./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7efcb16e512d7de15a71f6cd895dcd8493c4b646 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:02:38,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:02:38,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:02:38,171 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:02:38,172 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:02:38,179 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:02:38,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:02:38,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:02:38,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:02:38,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:02:38,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:02:38,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:02:38,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:02:38,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:02:38,219 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:02:38,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:02:38,222 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:02:38,223 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:02:38,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:02:38,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:02:38,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:02:38,233 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:02:38,235 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:02:38,236 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:02:38,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:02:38,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:02:38,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:02:38,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:02:38,244 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:02:38,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:02:38,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:02:38,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:02:38,249 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:02:38,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:02:38,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:02:38,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:02:38,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:02:38,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:02:38,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:02:38,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:02:38,260 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:02:38,263 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 00:02:38,318 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:02:38,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:02:38,321 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:02:38,321 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:02:38,322 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:02:38,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:02:38,322 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:02:38,323 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:02:38,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:02:38,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:02:38,325 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:02:38,325 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 00:02:38,325 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 00:02:38,326 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 00:02:38,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:02:38,326 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 00:02:38,326 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:02:38,327 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:02:38,327 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:02:38,327 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:02:38,328 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:02:38,328 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:02:38,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:02:38,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:02:38,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:02:38,329 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:02:38,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:02:38,330 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:02:38,330 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-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7efcb16e512d7de15a71f6cd895dcd8493c4b646 [2020-11-30 00:02:38,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:02:38,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:02:38,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:02:38,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:02:38,728 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:02:38,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/../../sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-11-30 00:02:38,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/data/649fb46f0/e46cec4e30264613985319b437929afb/FLAG6c80d0490 [2020-11-30 00:02:39,421 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:02:39,422 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/sv-benchmarks/c/memsafety-ext3/scopes3.c [2020-11-30 00:02:39,429 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/data/649fb46f0/e46cec4e30264613985319b437929afb/FLAG6c80d0490 [2020-11-30 00:02:39,773 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/data/649fb46f0/e46cec4e30264613985319b437929afb [2020-11-30 00:02:39,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:02:39,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 00:02:39,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:02:39,781 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:02:39,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:02:39,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:02:39" (1/1) ... [2020-11-30 00:02:39,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7304df14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:39, skipping insertion in model container [2020-11-30 00:02:39,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:02:39" (1/1) ... [2020-11-30 00:02:39,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:02:39,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:02:40,032 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:02:40,079 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:02:40,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:02:40,126 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:02:40,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40 WrapperNode [2020-11-30 00:02:40,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:02:40,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:02:40,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:02:40,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:02:40,145 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,157 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,159 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... [2020-11-30 00:02:40,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:02:40,186 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:02:40,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:02:40,186 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:02:40,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:02:40,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 00:02:40,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:02:40,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 00:02:40,284 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 00:02:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:02:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:02:40,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:02:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 00:02:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:02:40,286 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:02:40,689 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:02:40,690 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-30 00:02:40,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:02:40 BoogieIcfgContainer [2020-11-30 00:02:40,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:02:40,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:02:40,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:02:40,699 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:02:40,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:02:39" (1/3) ... [2020-11-30 00:02:40,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45421b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:02:40, skipping insertion in model container [2020-11-30 00:02:40,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:02:40" (2/3) ... [2020-11-30 00:02:40,702 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45421b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:02:40, skipping insertion in model container [2020-11-30 00:02:40,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:02:40" (3/3) ... [2020-11-30 00:02:40,704 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes3.c [2020-11-30 00:02:40,717 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:02:40,722 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-11-30 00:02:40,738 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-11-30 00:02:40,765 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:02:40,765 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 00:02:40,765 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:02:40,765 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:02:40,766 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:02:40,766 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:02:40,766 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:02:40,766 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:02:40,783 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-11-30 00:02:40,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:02:40,793 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:40,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:40,794 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:40,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:40,802 INFO L82 PathProgramCache]: Analyzing trace with hash -197094901, now seen corresponding path program 1 times [2020-11-30 00:02:40,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:40,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229250591] [2020-11-30 00:02:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:41,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229250591] [2020-11-30 00:02:41,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:02:41,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:02:41,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183297728] [2020-11-30 00:02:41,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:02:41,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:41,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:02:41,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:02:41,102 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 3 states. [2020-11-30 00:02:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:41,229 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2020-11-30 00:02:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:02:41,232 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-30 00:02:41,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:41,260 INFO L225 Difference]: With dead ends: 26 [2020-11-30 00:02:41,261 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 00:02:41,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:02:41,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 00:02:41,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-11-30 00:02:41,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 00:02:41,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-30 00:02:41,305 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 8 [2020-11-30 00:02:41,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:41,306 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-30 00:02:41,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:02:41,308 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-30 00:02:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:02:41,309 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:41,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:41,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:02:41,310 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:41,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:41,312 INFO L82 PathProgramCache]: Analyzing trace with hash -197095180, now seen corresponding path program 1 times [2020-11-30 00:02:41,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:41,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844548043] [2020-11-30 00:02:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:41,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844548043] [2020-11-30 00:02:41,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:02:41,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:02:41,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415056032] [2020-11-30 00:02:41,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:02:41,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:41,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:02:41,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:02:41,417 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-11-30 00:02:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:41,511 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-30 00:02:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:02:41,512 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 00:02:41,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:41,513 INFO L225 Difference]: With dead ends: 22 [2020-11-30 00:02:41,513 INFO L226 Difference]: Without dead ends: 22 [2020-11-30 00:02:41,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:02:41,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-11-30 00:02:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-11-30 00:02:41,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:02:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-30 00:02:41,519 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 8 [2020-11-30 00:02:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:41,519 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-30 00:02:41,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:02:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-30 00:02:41,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:02:41,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:41,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:41,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:02:41,521 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:41,522 INFO L82 PathProgramCache]: Analyzing trace with hash -197095125, now seen corresponding path program 1 times [2020-11-30 00:02:41,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:41,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155520600] [2020-11-30 00:02:41,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:41,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:41,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:41,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155520600] [2020-11-30 00:02:41,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:02:41,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:02:41,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721097928] [2020-11-30 00:02:41,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:02:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:41,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:02:41,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:02:41,653 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 4 states. [2020-11-30 00:02:41,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:41,749 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-30 00:02:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:02:41,750 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 00:02:41,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:41,750 INFO L225 Difference]: With dead ends: 16 [2020-11-30 00:02:41,751 INFO L226 Difference]: Without dead ends: 16 [2020-11-30 00:02:41,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:02:41,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-30 00:02:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-30 00:02:41,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-30 00:02:41,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-30 00:02:41,755 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 8 [2020-11-30 00:02:41,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:41,755 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-30 00:02:41,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:02:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-30 00:02:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 00:02:41,756 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:41,756 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:41,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:02:41,757 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:41,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:41,757 INFO L82 PathProgramCache]: Analyzing trace with hash -197095126, now seen corresponding path program 1 times [2020-11-30 00:02:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:41,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489038073] [2020-11-30 00:02:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489038073] [2020-11-30 00:02:41,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:02:41,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:02:41,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204058406] [2020-11-30 00:02:41,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:02:41,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:41,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:02:41,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:02:41,811 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 4 states. [2020-11-30 00:02:42,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:42,018 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-30 00:02:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:02:42,019 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 00:02:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:42,020 INFO L225 Difference]: With dead ends: 15 [2020-11-30 00:02:42,020 INFO L226 Difference]: Without dead ends: 15 [2020-11-30 00:02:42,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:02:42,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-30 00:02:42,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-30 00:02:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 00:02:42,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-30 00:02:42,024 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2020-11-30 00:02:42,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:42,024 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-30 00:02:42,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:02:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-30 00:02:42,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 00:02:42,025 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:42,025 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:42,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 00:02:42,026 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:42,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:42,029 INFO L82 PathProgramCache]: Analyzing trace with hash -440617163, now seen corresponding path program 1 times [2020-11-30 00:02:42,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:42,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984455552] [2020-11-30 00:02:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:42,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:42,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984455552] [2020-11-30 00:02:42,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551600424] [2020-11-30 00:02:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:42,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 00:02:42,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:42,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:42,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:42,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-30 00:02:42,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681341645] [2020-11-30 00:02:42,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:02:42,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:42,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:02:42,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:02:42,282 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 6 states. [2020-11-30 00:02:42,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:42,396 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-30 00:02:42,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:02:42,398 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-30 00:02:42,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:42,399 INFO L225 Difference]: With dead ends: 20 [2020-11-30 00:02:42,399 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 00:02:42,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:02:42,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 00:02:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2020-11-30 00:02:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 00:02:42,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-30 00:02:42,404 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2020-11-30 00:02:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:42,404 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-30 00:02:42,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:02:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-30 00:02:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 00:02:42,405 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:42,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:42,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:42,606 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1004249772, now seen corresponding path program 2 times [2020-11-30 00:02:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:42,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455636780] [2020-11-30 00:02:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:42,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455636780] [2020-11-30 00:02:42,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990230472] [2020-11-30 00:02:42,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:02:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:42,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:02:42,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:42,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:42,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:42,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-30 00:02:42,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098208073] [2020-11-30 00:02:42,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:02:42,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:42,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:02:42,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:02:42,866 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 7 states. [2020-11-30 00:02:42,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:42,975 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-30 00:02:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:02:42,982 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-30 00:02:42,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:42,983 INFO L225 Difference]: With dead ends: 23 [2020-11-30 00:02:42,983 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 00:02:42,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:02:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 00:02:42,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-11-30 00:02:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:02:42,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-11-30 00:02:42,988 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2020-11-30 00:02:42,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:42,988 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-11-30 00:02:42,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:02:42,989 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-11-30 00:02:42,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:02:42,989 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:42,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:43,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:43,194 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:43,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1138822869, now seen corresponding path program 3 times [2020-11-30 00:02:43,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:43,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79271398] [2020-11-30 00:02:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:43,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79271398] [2020-11-30 00:02:43,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240966970] [2020-11-30 00:02:43,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:43,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 00:02:43,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:43,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:02:43,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:43,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:43,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-30 00:02:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392832083] [2020-11-30 00:02:43,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 00:02:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:43,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 00:02:43,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:02:43,479 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-11-30 00:02:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:43,561 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-11-30 00:02:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 00:02:43,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-11-30 00:02:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:43,562 INFO L225 Difference]: With dead ends: 26 [2020-11-30 00:02:43,562 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 00:02:43,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:02:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 00:02:43,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-30 00:02:43,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:02:43,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-30 00:02:43,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 17 [2020-11-30 00:02:43,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:43,568 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-30 00:02:43,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 00:02:43,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-30 00:02:43,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:02:43,569 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:43,570 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:43,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:43,771 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:43,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:43,771 INFO L82 PathProgramCache]: Analyzing trace with hash 727015860, now seen corresponding path program 4 times [2020-11-30 00:02:43,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:43,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764924531] [2020-11-30 00:02:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:43,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:43,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764924531] [2020-11-30 00:02:43,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024139014] [2020-11-30 00:02:43,944 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:44,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 00:02:44,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:44,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 00:02:44,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:44,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:44,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-30 00:02:44,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334966032] [2020-11-30 00:02:44,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 00:02:44,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:44,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 00:02:44,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:02:44,071 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-11-30 00:02:44,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:44,170 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-11-30 00:02:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:02:44,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-11-30 00:02:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:44,173 INFO L225 Difference]: With dead ends: 29 [2020-11-30 00:02:44,173 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 00:02:44,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:02:44,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 00:02:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-11-30 00:02:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 00:02:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-11-30 00:02:44,178 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 20 [2020-11-30 00:02:44,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:44,179 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-11-30 00:02:44,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 00:02:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-11-30 00:02:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:02:44,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:44,180 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:44,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:44,381 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash -988991883, now seen corresponding path program 5 times [2020-11-30 00:02:44,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:44,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194567186] [2020-11-30 00:02:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:44,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:44,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:44,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194567186] [2020-11-30 00:02:44,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608740563] [2020-11-30 00:02:44,594 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:44,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-30 00:02:44,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:44,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 00:02:44,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:44,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:44,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-30 00:02:44,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857934328] [2020-11-30 00:02:44,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 00:02:44,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:44,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:02:44,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:02:44,776 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 10 states. [2020-11-30 00:02:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:44,871 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-11-30 00:02:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:02:44,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2020-11-30 00:02:44,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:44,873 INFO L225 Difference]: With dead ends: 32 [2020-11-30 00:02:44,873 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 00:02:44,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:02:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 00:02:44,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-11-30 00:02:44,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 00:02:44,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2020-11-30 00:02:44,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 23 [2020-11-30 00:02:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:44,877 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2020-11-30 00:02:44,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 00:02:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2020-11-30 00:02:44,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 00:02:44,878 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:44,878 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:45,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:45,079 INFO L429 AbstractCegarLoop]: === Iteration 10 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:45,079 INFO L82 PathProgramCache]: Analyzing trace with hash 420060692, now seen corresponding path program 6 times [2020-11-30 00:02:45,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:45,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634932599] [2020-11-30 00:02:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:45,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:45,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634932599] [2020-11-30 00:02:45,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834899611] [2020-11-30 00:02:45,275 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:45,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-30 00:02:45,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:45,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 00:02:45,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:45,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:45,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-30 00:02:45,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916957725] [2020-11-30 00:02:45,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 00:02:45,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:45,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 00:02:45,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:02:45,427 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 11 states. [2020-11-30 00:02:45,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:45,539 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-11-30 00:02:45,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:02:45,540 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-11-30 00:02:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:45,541 INFO L225 Difference]: With dead ends: 35 [2020-11-30 00:02:45,541 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 00:02:45,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:02:45,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 00:02:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-11-30 00:02:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 00:02:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-11-30 00:02:45,546 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 26 [2020-11-30 00:02:45,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:45,547 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-11-30 00:02:45,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 00:02:45,547 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-11-30 00:02:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-30 00:02:45,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:45,548 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:45,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:45,771 INFO L429 AbstractCegarLoop]: === Iteration 11 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:45,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1505028587, now seen corresponding path program 7 times [2020-11-30 00:02:45,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:45,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509192765] [2020-11-30 00:02:45,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:45,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:45,975 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:45,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509192765] [2020-11-30 00:02:45,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486039555] [2020-11-30 00:02:45,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:46,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 00:02:46,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:46,106 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:46,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:46,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-30 00:02:46,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136461758] [2020-11-30 00:02:46,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:02:46,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:46,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:02:46,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:02:46,109 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 12 states. [2020-11-30 00:02:46,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:46,243 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-11-30 00:02:46,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 00:02:46,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 29 [2020-11-30 00:02:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:46,245 INFO L225 Difference]: With dead ends: 38 [2020-11-30 00:02:46,245 INFO L226 Difference]: Without dead ends: 38 [2020-11-30 00:02:46,246 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:02:46,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-30 00:02:46,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-11-30 00:02:46,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 00:02:46,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-11-30 00:02:46,251 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 29 [2020-11-30 00:02:46,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:46,252 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-11-30 00:02:46,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:02:46,252 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-11-30 00:02:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 00:02:46,254 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:46,254 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:46,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:46,466 INFO L429 AbstractCegarLoop]: === Iteration 12 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:46,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1141435788, now seen corresponding path program 8 times [2020-11-30 00:02:46,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:46,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497760549] [2020-11-30 00:02:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:46,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:46,678 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:46,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497760549] [2020-11-30 00:02:46,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714692634] [2020-11-30 00:02:46,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:46,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:02:46,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:46,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:02:46,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:46,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:46,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-30 00:02:46,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411691465] [2020-11-30 00:02:46,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 00:02:46,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 00:02:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:02:46,829 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 13 states. [2020-11-30 00:02:46,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:46,936 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-11-30 00:02:46,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 00:02:46,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 32 [2020-11-30 00:02:46,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:46,938 INFO L225 Difference]: With dead ends: 41 [2020-11-30 00:02:46,938 INFO L226 Difference]: Without dead ends: 41 [2020-11-30 00:02:46,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:02:46,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-30 00:02:46,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2020-11-30 00:02:46,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-30 00:02:46,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-11-30 00:02:46,945 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2020-11-30 00:02:46,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:46,945 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-11-30 00:02:46,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 00:02:46,946 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-11-30 00:02:46,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-30 00:02:46,947 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:46,947 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:47,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 00:02:47,167 INFO L429 AbstractCegarLoop]: === Iteration 13 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:47,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1255881291, now seen corresponding path program 9 times [2020-11-30 00:02:47,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:47,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465870697] [2020-11-30 00:02:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:47,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:02:47,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:02:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:47,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465870697] [2020-11-30 00:02:47,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138055244] [2020-11-30 00:02:47,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:47,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-30 00:02:47,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:02:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 00:02:47,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:02:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:02:47,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:02:47,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-30 00:02:47,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242940180] [2020-11-30 00:02:47,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 00:02:47,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:02:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 00:02:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:02:47,664 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 14 states. [2020-11-30 00:02:47,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:02:47,781 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-11-30 00:02:47,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 00:02:47,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 35 [2020-11-30 00:02:47,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:02:47,782 INFO L225 Difference]: With dead ends: 42 [2020-11-30 00:02:47,783 INFO L226 Difference]: Without dead ends: 42 [2020-11-30 00:02:47,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2020-11-30 00:02:47,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-30 00:02:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-30 00:02:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-30 00:02:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-11-30 00:02:47,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 35 [2020-11-30 00:02:47,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:02:47,788 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-11-30 00:02:47,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 00:02:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-11-30 00:02:47,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 00:02:47,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:02:47,790 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:02:48,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:02:48,022 INFO L429 AbstractCegarLoop]: === Iteration 14 === [mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION]=== [2020-11-30 00:02:48,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:02:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash -497828140, now seen corresponding path program 10 times [2020-11-30 00:02:48,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:02:48,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816350272] [2020-11-30 00:02:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:02:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:02:48,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:02:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:02:48,128 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:02:48,166 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:02:48,167 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:02:48,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-30 00:02:48,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:02:48 BoogieIcfgContainer [2020-11-30 00:02:48,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:02:48,237 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:02:48,237 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:02:48,238 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:02:48,238 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:02:40" (3/4) ... [2020-11-30 00:02:48,240 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:02:48,321 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_fe0612df-bb65-490f-b41a-878af2940b43/bin/uautomizer/witness.graphml [2020-11-30 00:02:48,321 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:02:48,323 INFO L168 Benchmark]: Toolchain (without parser) took 8543.54 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 81.2 MB in the beginning and 61.2 MB in the end (delta: 20.0 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:02:48,323 INFO L168 Benchmark]: CDTParser took 0.71 ms. Allocated memory is still 83.9 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:02:48,324 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.81 ms. Allocated memory is still 107.0 MB. Free memory was 80.8 MB in the beginning and 86.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 00:02:48,324 INFO L168 Benchmark]: Boogie Preprocessor took 53.34 ms. Allocated memory is still 107.0 MB. Free memory was 86.3 MB in the beginning and 84.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:02:48,325 INFO L168 Benchmark]: RCFGBuilder took 506.43 ms. Allocated memory is still 107.0 MB. Free memory was 84.6 MB in the beginning and 73.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:02:48,326 INFO L168 Benchmark]: TraceAbstraction took 7541.94 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 73.3 MB in the beginning and 64.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. [2020-11-30 00:02:48,326 INFO L168 Benchmark]: Witness Printer took 83.95 ms. Allocated memory is still 130.0 MB. Free memory was 64.3 MB in the beginning and 61.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:02:48,329 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.71 ms. Allocated memory is still 83.9 MB. Free memory is still 43.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 348.81 ms. Allocated memory is still 107.0 MB. Free memory was 80.8 MB in the beginning and 86.3 MB in the end (delta: -5.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 53.34 ms. Allocated memory is still 107.0 MB. Free memory was 86.3 MB in the beginning and 84.6 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 506.43 ms. Allocated memory is still 107.0 MB. Free memory was 84.6 MB in the beginning and 73.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 7541.94 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 73.3 MB in the beginning and 64.3 MB in the end (delta: 8.9 MB). Peak memory consumption was 34.5 MB. Max. memory is 16.1 GB. * Witness Printer took 83.95 ms. Allocated memory is still 130.0 MB. Free memory was 64.3 MB in the beginning and 61.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; VAL [i=0] [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={3:0}, i=0, p={3:0}] [L6] p[0] = 1 VAL [a={3:0}, i=0, p={3:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={4:0}, i=1, p={4:0}] [L6] p[0] = 1 VAL [a={4:0}, i=1, p={4:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={5:0}, i=2, p={5:0}] [L6] p[0] = 1 VAL [a={5:0}, i=2, p={5:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={6:0}, i=3, p={6:0}] [L6] p[0] = 1 VAL [a={6:0}, i=3, p={6:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={7:0}, i=4, p={7:0}] [L6] p[0] = 1 VAL [a={7:0}, i=4, p={7:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={8:0}, i=5, p={8:0}] [L6] p[0] = 1 VAL [a={8:0}, i=5, p={8:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={9:0}, i=6, p={9:0}] [L6] p[0] = 1 VAL [a={9:0}, i=6, p={9:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={10:0}, i=7, p={10:0}] [L6] p[0] = 1 VAL [a={10:0}, i=7, p={10:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={11:0}, i=8, p={11:0}] [L6] p[0] = 1 VAL [a={11:0}, i=8, p={11:0}] [L3] i++ [L3] COND TRUE i < 10 [L4] int a[10]; [L5] p = a VAL [a={2:0}, i=9, p={2:0}] [L6] p[0] = 1 VAL [a={2:0}, i=9, p={2:0}] [L3] i++ [L3] COND FALSE !(i < 10) VAL [i=10, p={2:0}] [L8] p[0] = 2 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.4s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 132 SDslu, 533 SDs, 0 SdLazy, 398 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 315 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 13 MinimizatonAttempts, 22 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 484 NumberOfCodeBlocks, 480 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 424 ConstructedInterpolants, 0 QuantifiedInterpolants, 26952 SizeOfPredicates, 9 NumberOfNonLiveVariables, 1181 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 0/810 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...