./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/string-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD --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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/string-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD --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 fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:29:42,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:29:42,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:29:42,144 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:29:42,145 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:29:42,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:29:42,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:29:42,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:29:42,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:29:42,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:29:42,173 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:29:42,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:29:42,175 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:29:42,178 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:29:42,181 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:29:42,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:29:42,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:29:42,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:29:42,194 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:29:42,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:29:42,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:29:42,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:29:42,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:29:42,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:29:42,218 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:29:42,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:29:42,219 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:29:42,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:29:42,222 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:29:42,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:29:42,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:29:42,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:29:42,228 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:29:42,229 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:29:42,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:29:42,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:29:42,233 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:29:42,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:29:42,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:29:42,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:29:42,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:29:42,237 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 23:29:42,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:29:42,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:29:42,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:29:42,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:29:42,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:29:42,276 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:29:42,276 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:29:42,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:29:42,277 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 23:29:42,277 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:29:42,278 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 23:29:42,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:29:42,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 23:29:42,279 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 23:29:42,279 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 23:29:42,279 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 23:29:42,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:29:42,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:29:42,280 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 23:29:42,280 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:29:42,281 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:29:42,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 23:29:42,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:29:42,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:29:42,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 23:29:42,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 23:29:42,282 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:29:42,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 23:29:42,283 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 23:29:42,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 23:29:42,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 23:29:42,285 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:29:42,286 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2021-10-28 23:29:42,584 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:29:42,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:29:42,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:29:42,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:29:42,613 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:29:42,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loops/string-2.i [2021-10-28 23:29:42,690 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/a0d6a60a7/e926d9039db349f5bb48708cc9d5c4d1/FLAGc4b836102 [2021-10-28 23:29:43,251 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:29:43,253 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i [2021-10-28 23:29:43,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/a0d6a60a7/e926d9039db349f5bb48708cc9d5c4d1/FLAGc4b836102 [2021-10-28 23:29:43,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/a0d6a60a7/e926d9039db349f5bb48708cc9d5c4d1 [2021-10-28 23:29:43,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:29:43,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:29:43,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:29:43,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:29:43,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:29:43,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a8e692 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43, skipping insertion in model container [2021-10-28 23:29:43,614 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:29:43,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:29:43,835 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-28 23:29:43,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:29:43,879 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:29:43,892 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-28 23:29:43,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:29:43,922 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:29:43,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43 WrapperNode [2021-10-28 23:29:43,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:29:43,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:29:43,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:29:43,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:29:43,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,964 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:29:43,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:29:43,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:29:43,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:29:43,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:43,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:44,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:44,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:44,020 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:29:44,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:29:44,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:29:44,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:29:44,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (1/1) ... [2021-10-28 23:29:44,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:29:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:44,072 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:29:44,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:29:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 23:29:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:29:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 23:29:44,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:29:44,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:29:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 23:29:44,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:29:44,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:29:44,515 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 23:29:44,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:44 BoogieIcfgContainer [2021-10-28 23:29:44,517 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:29:44,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:29:44,519 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:29:44,523 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:29:44,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:29:43" (1/3) ... [2021-10-28 23:29:44,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9bbc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:29:44, skipping insertion in model container [2021-10-28 23:29:44,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:43" (2/3) ... [2021-10-28 23:29:44,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9bbc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:29:44, skipping insertion in model container [2021-10-28 23:29:44,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:44" (3/3) ... [2021-10-28 23:29:44,526 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-28 23:29:44,533 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:29:44,533 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:29:44,620 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:29:44,628 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:29:44,628 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:29:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2021-10-28 23:29:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:29:44,653 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:44,653 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:44,654 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:44,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:44,669 INFO L85 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-28 23:29:44,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:44,680 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679457494] [2021-10-28 23:29:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:44,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:45,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:45,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679457494] [2021-10-28 23:29:45,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679457494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:29:45,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:29:45,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:29:45,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265004606] [2021-10-28 23:29:45,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 23:29:45,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:45,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:29:45,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:29:45,045 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-10-28 23:29:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:45,156 INFO L93 Difference]: Finished difference Result 62 states and 95 transitions. [2021-10-28 23:29:45,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:29:45,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) Word has length 16 [2021-10-28 23:29:45,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:45,171 INFO L225 Difference]: With dead ends: 62 [2021-10-28 23:29:45,171 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 23:29:45,176 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:29:45,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 23:29:45,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2021-10-28 23:29:45,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 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) [2021-10-28 23:29:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-10-28 23:29:45,224 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2021-10-28 23:29:45,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:45,225 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-10-28 23:29:45,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 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) [2021-10-28 23:29:45,226 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-10-28 23:29:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-28 23:29:45,228 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:45,228 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:45,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 23:29:45,229 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:45,234 INFO L85 PathProgramCache]: Analyzing trace with hash 177830358, now seen corresponding path program 1 times [2021-10-28 23:29:45,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:45,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971262374] [2021-10-28 23:29:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:45,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:45,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:29:45,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:45,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971262374] [2021-10-28 23:29:45,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971262374] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:45,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095906481] [2021-10-28 23:29:45,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:45,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:45,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:45,343 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:45,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 23:29:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:29:45,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:45,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-28 23:29:45,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095906481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:45,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:45,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-28 23:29:45,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180986983] [2021-10-28 23:29:45,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 23:29:45,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:45,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:29:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:29:45,636 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-10-28 23:29:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:45,729 INFO L93 Difference]: Finished difference Result 61 states and 74 transitions. [2021-10-28 23:29:45,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:29:45,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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 22 [2021-10-28 23:29:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:45,731 INFO L225 Difference]: With dead ends: 61 [2021-10-28 23:29:45,731 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:29:45,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:29:45,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:29:45,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-28 23:29:45,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-28 23:29:45,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-28 23:29:45,740 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2021-10-28 23:29:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:45,740 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-28 23:29:45,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-10-28 23:29:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-28 23:29:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:29:45,742 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:45,742 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:45,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:45,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:45,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:45,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 2 times [2021-10-28 23:29:45,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:45,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067964741] [2021-10-28 23:29:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:45,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:46,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:29:46,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:46,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067964741] [2021-10-28 23:29:46,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067964741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:46,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553185004] [2021-10-28 23:29:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:29:46,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:46,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:46,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 23:29:46,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:29:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:29:46,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:29:46,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553185004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:46,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:46,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-28 23:29:46,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593399133] [2021-10-28 23:29:46,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:29:46,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:46,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:29:46,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:29:46,340 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:46,432 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2021-10-28 23:29:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:29:46,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 23:29:46,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:46,436 INFO L225 Difference]: With dead ends: 73 [2021-10-28 23:29:46,436 INFO L226 Difference]: Without dead ends: 52 [2021-10-28 23:29:46,438 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:29:46,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-28 23:29:46,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 32. [2021-10-28 23:29:46,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 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) [2021-10-28 23:29:46,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-10-28 23:29:46,462 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 26 [2021-10-28 23:29:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:46,462 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-10-28 23:29:46,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-10-28 23:29:46,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-28 23:29:46,464 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:46,465 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:46,685 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash -381068522, now seen corresponding path program 3 times [2021-10-28 23:29:46,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:46,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074484874] [2021-10-28 23:29:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:46,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:46,766 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:29:46,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:46,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074484874] [2021-10-28 23:29:46,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074484874] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:46,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519907719] [2021-10-28 23:29:46,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:29:46,767 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:46,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:46,769 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:46,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 23:29:46,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:29:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:46,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:29:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:46,984 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 23:29:46,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519907719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:46,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:46,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-28 23:29:46,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302499579] [2021-10-28 23:29:46,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 23:29:46,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:46,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 23:29:46,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:29:46,987 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-10-28 23:29:47,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:47,084 INFO L93 Difference]: Finished difference Result 85 states and 100 transitions. [2021-10-28 23:29:47,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 23:29:47,084 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 30 [2021-10-28 23:29:47,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:47,087 INFO L225 Difference]: With dead ends: 85 [2021-10-28 23:29:47,087 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 23:29:47,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:29:47,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 23:29:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 36. [2021-10-28 23:29:47,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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) [2021-10-28 23:29:47,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2021-10-28 23:29:47,102 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 30 [2021-10-28 23:29:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:47,103 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2021-10-28 23:29:47,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2021-10-28 23:29:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2021-10-28 23:29:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-28 23:29:47,105 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:47,105 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:47,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:47,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:47,326 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:47,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:47,327 INFO L85 PathProgramCache]: Analyzing trace with hash -583604682, now seen corresponding path program 4 times [2021-10-28 23:29:47,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:47,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245194122] [2021-10-28 23:29:47,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:47,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:29:47,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:29:47,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245194122] [2021-10-28 23:29:47,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245194122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:47,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880608577] [2021-10-28 23:29:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:29:47,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:47,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:29:47,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 23:29:47,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:29:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:29:47,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:47,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-28 23:29:47,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880608577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:29:47,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:47,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-28 23:29:47,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362444798] [2021-10-28 23:29:47,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:29:47,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:29:47,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:29:47,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:29:47,614 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-10-28 23:29:47,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:47,700 INFO L93 Difference]: Finished difference Result 95 states and 111 transitions. [2021-10-28 23:29:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:29:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 34 [2021-10-28 23:29:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:47,702 INFO L225 Difference]: With dead ends: 95 [2021-10-28 23:29:47,703 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:29:47,703 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:29:47,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:29:47,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-10-28 23:29:47,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-10-28 23:29:47,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-28 23:29:47,709 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2021-10-28 23:29:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:47,710 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-28 23:29:47,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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) [2021-10-28 23:29:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-28 23:29:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 23:29:47,712 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:47,712 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:47,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:47,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:29:47,926 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:47,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:47,927 INFO L85 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 5 times [2021-10-28 23:29:47,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:29:47,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383158424] [2021-10-28 23:29:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:47,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:29:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:29:47,971 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:29:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:29:48,036 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:29:48,036 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:29:48,038 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:29:48,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 23:29:48,045 INFO L731 BasicCegarLoop]: Path program histogram: [5, 1] [2021-10-28 23:29:48,049 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:29:48,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:29:48 BoogieIcfgContainer [2021-10-28 23:29:48,114 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:29:48,116 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:29:48,117 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:29:48,117 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:29:48,118 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:44" (3/4) ... [2021-10-28 23:29:48,122 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 23:29:48,122 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:29:48,125 INFO L168 Benchmark]: Toolchain (without parser) took 4533.73 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 77.6 MB in the beginning and 53.4 MB in the end (delta: 24.2 MB). Peak memory consumption was 55.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:48,125 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 93.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:48,126 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.88 ms. Allocated memory is still 119.5 MB. Free memory was 77.4 MB in the beginning and 92.0 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:48,131 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.48 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 90.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:48,133 INFO L168 Benchmark]: Boogie Preprocessor took 64.28 ms. Allocated memory is still 119.5 MB. Free memory was 90.5 MB in the beginning and 89.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:48,136 INFO L168 Benchmark]: RCFGBuilder took 486.85 ms. Allocated memory is still 119.5 MB. Free memory was 89.1 MB in the beginning and 77.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:48,137 INFO L168 Benchmark]: TraceAbstraction took 3596.07 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 77.0 MB in the beginning and 53.4 MB in the end (delta: 23.6 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:48,137 INFO L168 Benchmark]: Witness Printer took 6.00 ms. Allocated memory is still 151.0 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:48,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 119.5 MB. Free memory is still 93.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.88 ms. Allocated memory is still 119.5 MB. Free memory was 77.4 MB in the beginning and 92.0 MB in the end (delta: -14.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.48 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 90.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.28 ms. Allocated memory is still 119.5 MB. Free memory was 90.5 MB in the beginning and 89.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 486.85 ms. Allocated memory is still 119.5 MB. Free memory was 89.1 MB in the beginning and 77.4 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3596.07 ms. Allocated memory was 119.5 MB in the beginning and 151.0 MB in the end (delta: 31.5 MB). Free memory was 77.0 MB in the beginning and 53.4 MB in the end (delta: 23.6 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. * Witness Printer took 6.00 ms. Allocated memory is still 151.0 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 69. Possible FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND FALSE !((inc_B-1)< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD 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 -> fd601fa28543c13c2fbec075867019b65bb9d0c4bbf720a0162dbf887aa47892 [2021-10-28 23:29:51,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:29:51,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:29:51,610 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:29:51,612 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:29:51,613 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:29:51,614 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/loops/string-2.i [2021-10-28 23:29:51,714 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/fd61af291/8bedca5bfe6c40d986c7a986b805e0cb/FLAG8eefc2fe3 [2021-10-28 23:29:52,183 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:29:52,184 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i [2021-10-28 23:29:52,191 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/fd61af291/8bedca5bfe6c40d986c7a986b805e0cb/FLAG8eefc2fe3 [2021-10-28 23:29:52,570 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/data/fd61af291/8bedca5bfe6c40d986c7a986b805e0cb [2021-10-28 23:29:52,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:29:52,574 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:29:52,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:29:52,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:29:52,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:29:52,587 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@590f03d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52, skipping insertion in model container [2021-10-28 23:29:52,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:29:52,613 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:29:52,770 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-28 23:29:52,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:29:52,805 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:29:52,830 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/sv-benchmarks/c/loops/string-2.i[896,909] [2021-10-28 23:29:52,842 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:29:52,874 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:29:52,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52 WrapperNode [2021-10-28 23:29:52,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:29:52,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:29:52,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:29:52,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:29:52,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,912 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:29:52,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:29:52,953 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:29:52,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:29:52,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,972 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,973 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:52,996 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:53,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:53,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:53,005 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:29:53,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:29:53,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:29:53,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:29:53,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (1/1) ... [2021-10-28 23:29:53,025 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 23:29:53,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:29:53,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 23:29:53,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 23:29:53,114 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 23:29:53,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 23:29:53,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 23:29:53,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:29:53,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:29:53,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 23:29:53,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 23:29:53,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:29:53,464 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 23:29:53,467 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:53 BoogieIcfgContainer [2021-10-28 23:29:53,467 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:29:53,469 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 23:29:53,469 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 23:29:53,472 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 23:29:53,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 11:29:52" (1/3) ... [2021-10-28 23:29:53,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7224f352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:29:53, skipping insertion in model container [2021-10-28 23:29:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:29:52" (2/3) ... [2021-10-28 23:29:53,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7224f352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 11:29:53, skipping insertion in model container [2021-10-28 23:29:53,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:53" (3/3) ... [2021-10-28 23:29:53,476 INFO L111 eAbstractionObserver]: Analyzing ICFG string-2.i [2021-10-28 23:29:53,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 23:29:53,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 23:29:53,574 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 23:29:53,590 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 23:29:53,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 23:29:53,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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) [2021-10-28 23:29:53,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 23:29:53,640 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:53,641 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:53,644 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:53,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:53,657 INFO L85 PathProgramCache]: Analyzing trace with hash 374782792, now seen corresponding path program 1 times [2021-10-28 23:29:53,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:53,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012587520] [2021-10-28 23:29:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:53,677 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:53,685 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:53,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 23:29:53,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:53,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-28 23:29:53,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:53,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:53,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:54,016 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:54,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012587520] [2021-10-28 23:29:54,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012587520] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:29:54,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:29:54,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 23:29:54,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847517666] [2021-10-28 23:29:54,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 23:29:54,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:54,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 23:29:54,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:29:54,050 INFO L87 Difference]: Start difference. First operand has 26 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 25 states have internal predecessors, (40), 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 8.0) internal successors, (16), 2 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) [2021-10-28 23:29:54,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:54,072 INFO L93 Difference]: Finished difference Result 48 states and 74 transitions. [2021-10-28 23:29:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 23:29:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) Word has length 16 [2021-10-28 23:29:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:54,083 INFO L225 Difference]: With dead ends: 48 [2021-10-28 23:29:54,083 INFO L226 Difference]: Without dead ends: 22 [2021-10-28 23:29:54,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 23:29:54,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-28 23:29:54,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-28 23:29:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:29:54,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2021-10-28 23:29:54,126 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 16 [2021-10-28 23:29:54,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:54,126 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2021-10-28 23:29:54,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 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) [2021-10-28 23:29:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2021-10-28 23:29:54,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 23:29:54,130 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:54,130 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:54,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:54,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:54,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:54,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:54,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1602331574, now seen corresponding path program 1 times [2021-10-28 23:29:54,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:54,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1884062669] [2021-10-28 23:29:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:54,354 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:54,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:54,355 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:54,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 23:29:54,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:54,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:29:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:54,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:29:54,658 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1884062669] [2021-10-28 23:29:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1884062669] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:29:54,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:29:54,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-28 23:29:54,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085542216] [2021-10-28 23:29:54,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 23:29:54,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:54,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:29:54,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:29:54,665 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-28 23:29:54,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:54,786 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2021-10-28 23:29:54,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:29:54,787 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) Word has length 18 [2021-10-28 23:29:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:54,790 INFO L225 Difference]: With dead ends: 58 [2021-10-28 23:29:54,790 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 23:29:54,792 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:29:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 23:29:54,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-28 23:29:54,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 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) [2021-10-28 23:29:54,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-10-28 23:29:54,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2021-10-28 23:29:54,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:54,801 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-10-28 23:29:54,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 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) [2021-10-28 23:29:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-10-28 23:29:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 23:29:54,803 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:54,804 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:54,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:55,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:55,018 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:55,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:55,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1590720246, now seen corresponding path program 1 times [2021-10-28 23:29:55,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:55,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [365490921] [2021-10-28 23:29:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:55,032 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:55,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:55,034 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:55,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 23:29:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:29:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:29:55,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-28 23:29:55,442 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:55,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [365490921] [2021-10-28 23:29:55,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [365490921] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:29:55,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:55,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 23:29:55,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389938937] [2021-10-28 23:29:55,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:29:55,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:55,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:29:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:29:55,450 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-10-28 23:29:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:55,868 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2021-10-28 23:29:55,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:29:55,871 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 26 [2021-10-28 23:29:55,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:55,872 INFO L225 Difference]: With dead ends: 91 [2021-10-28 23:29:55,873 INFO L226 Difference]: Without dead ends: 70 [2021-10-28 23:29:55,873 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-10-28 23:29:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-28 23:29:55,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2021-10-28 23:29:55,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 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) [2021-10-28 23:29:55,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-10-28 23:29:55,886 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 26 [2021-10-28 23:29:55,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:55,886 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-10-28 23:29:55,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-10-28 23:29:55,887 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-10-28 23:29:55,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-28 23:29:55,888 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:55,889 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:55,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:56,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:56,103 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:56,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash -270804906, now seen corresponding path program 2 times [2021-10-28 23:29:56,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:56,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1718556112] [2021-10-28 23:29:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:29:56,105 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:56,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:56,106 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:56,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 23:29:56,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-28 23:29:56,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:29:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 23:29:56,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-28 23:29:56,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-28 23:29:56,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:56,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1718556112] [2021-10-28 23:29:56,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1718556112] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:29:56,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:29:56,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 23:29:56,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099420078] [2021-10-28 23:29:56,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:29:56,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:29:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:29:56,729 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 23:29:56,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:56,863 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-28 23:29:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:29:56,864 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 38 [2021-10-28 23:29:56,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:56,865 INFO L225 Difference]: With dead ends: 46 [2021-10-28 23:29:56,865 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 23:29:56,866 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 23:29:56,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 23:29:56,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-10-28 23:29:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 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) [2021-10-28 23:29:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-10-28 23:29:56,876 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 38 [2021-10-28 23:29:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:56,877 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-10-28 23:29:56,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2021-10-28 23:29:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-10-28 23:29:56,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 23:29:56,878 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:56,879 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:56,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:57,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:57,089 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:57,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:57,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1799835385, now seen corresponding path program 1 times [2021-10-28 23:29:57,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:57,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982937117] [2021-10-28 23:29:57,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:57,091 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:57,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:57,092 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:57,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 23:29:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:29:57,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-28 23:29:57,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:57,539 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-28 23:29:57,539 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:57,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982937117] [2021-10-28 23:29:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982937117] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 23:29:57,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:29:57,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-28 23:29:57,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730588791] [2021-10-28 23:29:57,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 23:29:57,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 23:29:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:29:57,543 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-10-28 23:29:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:57,634 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-10-28 23:29:57,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:29:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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 40 [2021-10-28 23:29:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:57,636 INFO L225 Difference]: With dead ends: 54 [2021-10-28 23:29:57,637 INFO L226 Difference]: Without dead ends: 43 [2021-10-28 23:29:57,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-28 23:29:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-28 23:29:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-28 23:29:57,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 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) [2021-10-28 23:29:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-10-28 23:29:57,644 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 40 [2021-10-28 23:29:57,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:57,645 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-10-28 23:29:57,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 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) [2021-10-28 23:29:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-10-28 23:29:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-28 23:29:57,646 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:57,647 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:57,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:57,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:57,872 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:57,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:57,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1856180322, now seen corresponding path program 1 times [2021-10-28 23:29:57,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:57,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563440414] [2021-10-28 23:29:57,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:57,873 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:57,874 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:57,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 23:29:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:29:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:29:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:29:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-28 23:29:58,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 23:29:58,409 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-28 23:29:58,409 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 23:29:58,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563440414] [2021-10-28 23:29:58,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563440414] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-28 23:29:58,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:29:58,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-28 23:29:58,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119557820] [2021-10-28 23:29:58,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-28 23:29:58,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 23:29:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:29:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:29:58,413 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-10-28 23:29:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:29:58,605 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2021-10-28 23:29:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-28 23:29:58,606 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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 42 [2021-10-28 23:29:58,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 23:29:58,608 INFO L225 Difference]: With dead ends: 98 [2021-10-28 23:29:58,608 INFO L226 Difference]: Without dead ends: 88 [2021-10-28 23:29:58,608 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:29:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-28 23:29:58,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 52. [2021-10-28 23:29:58,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 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) [2021-10-28 23:29:58,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2021-10-28 23:29:58,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2021-10-28 23:29:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 23:29:58,619 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2021-10-28 23:29:58,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 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) [2021-10-28 23:29:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2021-10-28 23:29:58,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-28 23:29:58,621 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 23:29:58,622 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:29:58,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:58,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:58,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 23:29:58,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:29:58,835 INFO L85 PathProgramCache]: Analyzing trace with hash -512239655, now seen corresponding path program 1 times [2021-10-28 23:29:58,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 23:29:58,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1699843460] [2021-10-28 23:29:58,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:29:58,836 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 23:29:58,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat [2021-10-28 23:29:58,837 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 23:29:58,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 23:29:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:29:59,090 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:29:59,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:29:59,261 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 23:29:59,262 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 23:29:59,262 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 23:29:59,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:29:59,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/mathsat -unsat_core_generation=3 [2021-10-28 23:29:59,475 INFO L731 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2021-10-28 23:29:59,478 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 23:29:59,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 11:29:59 BoogieIcfgContainer [2021-10-28 23:29:59,522 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 23:29:59,523 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:29:59,523 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:29:59,523 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:29:59,524 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:29:53" (3/4) ... [2021-10-28 23:29:59,526 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 23:29:59,589 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_836da209-d163-4cb0-93c6-bec4c1e9eb0f/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:29:59,589 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:29:59,591 INFO L168 Benchmark]: Toolchain (without parser) took 7016.01 ms. Allocated memory was 60.8 MB in the beginning and 98.6 MB in the end (delta: 37.7 MB). Free memory was 40.9 MB in the beginning and 44.6 MB in the end (delta: -3.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,591 INFO L168 Benchmark]: CDTParser took 0.54 ms. Allocated memory is still 60.8 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:59,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.77 ms. Allocated memory is still 60.8 MB. Free memory was 40.6 MB in the beginning and 43.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,592 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.39 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:29:59,593 INFO L168 Benchmark]: Boogie Preprocessor took 51.81 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 40.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,593 INFO L168 Benchmark]: RCFGBuilder took 451.23 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 28.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,594 INFO L168 Benchmark]: TraceAbstraction took 6053.98 ms. Allocated memory was 60.8 MB in the beginning and 98.6 MB in the end (delta: 37.7 MB). Free memory was 28.1 MB in the beginning and 48.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,594 INFO L168 Benchmark]: Witness Printer took 66.54 ms. Allocated memory is still 98.6 MB. Free memory was 48.1 MB in the beginning and 44.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 23:29:59,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.54 ms. Allocated memory is still 60.8 MB. Free memory is still 42.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 298.77 ms. Allocated memory is still 60.8 MB. Free memory was 40.6 MB in the beginning and 43.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.39 ms. Allocated memory is still 60.8 MB. Free memory was 43.6 MB in the beginning and 42.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.81 ms. Allocated memory is still 60.8 MB. Free memory was 42.0 MB in the beginning and 40.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 451.23 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 28.7 MB in the end (delta: 11.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6053.98 ms. Allocated memory was 60.8 MB in the beginning and 98.6 MB in the end (delta: 37.7 MB). Free memory was 28.1 MB in the beginning and 48.1 MB in the end (delta: -19.9 MB). Peak memory consumption was 18.4 MB. Max. memory is 16.1 GB. * Witness Printer took 66.54 ms. Allocated memory is still 98.6 MB. Free memory was 48.1 MB in the beginning and 44.6 MB in the end (delta: 3.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L31] char string_A[5], string_B[5]; [L32] int i, j, nc_A, nc_B, found=0; [L35] i=0 [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND TRUE i<5 [L36] string_A[i]=__VERIFIER_nondet_char() [L35] i++ [L35] COND FALSE !(i<5) [L37] EXPR string_A[5 -1] [L37] COND FALSE !(!(string_A[5 -1]=='\0')) [L39] i=0 [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND TRUE i<5 [L40] string_B[i]=__VERIFIER_nondet_char() [L39] i++ [L39] COND FALSE !(i<5) [L41] EXPR string_B[5 -1] [L41] COND FALSE !(!(string_B[5 -1]=='\0')) [L43] nc_A = 0 [L44] EXPR string_A[nc_A] [L44] COND TRUE string_A[nc_A]!='\0' [L45] nc_A++ [L44] EXPR string_A[nc_A] [L44] COND FALSE !(string_A[nc_A]!='\0') [L47] nc_B = 0 [L48] EXPR string_B[nc_B] [L48] COND TRUE string_B[nc_B]!='\0' [L49] nc_B++ [L48] EXPR string_B[nc_B] [L48] COND FALSE !(string_B[nc_B]!='\0') [L51] COND FALSE !(!(nc_B >= nc_A)) [L54] EXPR j=0 [L54] i=j=0 [L55] COND TRUE (inc_B-1)<