./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/bitvector/gcd_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 20ed64ec 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/bitvector/gcd_2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-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 32bit --witnessprinter.graph.data.programhash 09113822ff1f24d8cc0fc226021f8d226800fb83 ...................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 11:25:41,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 11:25:41,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 11:25:41,958 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 11:25:41,959 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 11:25:41,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 11:25:41,964 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 11:25:41,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 11:25:41,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 11:25:41,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 11:25:41,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 11:25:41,980 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 11:25:41,981 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 11:25:41,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 11:25:41,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 11:25:41,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 11:25:41,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 11:25:41,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 11:25:41,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 11:25:42,000 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 11:25:42,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 11:25:42,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 11:25:42,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 11:25:42,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 11:25:42,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 11:25:42,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 11:25:42,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 11:25:42,017 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 11:25:42,017 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 11:25:42,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 11:25:42,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 11:25:42,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 11:25:42,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 11:25:42,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 11:25:42,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 11:25:42,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 11:25:42,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 11:25:42,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 11:25:42,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 11:25:42,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 11:25:42,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 11:25:42,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2021-08-27 11:25:42,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 11:25:42,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 11:25:42,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 11:25:42,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 11:25:42,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 11:25:42,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 11:25:42,076 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 11:25:42,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 11:25:42,076 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 11:25:42,076 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 11:25:42,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 11:25:42,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 11:25:42,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 11:25:42,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-27 11:25:42,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 11:25:42,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-27 11:25:42,078 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-08-27 11:25:42,078 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 11:25:42,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 11:25:42,079 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 11:25:42,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-27 11:25:42,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 11:25:42,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 11:25:42,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 11:25:42,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:25:42,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 11:25:42,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 11:25:42,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-27 11:25:42,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 11:25:42,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 11:25:42,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-27 11:25:42,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 11:25:42,081 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 09113822ff1f24d8cc0fc226021f8d226800fb83 [2021-08-27 11:25:42,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 11:25:42,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 11:25:42,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 11:25:42,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 11:25:42,421 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 11:25:42,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/gcd_2.c [2021-08-27 11:25:42,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c16e0e000/3dbe1740e1fe49ada28bfe544fa1f1f1/FLAGea846499c [2021-08-27 11:25:42,928 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 11:25:42,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_2.c [2021-08-27 11:25:42,934 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c16e0e000/3dbe1740e1fe49ada28bfe544fa1f1f1/FLAGea846499c [2021-08-27 11:25:43,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c16e0e000/3dbe1740e1fe49ada28bfe544fa1f1f1 [2021-08-27 11:25:43,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 11:25:43,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 11:25:43,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 11:25:43,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 11:25:43,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 11:25:43,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2366a76c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43, skipping insertion in model container [2021-08-27 11:25:43,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 11:25:43,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 11:25:43,454 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_2.c[359,372] [2021-08-27 11:25:43,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:25:43,470 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 11:25:43,480 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/gcd_2.c[359,372] [2021-08-27 11:25:43,488 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 11:25:43,498 INFO L208 MainTranslator]: Completed translation [2021-08-27 11:25:43,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43 WrapperNode [2021-08-27 11:25:43,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 11:25:43,500 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 11:25:43,500 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 11:25:43,500 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 11:25:43,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,564 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 11:25:43,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 11:25:43,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 11:25:43,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 11:25:43,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,571 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,573 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,576 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 11:25:43,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 11:25:43,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 11:25:43,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 11:25:43,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (1/1) ... [2021-08-27 11:25:43,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 11:25:43,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 11:25:43,604 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) [2021-08-27 11:25:43,608 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 [2021-08-27 11:25:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 11:25:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 11:25:43,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 11:25:43,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 11:25:43,841 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 11:25:43,856 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-08-27 11:25:43,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:25:43 BoogieIcfgContainer [2021-08-27 11:25:43,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 11:25:43,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 11:25:43,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 11:25:43,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 11:25:43,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 11:25:43" (1/3) ... [2021-08-27 11:25:43,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae16f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:25:43, skipping insertion in model container [2021-08-27 11:25:43,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 11:25:43" (2/3) ... [2021-08-27 11:25:43,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ae16f50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 11:25:43, skipping insertion in model container [2021-08-27 11:25:43,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:25:43" (3/3) ... [2021-08-27 11:25:43,865 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_2.c [2021-08-27 11:25:43,869 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 11:25:43,869 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2021-08-27 11:25:43,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 11:25:43,946 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, mConcurrency=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 [2021-08-27 11:25:43,946 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-27 11:25:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-08-27 11:25:43,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:25:43,960 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-08-27 11:25:43,960 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-08-27 11:25:43,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:25:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash 925604, now seen corresponding path program 1 times [2021-08-27 11:25:43,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:25:43,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696806388] [2021-08-27 11:25:43,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:25:43,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:25:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:25:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:25:44,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:25:44,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696806388] [2021-08-27 11:25:44,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696806388] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:25:44,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:25:44,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:25:44,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621278209] [2021-08-27 11:25:44,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:25:44,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:25:44,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:25:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,189 INFO L87 Difference]: Start difference. First operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:25:44,245 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2021-08-27 11:25:44,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:25:44,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-08-27 11:25:44,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:25:44,253 INFO L225 Difference]: With dead ends: 41 [2021-08-27 11:25:44,253 INFO L226 Difference]: Without dead ends: 11 [2021-08-27 11:25:44,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-27 11:25:44,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-27 11:25:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.375) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-08-27 11:25:44,279 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 4 [2021-08-27 11:25:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:25:44,280 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-08-27 11:25:44,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-08-27 11:25:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-27 11:25:44,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:25:44,281 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-27 11:25:44,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 11:25:44,281 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-08-27 11:25:44,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:25:44,284 INFO L82 PathProgramCache]: Analyzing trace with hash 28693763, now seen corresponding path program 1 times [2021-08-27 11:25:44,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:25:44,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492451605] [2021-08-27 11:25:44,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:25:44,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:25:44,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:25:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:25:44,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:25:44,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492451605] [2021-08-27 11:25:44,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492451605] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:25:44,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:25:44,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:25:44,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522996555] [2021-08-27 11:25:44,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:25:44,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:25:44,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:25:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,347 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:25:44,364 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-08-27 11:25:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:25:44,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-27 11:25:44,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:25:44,366 INFO L225 Difference]: With dead ends: 11 [2021-08-27 11:25:44,366 INFO L226 Difference]: Without dead ends: 10 [2021-08-27 11:25:44,367 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-27 11:25:44,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-27 11:25:44,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-08-27 11:25:44,369 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 5 [2021-08-27 11:25:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:25:44,370 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-08-27 11:25:44,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-08-27 11:25:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-27 11:25:44,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:25:44,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-27 11:25:44,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 11:25:44,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-08-27 11:25:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:25:44,372 INFO L82 PathProgramCache]: Analyzing trace with hash 28699785, now seen corresponding path program 1 times [2021-08-27 11:25:44,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:25:44,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331435988] [2021-08-27 11:25:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:25:44,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:25:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:25:44,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:25:44,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:25:44,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331435988] [2021-08-27 11:25:44,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331435988] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:25:44,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:25:44,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:25:44,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89393518] [2021-08-27 11:25:44,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:25:44,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:25:44,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:25:44,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,436 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:25:44,448 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-08-27 11:25:44,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:25:44,448 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-27 11:25:44,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:25:44,449 INFO L225 Difference]: With dead ends: 10 [2021-08-27 11:25:44,449 INFO L226 Difference]: Without dead ends: 9 [2021-08-27 11:25:44,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-27 11:25:44,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-27 11:25:44,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-08-27 11:25:44,452 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-08-27 11:25:44,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:25:44,452 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-08-27 11:25:44,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-08-27 11:25:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-27 11:25:44,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 11:25:44,453 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-27 11:25:44,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 11:25:44,453 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2021-08-27 11:25:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 11:25:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash 889693384, now seen corresponding path program 1 times [2021-08-27 11:25:44,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 11:25:44,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341842461] [2021-08-27 11:25:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 11:25:44,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 11:25:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 11:25:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 11:25:44,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 11:25:44,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341842461] [2021-08-27 11:25:44,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341842461] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 11:25:44,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 11:25:44,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-27 11:25:44,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777976291] [2021-08-27 11:25:44,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-27 11:25:44,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 11:25:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-27 11:25:44,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,501 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 11:25:44,509 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2021-08-27 11:25:44,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-27 11:25:44,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-08-27 11:25:44,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 11:25:44,510 INFO L225 Difference]: With dead ends: 9 [2021-08-27 11:25:44,510 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 11:25:44,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-27 11:25:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 11:25:44,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 11:25:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 11:25:44,512 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 6 [2021-08-27 11:25:44,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 11:25:44,512 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 11:25:44,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 11:25:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 11:25:44,512 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 11:25:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:25:44,516 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:25:44,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:25:44,517 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-08-27 11:25:44,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 11:25:44,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-27 11:25:44,523 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-27 11:25:44,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-27 11:25:44,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-27 11:25:44,532 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 17) no Hoare annotation was computed. [2021-08-27 11:25:44,532 INFO L857 garLoopResultBuilder]: For program point L19-1(lines 13 25) no Hoare annotation was computed. [2021-08-27 11:25:44,532 INFO L857 garLoopResultBuilder]: For program point L19-2(lines 19 23) no Hoare annotation was computed. [2021-08-27 11:25:44,532 INFO L860 garLoopResultBuilder]: At program point L40(lines 28 41) the Hoare annotation is: true [2021-08-27 11:25:44,532 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-27 11:25:44,533 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 38) no Hoare annotation was computed. [2021-08-27 11:25:44,533 INFO L860 garLoopResultBuilder]: At program point L36-1(lines 36 38) the Hoare annotation is: true [2021-08-27 11:25:44,533 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-27 11:25:44,534 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2021-08-27 11:25:44,534 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-27 11:25:44,534 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-27 11:25:44,534 INFO L860 garLoopResultBuilder]: At program point L24(lines 12 25) the Hoare annotation is: true [2021-08-27 11:25:44,534 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L16-1(line 16) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L16-2(line 16) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L16-4(lines 13 25) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 16) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2021-08-27 11:25:44,535 INFO L857 garLoopResultBuilder]: For program point L17-1(line 17) no Hoare annotation was computed. [2021-08-27 11:25:44,536 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 17) no Hoare annotation was computed. [2021-08-27 11:25:44,539 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 11:25:44,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 11:25:44 BoogieIcfgContainer [2021-08-27 11:25:44,547 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 11:25:44,547 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 11:25:44,548 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 11:25:44,548 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 11:25:44,548 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 11:25:43" (3/4) ... [2021-08-27 11:25:44,550 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 11:25:44,559 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-27 11:25:44,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-27 11:25:44,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 11:25:44,560 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 11:25:44,600 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 11:25:44,600 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 11:25:44,604 INFO L168 Benchmark]: Toolchain (without parser) took 1269.07 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 39.4 MB in the beginning and 39.0 MB in the end (delta: 410.1 kB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,605 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 42.8 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:25:44,605 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.67 ms. Allocated memory is still 60.8 MB. Free memory was 39.1 MB in the beginning and 29.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,606 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.28 ms. Allocated memory is still 60.8 MB. Free memory was 29.7 MB in the beginning and 44.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,606 INFO L168 Benchmark]: Boogie Preprocessor took 16.64 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 11:25:44,606 INFO L168 Benchmark]: RCFGBuilder took 276.72 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 30.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,606 INFO L168 Benchmark]: TraceAbstraction took 686.84 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 30.1 MB in the beginning and 41.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,607 INFO L168 Benchmark]: Witness Printer took 52.97 ms. Allocated memory is still 73.4 MB. Free memory was 41.8 MB in the beginning and 39.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 11:25:44,609 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 60.8 MB. Free memory was 42.9 MB in the beginning and 42.8 MB in the end (delta: 43.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.67 ms. Allocated memory is still 60.8 MB. Free memory was 39.1 MB in the beginning and 29.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.28 ms. Allocated memory is still 60.8 MB. Free memory was 29.7 MB in the beginning and 44.9 MB in the end (delta: -15.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.64 ms. Allocated memory is still 60.8 MB. Free memory was 44.9 MB in the beginning and 43.9 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 276.72 ms. Allocated memory is still 60.8 MB. Free memory was 43.9 MB in the beginning and 30.5 MB in the end (delta: 13.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 686.84 ms. Allocated memory was 60.8 MB in the beginning and 73.4 MB in the end (delta: 12.6 MB). Free memory was 30.1 MB in the beginning and 41.8 MB in the end (delta: -11.7 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. * Witness Printer took 52.97 ms. Allocated memory is still 73.4 MB. Free memory was 41.8 MB in the beginning and 39.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 16]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 17]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 17]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 609.7ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 7.0ms, AutomataDifference: 128.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 13.5ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 24 SDslu, 21 SDs, 0 SdLazy, 19 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 9 NumberOfFragments, 3 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 4.6ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 19.5ms SsaConstructionTime, 93.3ms SatisfiabilityAnalysisTime, 151.3ms InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 52 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 4 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-27 11:25:44,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...