14:32:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 383 states have (on average 1.0026109660574412) internal successors, (384), 383 states have internal predecessors, (384), 95 states have call successors, (95), 95 states have call predecessors, (95), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 479 transitions. [2021-12-19 14:32:15,190 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 479 transitions. Word has length 238 [2021-12-19 14:32:15,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:32:15,190 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 479 transitions. [2021-12-19 14:32:15,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 189 states have (on average 2.0105820105820107) internal successors, (380), 98 states have internal predecessors, (380), 94 states have call successors, (94), 94 states have call predecessors, (94), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:32:15,191 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 479 transitions. [2021-12-19 14:32:15,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-12-19 14:32:15,196 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:32:15,197 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 94, 94, 1, 1, 1, 1, 1] [2021-12-19 14:32:15,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-19 14:32:15,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:32:15,405 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:32:15,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:32:15,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1782455378, now seen corresponding path program 6 times [2021-12-19 14:32:15,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:32:15,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755006576] [2021-12-19 14:32:15,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:32:15,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:32:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:32:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:23,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:32:23,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755006576] [2021-12-19 14:32:23,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755006576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:32:23,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33124642] [2021-12-19 14:32:23,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-19 14:32:23,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:32:23,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:32:23,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 14:32:23,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-19 14:32:24,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2021-12-19 14:32:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:32:24,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 192 conjunts are in the unsatisfiable core [2021-12-19 14:32:24,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:32:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:32:46,146 INFO L134 CoverageAnalysis]: Checked inductivity of 22231 backedges. 0 proven. 22231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:32:46,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33124642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:32:46,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:32:46,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2021-12-19 14:32:46,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263716943] [2021-12-19 14:32:46,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:32:46,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2021-12-19 14:32:46,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:32:46,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2021-12-19 14:32:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36676, Invalid=110396, Unknown=0, NotChecked=0, Total=147072 [2021-12-19 14:32:46,160 INFO L87 Difference]: Start difference. First operand 479 states and 479 transitions. Second operand has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:33:15,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:33:15,510 INFO L93 Difference]: Finished difference Result 961 states and 1056 transitions. [2021-12-19 14:33:15,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2021-12-19 14:33:15,511 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 478 [2021-12-19 14:33:15,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:33:15,516 INFO L225 Difference]: With dead ends: 961 [2021-12-19 14:33:15,516 INFO L226 Difference]: Without dead ends: 960 [2021-12-19 14:33:15,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1336 GetRequests, 764 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 42.6s TimeCoverageRelationStatistics Valid=91301, Invalid=237601, Unknown=0, NotChecked=0, Total=328902 [2021-12-19 14:33:15,544 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 3594 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3594 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-19 14:33:15,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3594 Valid, 64 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1728 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-19 14:33:15,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2021-12-19 14:33:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 959. [2021-12-19 14:33:15,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 767 states have (on average 1.001303780964798) internal successors, (768), 767 states have internal predecessors, (768), 191 states have call successors, (191), 191 states have call predecessors, (191), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:33:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 959 transitions. [2021-12-19 14:33:15,569 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 959 transitions. Word has length 478 [2021-12-19 14:33:15,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:33:15,569 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 959 transitions. [2021-12-19 14:33:15,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 381 states have (on average 2.005249343832021) internal successors, (764), 194 states have internal predecessors, (764), 190 states have call successors, (190), 190 states have call predecessors, (190), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:33:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 959 transitions. [2021-12-19 14:33:15,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 959 [2021-12-19 14:33:15,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:33:15,587 INFO L514 BasicCegarLoop]: trace histogram [191, 191, 191, 190, 190, 1, 1, 1, 1, 1] [2021-12-19 14:33:15,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-19 14:33:15,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-19 14:33:15,795 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:33:15,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:33:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1752727982, now seen corresponding path program 7 times [2021-12-19 14:33:15,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:33:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346686763] [2021-12-19 14:33:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:33:15,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:33:16,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:33:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:33:48,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:33:48,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346686763] [2021-12-19 14:33:48,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346686763] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:33:48,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50086642] [2021-12-19 14:33:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-19 14:33:48,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:33:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:33:48,646 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) [2021-12-19 14:33:48,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-19 14:33:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:33:48,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1725 conjuncts, 384 conjunts are in the unsatisfiable core [2021-12-19 14:33:48,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:33:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:33:50,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 14:35:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 90535 backedges. 0 proven. 90535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:35:16,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50086642] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 14:35:16,175 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 14:35:16,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [384, 384, 384] total 767 [2021-12-19 14:35:16,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895785053] [2021-12-19 14:35:16,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 14:35:16,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 768 states [2021-12-19 14:35:16,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 14:35:16,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 768 interpolants. [2021-12-19 14:35:16,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147076, Invalid=441980, Unknown=0, NotChecked=0, Total=589056 [2021-12-19 14:35:16,230 INFO L87 Difference]: Start difference. First operand 959 states and 959 transitions. Second operand has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:39:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 14:39:17,043 INFO L93 Difference]: Finished difference Result 1921 states and 2112 transitions. [2021-12-19 14:39:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 768 states. [2021-12-19 14:39:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 958 [2021-12-19 14:39:17,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-19 14:39:17,065 INFO L225 Difference]: With dead ends: 1921 [2021-12-19 14:39:17,065 INFO L226 Difference]: Without dead ends: 1920 [2021-12-19 14:39:17,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2680 GetRequests, 1532 SyntacticMatches, 0 SemanticMatches, 1148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291084 ImplicationChecksByTransitivity, 174.7s TimeCoverageRelationStatistics Valid=366917, Invalid=954433, Unknown=0, NotChecked=0, Total=1321350 [2021-12-19 14:39:17,159 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7850 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 3458 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7850 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-19 14:39:17,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7850 Valid, 68 Invalid, 3654 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [196 Valid, 3458 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-19 14:39:17,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1920 states. [2021-12-19 14:39:17,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1920 to 1919. [2021-12-19 14:39:17,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1535 states have (on average 1.0006514657980456) internal successors, (1536), 1535 states have internal predecessors, (1536), 383 states have call successors, (383), 383 states have call predecessors, (383), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:39:17,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 1919 transitions. [2021-12-19 14:39:17,206 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 1919 transitions. Word has length 958 [2021-12-19 14:39:17,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-19 14:39:17,207 INFO L470 AbstractCegarLoop]: Abstraction has 1919 states and 1919 transitions. [2021-12-19 14:39:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 768 states, 765 states have (on average 2.0026143790849673) internal successors, (1532), 386 states have internal predecessors, (1532), 382 states have call successors, (382), 382 states have call predecessors, (382), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 14:39:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 1919 transitions. [2021-12-19 14:39:17,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1919 [2021-12-19 14:39:17,227 INFO L506 BasicCegarLoop]: Found error trace [2021-12-19 14:39:17,227 INFO L514 BasicCegarLoop]: trace histogram [383, 383, 383, 382, 382, 1, 1, 1, 1, 1] [2021-12-19 14:39:17,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-19 14:39:17,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-19 14:39:17,436 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [gErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gErr3ASSERT_VIOLATIONINTEGER_OVERFLOW] === [2021-12-19 14:39:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 14:39:17,437 INFO L85 PathProgramCache]: Analyzing trace with hash 984760914, now seen corresponding path program 8 times [2021-12-19 14:39:17,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 14:39:17,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017907719] [2021-12-19 14:39:17,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 14:39:17,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 14:39:19,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 14:41:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:41:27,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 14:41:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017907719] [2021-12-19 14:41:27,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017907719] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 14:41:27,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749631438] [2021-12-19 14:41:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 14:41:27,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 14:41:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 14:41:27,551 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) [2021-12-19 14:41:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-19 14:41:27,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 14:41:27,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 14:41:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 3453 conjuncts, 768 conjunts are in the unsatisfiable core [2021-12-19 14:41:28,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 14:41:30,971 INFO L134 CoverageAnalysis]: Checked inductivity of 365383 backedges. 0 proven. 365383 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 14:41:30,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15