./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/loop-acceleration/underapprox_2-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 00:07:11,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 00:07:11,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 00:07:11,141 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 00:07:11,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 00:07:11,144 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 00:07:11,146 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 00:07:11,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 00:07:11,149 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 00:07:11,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 00:07:11,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 00:07:11,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 00:07:11,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 00:07:11,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 00:07:11,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 00:07:11,157 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 00:07:11,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 00:07:11,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 00:07:11,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 00:07:11,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 00:07:11,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 00:07:11,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 00:07:11,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 00:07:11,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 00:07:11,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 00:07:11,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 00:07:11,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 00:07:11,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 00:07:11,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 00:07:11,173 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 00:07:11,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 00:07:11,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 00:07:11,174 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 00:07:11,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 00:07:11,175 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 00:07:11,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 00:07:11,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 00:07:11,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 00:07:11,176 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 00:07:11,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 00:07:11,177 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 00:07:11,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 00:07:11,213 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 00:07:11,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 00:07:11,213 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 00:07:11,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 00:07:11,214 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 00:07:11,214 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 00:07:11,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 00:07:11,214 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 00:07:11,214 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 00:07:11,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 00:07:11,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 00:07:11,216 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:07:11,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 00:07:11,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 00:07:11,217 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dc138f274319e5e58145eabf3fb84043b6d1bd3c616751e51efeb5e2ee2997a6 [2023-02-18 00:07:11,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 00:07:11,399 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 00:07:11,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 00:07:11,401 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 00:07:11,402 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 00:07:11,402 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2023-02-18 00:07:12,334 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 00:07:12,538 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 00:07:12,538 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2023-02-18 00:07:12,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5bb9b7c/a1cde6c3f1be470d9f9d692685028dbb/FLAG65d4307c4 [2023-02-18 00:07:12,976 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f5bb9b7c/a1cde6c3f1be470d9f9d692685028dbb [2023-02-18 00:07:12,977 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 00:07:12,979 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 00:07:12,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 00:07:12,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 00:07:12,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 00:07:12,997 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:07:12" (1/1) ... [2023-02-18 00:07:12,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21a4080 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:12, skipping insertion in model container [2023-02-18 00:07:12,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:07:12" (1/1) ... [2023-02-18 00:07:13,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 00:07:13,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 00:07:13,129 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2023-02-18 00:07:13,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:07:13,149 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 00:07:13,158 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2023-02-18 00:07:13,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 00:07:13,168 INFO L208 MainTranslator]: Completed translation [2023-02-18 00:07:13,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13 WrapperNode [2023-02-18 00:07:13,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 00:07:13,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 00:07:13,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 00:07:13,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 00:07:13,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,190 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2023-02-18 00:07:13,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 00:07:13,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 00:07:13,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 00:07:13,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 00:07:13,196 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,200 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,206 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 00:07:13,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 00:07:13,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 00:07:13,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 00:07:13,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (1/1) ... [2023-02-18 00:07:13,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 00:07:13,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:07:13,232 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) [2023-02-18 00:07:13,249 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 [2023-02-18 00:07:13,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 00:07:13,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 00:07:13,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 00:07:13,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 00:07:13,315 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 00:07:13,316 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 00:07:13,404 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 00:07:13,413 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 00:07:13,414 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 00:07:13,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:07:13 BoogieIcfgContainer [2023-02-18 00:07:13,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 00:07:13,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 00:07:13,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 00:07:13,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 00:07:13,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:07:12" (1/3) ... [2023-02-18 00:07:13,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eae08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:07:13, skipping insertion in model container [2023-02-18 00:07:13,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:07:13" (2/3) ... [2023-02-18 00:07:13,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23eae08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:07:13, skipping insertion in model container [2023-02-18 00:07:13,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:07:13" (3/3) ... [2023-02-18 00:07:13,424 INFO L112 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2023-02-18 00:07:13,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 00:07:13,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 00:07:13,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 00:07:13,482 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@212dc73c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 00:07:13,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 00:07:13,486 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2023-02-18 00:07:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 00:07:13,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:07:13,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 00:07:13,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:07:13,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:07:13,500 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2023-02-18 00:07:13,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:07:13,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950938778] [2023-02-18 00:07:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:07:13,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:07:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:07:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:13,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:07:13,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950938778] [2023-02-18 00:07:13,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950938778] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 00:07:13,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 00:07:13,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 00:07:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899934242] [2023-02-18 00:07:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 00:07:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 00:07:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:07:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 00:07:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:07:13,770 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2023-02-18 00:07:13,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:07:13,792 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-02-18 00:07:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 00:07:13,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 [2023-02-18 00:07:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:07:13,799 INFO L225 Difference]: With dead ends: 20 [2023-02-18 00:07:13,807 INFO L226 Difference]: Without dead ends: 8 [2023-02-18 00:07:13,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 00:07:13,812 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 3 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:07:13,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:07:13,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-18 00:07:13,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-18 00:07:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-02-18 00:07:13,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-02-18 00:07:13,850 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-02-18 00:07:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:07:13,859 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-02-18 00:07:13,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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) [2023-02-18 00:07:13,859 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-02-18 00:07:13,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-18 00:07:13,865 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:07:13,865 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-18 00:07:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 00:07:13,865 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:07:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:07:13,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2023-02-18 00:07:13,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:07:13,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314743864] [2023-02-18 00:07:13,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:07:13,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:07:13,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:07:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:07:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314743864] [2023-02-18 00:07:14,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314743864] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:07:14,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333117366] [2023-02-18 00:07:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:07:14,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:07:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:07:14,037 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) [2023-02-18 00:07:14,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 00:07:14,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:07:14,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 00:07:14,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:07:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:07:14,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333117366] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:07:14,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:07:14,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5] total 8 [2023-02-18 00:07:14,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199253735] [2023-02-18 00:07:14,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:07:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 00:07:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:07:14,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 00:07:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-02-18 00:07:14,117 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-02-18 00:07:14,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:07:14,150 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-18 00:07:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 00:07:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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 7 [2023-02-18 00:07:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:07:14,151 INFO L225 Difference]: With dead ends: 17 [2023-02-18 00:07:14,151 INFO L226 Difference]: Without dead ends: 11 [2023-02-18 00:07:14,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-18 00:07:14,153 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 00:07:14,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 00:07:14,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-18 00:07:14,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-18 00:07:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) 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) [2023-02-18 00:07:14,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-02-18 00:07:14,156 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-02-18 00:07:14,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:07:14,156 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-02-18 00:07:14,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 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) [2023-02-18 00:07:14,157 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-02-18 00:07:14,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 00:07:14,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:07:14,157 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-02-18 00:07:14,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 00:07:14,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:07:14,363 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:07:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:07:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2023-02-18 00:07:14,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:07:14,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888925590] [2023-02-18 00:07:14,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:07:14,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:07:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 00:07:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 00:07:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888925590] [2023-02-18 00:07:14,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888925590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 00:07:14,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137133898] [2023-02-18 00:07:14,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 00:07:14,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 00:07:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 00:07:14,462 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) [2023-02-18 00:07:14,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 00:07:14,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 00:07:14,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 00:07:14,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-18 00:07:14,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 00:07:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 00:07:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 00:07:14,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137133898] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 00:07:14,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 00:07:14,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2023-02-18 00:07:14,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122003632] [2023-02-18 00:07:14,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 00:07:14,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 00:07:14,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 00:07:14,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 00:07:14,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-02-18 00:07:14,572 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2023-02-18 00:07:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 00:07:14,753 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2023-02-18 00:07:14,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 00:07:14,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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 10 [2023-02-18 00:07:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 00:07:14,755 INFO L225 Difference]: With dead ends: 23 [2023-02-18 00:07:14,755 INFO L226 Difference]: Without dead ends: 17 [2023-02-18 00:07:14,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2023-02-18 00:07:14,757 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 00:07:14,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 00:07:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-18 00:07:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-18 00:07:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-02-18 00:07:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-18 00:07:14,760 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2023-02-18 00:07:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 00:07:14,760 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-18 00:07:14,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2023-02-18 00:07:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-18 00:07:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 00:07:14,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 00:07:14,761 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2023-02-18 00:07:14,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 00:07:14,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-18 00:07:14,967 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 00:07:14,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 00:07:14,968 INFO L85 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 3 times [2023-02-18 00:07:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 00:07:14,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339488498] [2023-02-18 00:07:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 00:07:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 00:07:14,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 00:07:14,982 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-02-18 00:07:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-02-18 00:07:14,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-02-18 00:07:15,001 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-02-18 00:07:15,002 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-18 00:07:15,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 00:07:15,008 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-02-18 00:07:15,010 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-18 00:07:15,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 12:07:15 BoogieIcfgContainer [2023-02-18 00:07:15,024 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-18 00:07:15,025 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-18 00:07:15,025 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-18 00:07:15,025 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-18 00:07:15,029 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:07:13" (3/4) ... [2023-02-18 00:07:15,031 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-02-18 00:07:15,062 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-18 00:07:15,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-18 00:07:15,063 INFO L158 Benchmark]: Toolchain (without parser) took 2083.39ms. Allocated memory is still 216.0MB. Free memory was 179.5MB in the beginning and 128.5MB in the end (delta: 51.0MB). Peak memory consumption was 52.8MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,063 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 138.4MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 00:07:15,063 INFO L158 Benchmark]: CACSL2BoogieTranslator took 181.88ms. Allocated memory is still 216.0MB. Free memory was 179.5MB in the beginning and 169.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,064 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.88ms. Allocated memory is still 216.0MB. Free memory was 169.6MB in the beginning and 168.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,064 INFO L158 Benchmark]: Boogie Preprocessor took 16.26ms. Allocated memory is still 216.0MB. Free memory was 168.1MB in the beginning and 167.5MB in the end (delta: 607.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-18 00:07:15,064 INFO L158 Benchmark]: RCFGBuilder took 206.94ms. Allocated memory is still 216.0MB. Free memory was 167.5MB in the beginning and 158.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,064 INFO L158 Benchmark]: TraceAbstraction took 1606.98ms. Allocated memory is still 216.0MB. Free memory was 157.6MB in the beginning and 130.6MB in the end (delta: 27.0MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,065 INFO L158 Benchmark]: Witness Printer took 37.43ms. Allocated memory is still 216.0MB. Free memory was 130.6MB in the beginning and 128.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-18 00:07:15,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 138.4MB. Free memory is still 81.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 181.88ms. Allocated memory is still 216.0MB. Free memory was 179.5MB in the beginning and 169.6MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.88ms. Allocated memory is still 216.0MB. Free memory was 169.6MB in the beginning and 168.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 16.26ms. Allocated memory is still 216.0MB. Free memory was 168.1MB in the beginning and 167.5MB in the end (delta: 607.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 206.94ms. Allocated memory is still 216.0MB. Free memory was 167.5MB in the beginning and 158.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1606.98ms. Allocated memory is still 216.0MB. Free memory was 157.6MB in the beginning and 130.6MB in the end (delta: 27.0MB). Peak memory consumption was 27.6MB. Max. memory is 16.1GB. * Witness Printer took 37.43ms. Allocated memory is still 216.0MB. Free memory was 130.6MB in the beginning and 128.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) VAL [x=6, y=64] [L21] CALL __VERIFIER_assert(x != 6) [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.5s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 35 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 35 mSDsluCounter, 46 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 28 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 94 IncrementalHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 18 mSDtfsCounter, 94 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 10 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=3, InterpolantAutomatonStates: 27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 244 SizeOfPredicates, 0 NumberOfNonLiveVariables, 99 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 RESULT: Ultimate proved your program to be incorrect! [2023-02-18 00:07:15,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE