./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/const_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_1-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 64dc8b0c2e0759b706f2238ea43dd599f1c607e860e0f52175ef714a83e5d2c1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 18:59:21,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 18:59:21,678 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 18:59:21,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 18:59:21,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 18:59:21,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 18:59:21,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 18:59:21,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 18:59:21,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 18:59:21,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 18:59:21,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 18:59:21,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 18:59:21,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 18:59:21,766 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 18:59:21,770 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 18:59:21,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 18:59:21,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 18:59:21,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 18:59:21,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 18:59:21,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 18:59:21,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 18:59:21,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 18:59:21,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 18:59:21,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 18:59:21,802 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 18:59:21,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 18:59:21,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 18:59:21,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 18:59:21,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 18:59:21,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 18:59:21,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 18:59:21,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 18:59:21,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 18:59:21,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 18:59:21,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 18:59:21,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 18:59:21,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 18:59:21,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 18:59:21,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 18:59:21,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 18:59:21,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 18:59:21,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 18:59:21,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 18:59:21,861 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 18:59:21,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 18:59:21,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 18:59:21,869 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 18:59:21,869 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 18:59:21,869 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 18:59:21,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 18:59:21,870 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 18:59:21,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 18:59:21,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 18:59:21,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 18:59:21,872 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 18:59:21,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 18:59:21,872 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 18:59:21,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 18:59:21,873 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 18:59:21,873 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 18:59:21,873 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 18:59:21,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 18:59:21,874 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 18:59:21,874 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 18:59:21,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 18:59:21,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 18:59:21,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 18:59:21,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 18:59:21,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 18:59:21,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 18:59:21,875 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 18:59:21,877 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 18:59:21,877 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 18:59:21,877 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 18:59:21,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64dc8b0c2e0759b706f2238ea43dd599f1c607e860e0f52175ef714a83e5d2c1 [2021-10-21 18:59:22,202 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 18:59:22,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 18:59:22,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 18:59:22,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 18:59:22,244 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 18:59:22,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loop-acceleration/const_1-1.c [2021-10-21 18:59:22,313 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/data/c0606ba60/1cdd088c679d4e1ea35d659965e7c6fa/FLAGc01fa59a8 [2021-10-21 18:59:22,726 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 18:59:22,727 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/sv-benchmarks/c/loop-acceleration/const_1-1.c [2021-10-21 18:59:22,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/data/c0606ba60/1cdd088c679d4e1ea35d659965e7c6fa/FLAGc01fa59a8 [2021-10-21 18:59:23,135 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/data/c0606ba60/1cdd088c679d4e1ea35d659965e7c6fa [2021-10-21 18:59:23,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 18:59:23,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 18:59:23,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 18:59:23,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 18:59:23,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 18:59:23,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f0dd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23, skipping insertion in model container [2021-10-21 18:59:23,146 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 18:59:23,165 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 18:59:23,320 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/sv-benchmarks/c/loop-acceleration/const_1-1.c[321,334] [2021-10-21 18:59:23,332 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 18:59:23,344 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 18:59:23,356 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/sv-benchmarks/c/loop-acceleration/const_1-1.c[321,334] [2021-10-21 18:59:23,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 18:59:23,371 INFO L208 MainTranslator]: Completed translation [2021-10-21 18:59:23,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23 WrapperNode [2021-10-21 18:59:23,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 18:59:23,373 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 18:59:23,373 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 18:59:23,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 18:59:23,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 18:59:23,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 18:59:23,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 18:59:23,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 18:59:23,413 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,415 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,415 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,421 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,424 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 18:59:23,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 18:59:23,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 18:59:23,425 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 18:59:23,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (1/1) ... [2021-10-21 18:59:23,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 18:59:23,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 18:59:23,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 18:59:23,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 18:59:23,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 18:59:23,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 18:59:23,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 18:59:23,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 18:59:23,656 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 18:59:23,657 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-21 18:59:23,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 06:59:23 BoogieIcfgContainer [2021-10-21 18:59:23,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 18:59:23,661 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 18:59:23,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 18:59:23,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 18:59:23,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 06:59:23" (1/3) ... [2021-10-21 18:59:23,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 06:59:23, skipping insertion in model container [2021-10-21 18:59:23,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 06:59:23" (2/3) ... [2021-10-21 18:59:23,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@202e1c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 06:59:23, skipping insertion in model container [2021-10-21 18:59:23,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 06:59:23" (3/3) ... [2021-10-21 18:59:23,669 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2021-10-21 18:59:23,674 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 18:59:23,675 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 18:59:23,743 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 18:59:23,749 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 18:59:23,750 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 18:59:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-21 18:59:23,767 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 18:59:23,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-21 18:59:23,768 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 18:59:23,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 18:59:23,774 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-21 18:59:23,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 18:59:23,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488819319] [2021-10-21 18:59:23,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 18:59:23,784 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 18:59:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 18:59:24,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:24,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 18:59:24,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488819319] [2021-10-21 18:59:24,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488819319] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 18:59:24,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 18:59:24,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 18:59:24,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894916688] [2021-10-21 18:59:24,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 18:59:24,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 18:59:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 18:59:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 18:59:24,036 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.5) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 18:59:24,056 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-10-21 18:59:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 18:59:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-21 18:59:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 18:59:24,066 INFO L225 Difference]: With dead ends: 18 [2021-10-21 18:59:24,066 INFO L226 Difference]: Without dead ends: 8 [2021-10-21 18:59:24,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 18:59:24,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-21 18:59:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-21 18:59:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-21 18:59:24,102 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-21 18:59:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 18:59:24,104 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-21 18:59:24,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,105 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-21 18:59:24,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-21 18:59:24,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 18:59:24,106 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-21 18:59:24,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 18:59:24,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 18:59:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 18:59:24,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-10-21 18:59:24,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 18:59:24,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629439447] [2021-10-21 18:59:24,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 18:59:24,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 18:59:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 18:59:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:24,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 18:59:24,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629439447] [2021-10-21 18:59:24,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629439447] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 18:59:24,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215768784] [2021-10-21 18:59:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 18:59:24,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:24,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 18:59:24,239 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 18:59:24,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 18:59:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 18:59:24,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 18:59:24,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 18:59:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:24,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215768784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 18:59:24,349 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 18:59:24,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-21 18:59:24,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658047328] [2021-10-21 18:59:24,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 18:59:24,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 18:59:24,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 18:59:24,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 18:59:24,353 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 18:59:24,365 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-21 18:59:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 18:59:24,366 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-21 18:59:24,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 18:59:24,367 INFO L225 Difference]: With dead ends: 13 [2021-10-21 18:59:24,367 INFO L226 Difference]: Without dead ends: 9 [2021-10-21 18:59:24,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 18:59:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-21 18:59:24,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-21 18:59:24,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-21 18:59:24,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-21 18:59:24,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 18:59:24,371 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-21 18:59:24,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,372 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-21 18:59:24,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-21 18:59:24,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 18:59:24,373 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-21 18:59:24,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 18:59:24,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:24,593 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 18:59:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 18:59:24,593 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-10-21 18:59:24,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 18:59:24,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878018692] [2021-10-21 18:59:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 18:59:24,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 18:59:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 18:59:24,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:24,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 18:59:24,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878018692] [2021-10-21 18:59:24,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878018692] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 18:59:24,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425832260] [2021-10-21 18:59:24,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 18:59:24,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:24,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 18:59:24,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 18:59:24,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 18:59:24,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 18:59:24,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 18:59:24,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 18:59:24,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 18:59:24,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:24,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425832260] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 18:59:24,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 18:59:24,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-21 18:59:24,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414808039] [2021-10-21 18:59:24,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 18:59:24,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 18:59:24,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 18:59:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 18:59:24,928 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 18:59:24,958 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-21 18:59:24,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 18:59:24,959 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-21 18:59:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 18:59:24,960 INFO L225 Difference]: With dead ends: 14 [2021-10-21 18:59:24,960 INFO L226 Difference]: Without dead ends: 10 [2021-10-21 18:59:24,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.9ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-21 18:59:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-21 18:59:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-21 18:59:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-21 18:59:24,965 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-10-21 18:59:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 18:59:24,965 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-21 18:59:24,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-21 18:59:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-21 18:59:24,966 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 18:59:24,966 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-21 18:59:25,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 18:59:25,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:25,186 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 18:59:25,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 18:59:25,186 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-10-21 18:59:25,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 18:59:25,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379046128] [2021-10-21 18:59:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 18:59:25,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 18:59:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 18:59:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 18:59:25,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 18:59:25,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379046128] [2021-10-21 18:59:25,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379046128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 18:59:25,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131771727] [2021-10-21 18:59:25,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 18:59:25,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:25,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 18:59:25,274 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 18:59:25,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 18:59:25,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 18:59:25,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 18:59:25,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 18:59:25,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 18:59:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-21 18:59:25,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131771727] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 18:59:25,406 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 18:59:25,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-10-21 18:59:25,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280153654] [2021-10-21 18:59:25,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 18:59:25,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 18:59:25,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 18:59:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-21 18:59:25,409 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 18:59:25,422 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-10-21 18:59:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 18:59:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-21 18:59:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 18:59:25,422 INFO L225 Difference]: With dead ends: 10 [2021-10-21 18:59:25,423 INFO L226 Difference]: Without dead ends: 0 [2021-10-21 18:59:25,424 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-21 18:59:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-21 18:59:25,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-21 18:59:25,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-21 18:59:25,425 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2021-10-21 18:59:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 18:59:25,425 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-21 18:59:25,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 18:59:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-21 18:59:25,426 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-21 18:59:25,428 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 18:59:25,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 18:59:25,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 18:59:25,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-21 18:59:25,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 18:59:25,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-21 18:59:25,647 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-21 18:59:25,647 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-21 18:59:25,647 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-21 18:59:25,648 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-21 18:59:25,648 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-21 18:59:25,648 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-21 18:59:25,648 INFO L853 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (= ULTIMATE.start_main_~y~0 0) (= ULTIMATE.start_main_~x~0 0)) [2021-10-21 18:59:25,649 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2021-10-21 18:59:25,649 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-21 18:59:25,649 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2021-10-21 18:59:25,654 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 18:59:25,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 06:59:25 BoogieIcfgContainer [2021-10-21 18:59:25,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 18:59:25,667 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 18:59:25,667 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 18:59:25,667 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 18:59:25,668 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 06:59:23" (3/4) ... [2021-10-21 18:59:25,671 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-21 18:59:25,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-21 18:59:25,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-21 18:59:25,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 18:59:25,681 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-21 18:59:25,711 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 18:59:25,712 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 18:59:25,713 INFO L168 Benchmark]: Toolchain (without parser) took 2573.91 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 69.1 MB in the beginning and 95.6 MB in the end (delta: -26.5 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,714 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 85.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 18:59:25,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.37 ms. Allocated memory is still 109.1 MB. Free memory was 68.9 MB in the beginning and 83.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,715 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.20 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,716 INFO L168 Benchmark]: Boogie Preprocessor took 18.86 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 81.6 MB in the end (delta: 919.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 18:59:25,716 INFO L168 Benchmark]: RCFGBuilder took 234.51 ms. Allocated memory is still 109.1 MB. Free memory was 81.2 MB in the beginning and 72.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,717 INFO L168 Benchmark]: TraceAbstraction took 2005.32 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.8 MB in the beginning and 97.7 MB in the end (delta: -25.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,717 INFO L168 Benchmark]: Witness Printer took 44.98 ms. Allocated memory is still 144.7 MB. Free memory was 97.7 MB in the beginning and 95.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 18:59:25,720 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 109.1 MB. Free memory is still 85.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.37 ms. Allocated memory is still 109.1 MB. Free memory was 68.9 MB in the beginning and 83.8 MB in the end (delta: -14.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.20 ms. Allocated memory is still 109.1 MB. Free memory was 83.8 MB in the beginning and 82.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.86 ms. Allocated memory is still 109.1 MB. Free memory was 82.5 MB in the beginning and 81.6 MB in the end (delta: 919.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 234.51 ms. Allocated memory is still 109.1 MB. Free memory was 81.2 MB in the beginning and 72.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2005.32 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 71.8 MB in the beginning and 97.7 MB in the end (delta: -25.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 16.1 GB. * Witness Printer took 44.98 ms. Allocated memory is still 144.7 MB. Free memory was 97.7 MB in the beginning and 95.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1912.5ms, OverallIterations: 4, TraceHistogramMax: 3, EmptinessCheckTime: 10.4ms, AutomataDifference: 116.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 16.9ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 1 SDslu, 33 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 31.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 118.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, InterpolantAutomatonStates: 16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 8 HoareAnnotationTreeSize, 2 FomulaSimplifications, 23 FormulaSimplificationTreeSizeReduction, 7.2ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 27.7ms SsaConstructionTime, 147.6ms SatisfiabilityAnalysisTime, 615.1ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 53 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 47 ConstructedInterpolants, 0 QuantifiedInterpolants, 127 SizeOfPredicates, 5 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: y == 0 || x == 0 RESULT: Ultimate proved your program to be correct! [2021-10-21 18:59:25,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_408e837d-873e-42df-be1d-c518fbc3783c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...