./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/heavy-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability 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/loops/heavy-2.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 12cc72c171310a5d1c1c1ed79b09d06400e5b2d9 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:03:45,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:03:45,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:03:45,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:03:45,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:03:45,124 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:03:45,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:03:45,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:03:45,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:03:45,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:03:45,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:03:45,145 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:03:45,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:03:45,148 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:03:45,149 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:03:45,152 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:03:45,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:03:45,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:03:45,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:03:45,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:03:45,161 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:03:45,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:03:45,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:03:45,164 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:03:45,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:03:45,171 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:03:45,171 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:03:45,172 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:03:45,173 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:03:45,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:03:45,174 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:03:45,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:03:45,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:03:45,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:03:45,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:03:45,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:03:45,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:03:45,178 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:03:45,178 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:03:45,179 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:03:45,180 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:03:45,181 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:03:45,206 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:03:45,206 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:03:45,207 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:03:45,207 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:03:45,209 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:03:45,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:03:45,209 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:03:45,210 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:03:45,210 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:03:45,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:03:45,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:03:45,211 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:03:45,212 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:03:45,212 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:03:45,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:03:45,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:03:45,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:45,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:03:45,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:03:45,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 12cc72c171310a5d1c1c1ed79b09d06400e5b2d9 [2021-08-26 03:03:45,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:03:45,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:03:45,500 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:03:45,501 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:03:45,501 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:03:45,502 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/heavy-2.c [2021-08-26 03:03:45,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bd17092/d75085ffaf564d17b8cf3944be773df5/FLAG6fd40b3a1 [2021-08-26 03:03:45,929 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:03:45,930 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/heavy-2.c [2021-08-26 03:03:45,935 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bd17092/d75085ffaf564d17b8cf3944be773df5/FLAG6fd40b3a1 [2021-08-26 03:03:45,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65bd17092/d75085ffaf564d17b8cf3944be773df5 [2021-08-26 03:03:45,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:03:45,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:03:45,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:45,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:03:45,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:03:45,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:45" (1/1) ... [2021-08-26 03:03:45,957 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69bee93d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:45, skipping insertion in model container [2021-08-26 03:03:45,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:03:45" (1/1) ... [2021-08-26 03:03:45,962 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:03:45,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:03:46,059 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/loops/heavy-2.c[600,613] [2021-08-26 03:03:46,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:46,113 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:03:46,142 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/loops/heavy-2.c[600,613] [2021-08-26 03:03:46,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:03:46,196 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:03:46,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46 WrapperNode [2021-08-26 03:03:46,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:03:46,199 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:46,199 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:03:46,199 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:03:46,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:03:46,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:03:46,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:03:46,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:03:46,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,238 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,259 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:03:46,260 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:03:46,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:03:46,261 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:03:46,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (1/1) ... [2021-08-26 03:03:46,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:03:46,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:46,279 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) [2021-08-26 03:03:46,298 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 [2021-08-26 03:03:46,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 03:03:46,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:03:46,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:03:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 03:03:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:03:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-08-26 03:03:46,312 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:03:46,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:03:46,560 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:03:46,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:46 BoogieIcfgContainer [2021-08-26 03:03:46,561 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:03:46,562 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:03:46,562 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:03:46,582 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:03:46,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:03:45" (1/3) ... [2021-08-26 03:03:46,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28172794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:46, skipping insertion in model container [2021-08-26 03:03:46,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:03:46" (2/3) ... [2021-08-26 03:03:46,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28172794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:03:46, skipping insertion in model container [2021-08-26 03:03:46,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:46" (3/3) ... [2021-08-26 03:03:46,584 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2021-08-26 03:03:46,588 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:03:46,589 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:03:46,625 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:03:46,632 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 [2021-08-26 03:03:46,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:03:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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) [2021-08-26 03:03:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 03:03:46,648 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:46,648 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 03:03:46,649 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:46,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:46,657 INFO L82 PathProgramCache]: Analyzing trace with hash 28726599, now seen corresponding path program 1 times [2021-08-26 03:03:46,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:46,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133397587] [2021-08-26 03:03:46,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:46,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:46,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:46,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133397587] [2021-08-26 03:03:46,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133397587] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:46,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:46,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:03:46,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089035795] [2021-08-26 03:03:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:03:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:46,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:03:46,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:03:46,812 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 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 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-08-26 03:03:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:46,823 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2021-08-26 03:03:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:03:46,824 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2021-08-26 03:03:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:46,829 INFO L225 Difference]: With dead ends: 26 [2021-08-26 03:03:46,829 INFO L226 Difference]: Without dead ends: 11 [2021-08-26 03:03:46,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:03:46,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-08-26 03:03:46,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-08-26 03:03:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) 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) [2021-08-26 03:03:46,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-08-26 03:03:46,850 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2021-08-26 03:03:46,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:46,850 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-08-26 03:03:46,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2021-08-26 03:03:46,851 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-08-26 03:03:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-26 03:03:46,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:46,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-26 03:03:46,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:03:46,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash 28697769, now seen corresponding path program 1 times [2021-08-26 03:03:46,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:46,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000071150] [2021-08-26 03:03:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:46,856 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:46,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:46,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:46,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000071150] [2021-08-26 03:03:46,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000071150] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:46,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:46,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:03:46,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185954502] [2021-08-26 03:03:46,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:03:46,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:03:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:46,914 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-08-26 03:03:46,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:46,940 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-08-26 03:03:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:03:46,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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 [2021-08-26 03:03:46,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:46,941 INFO L225 Difference]: With dead ends: 20 [2021-08-26 03:03:46,941 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:03:46,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:46,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:03:46,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2021-08-26 03:03:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-08-26 03:03:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-08-26 03:03:46,944 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2021-08-26 03:03:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:46,944 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-08-26 03:03:46,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) 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) [2021-08-26 03:03:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-08-26 03:03:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-26 03:03:46,945 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:46,945 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:46,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:03:46,945 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash 269702257, now seen corresponding path program 1 times [2021-08-26 03:03:46,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:46,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43055141] [2021-08-26 03:03:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:46,946 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:46,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:47,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:47,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43055141] [2021-08-26 03:03:47,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43055141] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:47,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:47,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:03:47,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479745043] [2021-08-26 03:03:47,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:03:47,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:03:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:47,006 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-08-26 03:03:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:47,023 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-08-26 03:03:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:03:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) Word has length 8 [2021-08-26 03:03:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:47,024 INFO L225 Difference]: With dead ends: 25 [2021-08-26 03:03:47,024 INFO L226 Difference]: Without dead ends: 16 [2021-08-26 03:03:47,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-26 03:03:47,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2021-08-26 03:03:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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) [2021-08-26 03:03:47,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2021-08-26 03:03:47,026 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2021-08-26 03:03:47,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:47,026 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2021-08-26 03:03:47,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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) [2021-08-26 03:03:47,026 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2021-08-26 03:03:47,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 03:03:47,027 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:47,027 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:47,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 03:03:47,027 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:47,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash 904437765, now seen corresponding path program 1 times [2021-08-26 03:03:47,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:47,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081219916] [2021-08-26 03:03:47,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:47,028 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:47,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:47,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:47,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081219916] [2021-08-26 03:03:47,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081219916] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:47,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:03:47,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:03:47,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938614954] [2021-08-26 03:03:47,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:03:47,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:47,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:03:47,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:47,065 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-26 03:03:47,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:47,077 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-08-26 03:03:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:03:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 11 [2021-08-26 03:03:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:47,078 INFO L225 Difference]: With dead ends: 25 [2021-08-26 03:03:47,078 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 03:03:47,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:03:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 03:03:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-26 03:03:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2021-08-26 03:03:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-26 03:03:47,080 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2021-08-26 03:03:47,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:47,080 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-26 03:03:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) [2021-08-26 03:03:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-26 03:03:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-26 03:03:47,081 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:47,081 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:47,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 03:03:47,081 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:47,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:47,082 INFO L82 PathProgramCache]: Analyzing trace with hash -2012164797, now seen corresponding path program 1 times [2021-08-26 03:03:47,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:47,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59133237] [2021-08-26 03:03:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:47,082 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:47,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:47,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:47,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59133237] [2021-08-26 03:03:47,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59133237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:47,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092939218] [2021-08-26 03:03:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:47,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:47,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:47,197 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:03:47,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:03:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 03:03:47,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:47,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:47,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092939218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:47,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:03:47,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 03:03:47,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981268658] [2021-08-26 03:03:47,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:03:47,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:47,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:03:47,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:03:47,402 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-08-26 03:03:47,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:47,439 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-08-26 03:03:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:03:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 13 [2021-08-26 03:03:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:47,441 INFO L225 Difference]: With dead ends: 28 [2021-08-26 03:03:47,441 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:03:47,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:03:47,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:03:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-26 03:03:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2021-08-26 03:03:47,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-26 03:03:47,444 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2021-08-26 03:03:47,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:47,444 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-26 03:03:47,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-08-26 03:03:47,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-26 03:03:47,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:03:47,444 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:03:47,444 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:03:47,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 03:03:47,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:47,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:03:47,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:03:47,654 INFO L82 PathProgramCache]: Analyzing trace with hash -253582591, now seen corresponding path program 2 times [2021-08-26 03:03:47,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:03:47,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618447321] [2021-08-26 03:03:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:03:47,654 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:03:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:03:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:03:47,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:03:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618447321] [2021-08-26 03:03:47,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618447321] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:03:47,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46893206] [2021-08-26 03:03:47,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:03:47,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:03:47,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:03:47,768 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:03:47,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:03:47,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-26 03:03:47,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:03:47,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:03:47,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:03:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-26 03:03:47,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46893206] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:03:47,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-26 03:03:47,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-08-26 03:03:47,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568311072] [2021-08-26 03:03:47,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:03:47,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:03:47,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:03:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:03:47,930 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-08-26 03:03:47,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:03:47,931 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-08-26 03:03:47,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:03:47,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) Word has length 15 [2021-08-26 03:03:47,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:03:47,932 INFO L225 Difference]: With dead ends: 16 [2021-08-26 03:03:47,932 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:03:47,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:03:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:03:47,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:03:47,933 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) [2021-08-26 03:03:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:03:47,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2021-08-26 03:03:47,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:03:47,933 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:03:47,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 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) [2021-08-26 03:03:47,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:03:47,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:03:47,935 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:03:47,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:03:48,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 03:03:48,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:03:48,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:03:48,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:03:48,158 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:03:48,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:03:48,161 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:03:48,173 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:03:48,174 INFO L857 garLoopResultBuilder]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2021-08-26 03:03:48,174 INFO L853 garLoopResultBuilder]: At program point L13-3(lines 13 15) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2021-08-26 03:03:48,174 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:03:48,174 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:03:48,174 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:03:48,174 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2021-08-26 03:03:48,175 INFO L860 garLoopResultBuilder]: At program point L22(lines 7 23) the Hoare annotation is: true [2021-08-26 03:03:48,175 INFO L853 garLoopResultBuilder]: At program point L18(lines 8 23) the Hoare annotation is: false [2021-08-26 03:03:48,175 INFO L857 garLoopResultBuilder]: For program point L14-2(lines 14 15) no Hoare annotation was computed. [2021-08-26 03:03:48,175 INFO L853 garLoopResultBuilder]: At program point L14-3(lines 14 15) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2021-08-26 03:03:48,175 INFO L857 garLoopResultBuilder]: For program point L12-2(lines 12 15) no Hoare annotation was computed. [2021-08-26 03:03:48,175 INFO L853 garLoopResultBuilder]: At program point L12-3(lines 12 15) the Hoare annotation is: (= ULTIMATE.start_main_~a~0 1) [2021-08-26 03:03:48,176 INFO L857 garLoopResultBuilder]: For program point L12-4(lines 8 23) no Hoare annotation was computed. [2021-08-26 03:03:48,179 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:03:48,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:03:48 BoogieIcfgContainer [2021-08-26 03:03:48,188 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:03:48,189 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:03:48,189 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:03:48,189 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:03:48,190 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:03:46" (3/4) ... [2021-08-26 03:03:48,191 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:03:48,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 03:03:48,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:03:48,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-26 03:03:48,198 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:03:48,221 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:03:48,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:03:48,222 INFO L168 Benchmark]: Toolchain (without parser) took 2269.33 ms. Allocated memory was 56.6 MB in the beginning and 88.1 MB in the end (delta: 31.5 MB). Free memory was 34.4 MB in the beginning and 47.2 MB in the end (delta: -12.7 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,223 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:48,223 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.47 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 34.2 MB in the beginning and 38.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,223 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.51 ms. Allocated memory is still 73.4 MB. Free memory was 38.9 MB in the beginning and 37.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,223 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 73.4 MB. Free memory was 37.2 MB in the beginning and 36.4 MB in the end (delta: 851.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:03:48,224 INFO L168 Benchmark]: RCFGBuilder took 300.77 ms. Allocated memory is still 73.4 MB. Free memory was 36.0 MB in the beginning and 49.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,224 INFO L168 Benchmark]: TraceAbstraction took 1626.49 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 49.4 MB in the beginning and 49.9 MB in the end (delta: -548.0 kB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,224 INFO L168 Benchmark]: Witness Printer took 32.39 ms. Allocated memory is still 88.1 MB. Free memory was 49.9 MB in the beginning and 47.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:03:48,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 56.6 MB. Free memory was 37.9 MB in the beginning and 37.8 MB in the end (delta: 37.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.47 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 34.2 MB in the beginning and 38.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 26.51 ms. Allocated memory is still 73.4 MB. Free memory was 38.9 MB in the beginning and 37.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 73.4 MB. Free memory was 37.2 MB in the beginning and 36.4 MB in the end (delta: 851.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 300.77 ms. Allocated memory is still 73.4 MB. Free memory was 36.0 MB in the beginning and 49.8 MB in the end (delta: -13.8 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1626.49 ms. Allocated memory was 73.4 MB in the beginning and 88.1 MB in the end (delta: 14.7 MB). Free memory was 49.4 MB in the beginning and 49.9 MB in the end (delta: -548.0 kB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 32.39 ms. Allocated memory is still 88.1 MB. Free memory was 49.9 MB in the beginning and 47.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 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: 21]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1555.7ms, OverallIterations: 6, TraceHistogramMax: 2, EmptinessCheckTime: 8.6ms, AutomataDifference: 133.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 20.4ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 69 SDtfs, 15 SDslu, 32 SDs, 0 SdLazy, 33 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 66.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=16occurred in iteration=5, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 10 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 13 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 31 FormulaSimplificationTreeSizeReduction, 6.3ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 6.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 40.7ms SsaConstructionTime, 137.7ms SatisfiabilityAnalysisTime, 522.2ms InterpolantComputationTime, 85 NumberOfCodeBlocks, 75 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 153 SizeOfPredicates, 3 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 10 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 15/21 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 1 specifications checked. All of them hold - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: a == 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: a == 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 03:03:48,254 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...