./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2879b5362dad4ee344e02d12e11f7b45d4f36399 ........................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2879b5362dad4ee344e02d12e11f7b45d4f36399 ................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:52:54,182 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:52:54,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:52:54,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:52:54,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:52:54,238 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:52:54,240 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:52:54,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:52:54,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:52:54,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:52:54,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:52:54,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:52:54,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:52:54,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:52:54,262 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:52:54,269 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:52:54,270 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:52:54,271 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:52:54,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:52:54,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:52:54,285 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:52:54,286 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:52:54,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:52:54,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:52:54,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:52:54,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:52:54,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:52:54,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:52:54,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:52:54,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:52:54,298 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:52:54,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:52:54,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:52:54,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:52:54,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:52:54,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:52:54,302 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:52:54,302 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:52:54,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:52:54,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:52:54,304 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:52:54,305 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:52:54,332 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:52:54,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:52:54,333 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:52:54,334 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:52:54,334 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:52:54,334 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:52:54,334 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:52:54,334 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:52:54,335 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:52:54,335 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:52:54,335 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:52:54,335 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:52:54,335 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:52:54,336 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:52:54,336 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:52:54,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:52:54,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:52:54,337 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:52:54,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:52:54,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:52:54,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:52:54,338 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:52:54,338 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:52:54,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:52:54,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:52:54,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:52:54,339 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:52:54,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:52:54,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:52:54,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:52:54,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:54,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:52:54,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:52:54,340 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:52:54,340 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:52:54,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:52:54,341 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:52:54,341 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:52:54,341 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:52:54,341 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2879b5362dad4ee344e02d12e11f7b45d4f36399 [2021-10-13 06:52:54,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:52:54,601 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:52:54,603 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:52:54,605 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:52:54,606 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:52:54,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2021-10-13 06:52:54,674 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/06d660fc6/16b922df5ec345eb80d0c5d4590e42a7/FLAGb95c9c07a [2021-10-13 06:52:55,188 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:52:55,190 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2021-10-13 06:52:55,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/06d660fc6/16b922df5ec345eb80d0c5d4590e42a7/FLAGb95c9c07a [2021-10-13 06:52:55,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/06d660fc6/16b922df5ec345eb80d0c5d4590e42a7 [2021-10-13 06:52:55,578 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:52:55,580 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:52:55,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:55,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:52:55,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:52:55,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c03e135 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55, skipping insertion in model container [2021-10-13 06:52:55,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:52:55,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:52:55,774 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2021-10-13 06:52:55,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:55,791 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:52:55,801 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2021-10-13 06:52:55,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:55,814 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:52:55,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55 WrapperNode [2021-10-13 06:52:55,815 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:55,815 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:55,815 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:52:55,816 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:52:55,821 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:55,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:52:55,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:52:55,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:52:55,850 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,852 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,852 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:52:55,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:52:55,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:52:55,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:52:55,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:55,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:55,901 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:52:55,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:52:55,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:52:55,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:52:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:52:55,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:52:56,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:52:56,137 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:52:56,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:56 BoogieIcfgContainer [2021-10-13 06:52:56,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:52:56,150 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:52:56,150 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:52:56,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:52:56,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:55" (1/3) ... [2021-10-13 06:52:56,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7574c1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:56, skipping insertion in model container [2021-10-13 06:52:56,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55" (2/3) ... [2021-10-13 06:52:56,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7574c1e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:56, skipping insertion in model container [2021-10-13 06:52:56,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:56" (3/3) ... [2021-10-13 06:52:56,163 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2021-10-13 06:52:56,168 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:52:56,168 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:52:56,241 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:52:56,248 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:52:56,248 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:52:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) [2021-10-13 06:52:56,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 06:52:56,269 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:56,270 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 06:52:56,270 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:56,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:56,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1818790, now seen corresponding path program 1 times [2021-10-13 06:52:56,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:56,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704798068] [2021-10-13 06:52:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:56,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:56,576 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:56,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704798068] [2021-10-13 06:52:56,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704798068] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:56,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:56,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 06:52:56,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339293036] [2021-10-13 06:52:56,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:52:56,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:52:56,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:56,602 INFO L87 Difference]: Start difference. First operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 6 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) Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 06:52:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:56,643 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-13 06:52:56,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:52:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-10-13 06:52:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:56,655 INFO L225 Difference]: With dead ends: 13 [2021-10-13 06:52:56,655 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 06:52:56,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:56,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 06:52:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 06:52:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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) [2021-10-13 06:52:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 06:52:56,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-13 06:52:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:56,703 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 06:52:56,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 06:52:56,704 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 06:52:56,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 06:52:56,704 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:56,705 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 06:52:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 06:52:56,705 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash 55770291, now seen corresponding path program 1 times [2021-10-13 06:52:56,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:56,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009760627] [2021-10-13 06:52:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:56,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:56,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:56,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009760627] [2021-10-13 06:52:56,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009760627] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 06:52:56,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634973662] [2021-10-13 06:52:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:56,869 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:56,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:56,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:56,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:52:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:56,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:52:56,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:56,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:57,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:57,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634973662] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:57,048 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2115537715] [2021-10-13 06:52:57,069 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-13 06:52:57,070 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:52:57,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:52:57,080 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:52:57,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:52:57,109 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,117 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:57,118 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,119 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 06:52:57,120 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:57,121 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,121 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 06:52:57,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 06:52:57,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:57,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:57,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:57,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 06:52:57,199 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,201 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:52:57,205 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,206 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 06:52:57,207 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:52:57,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:52:57,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,261 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:57,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 06:52:57,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:52:57,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:125 [2021-10-13 06:52:57,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:57,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-13 06:52:57,491 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_10| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 06:52:57,497 INFO L168 Benchmark]: Toolchain (without parser) took 1915.03 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 75.5 MB in the beginning and 105.0 MB in the end (delta: -29.5 MB). Peak memory consumption was 15.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:57,497 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:52:57,498 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.38 ms. Allocated memory is still 104.9 MB. Free memory was 75.3 MB in the beginning and 80.6 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:57,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.86 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:57,500 INFO L168 Benchmark]: Boogie Preprocessor took 18.29 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 78.5 MB in the end (delta: 830.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:52:57,500 INFO L168 Benchmark]: RCFGBuilder took 279.39 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 68.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:57,501 INFO L168 Benchmark]: TraceAbstraction took 1344.25 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 68.0 MB in the beginning and 105.0 MB in the end (delta: -37.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:57,505 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 104.9 MB. Free memory is still 59.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 233.38 ms. Allocated memory is still 104.9 MB. Free memory was 75.3 MB in the beginning and 80.6 MB in the end (delta: -5.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.86 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.29 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 78.5 MB in the end (delta: 830.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.39 ms. Allocated memory is still 104.9 MB. Free memory was 78.1 MB in the beginning and 68.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1344.25 ms. Allocated memory was 104.9 MB in the beginning and 151.0 MB in the end (delta: 46.1 MB). Free memory was 68.0 MB in the beginning and 105.0 MB in the end (delta: -37.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_10| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_10|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 06:52:57,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 06:53:00,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:53:00,028 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:53:00,058 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:53:00,059 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:53:00,060 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:53:00,062 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:53:00,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:53:00,067 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:53:00,068 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:53:00,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:53:00,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:53:00,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:53:00,072 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:53:00,073 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:53:00,075 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:53:00,076 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:53:00,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:53:00,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:53:00,082 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:53:00,084 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:53:00,089 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:53:00,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:53:00,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:53:00,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:53:00,099 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:53:00,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:53:00,103 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:53:00,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:53:00,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:53:00,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:53:00,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:53:00,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:53:00,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:53:00,109 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:53:00,109 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:53:00,110 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:53:00,110 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:53:00,111 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:53:00,112 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:53:00,112 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:53:00,122 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:53:00,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:53:00,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:53:00,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:53:00,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:53:00,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:53:00,170 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:53:00,171 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:53:00,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:53:00,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:53:00,173 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:53:00,174 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:53:00,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:53:00,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:53:00,174 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:53:00,175 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:53:00,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:53:00,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:53:00,176 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:53:00,176 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:53:00,176 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:53:00,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:53:00,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:53:00,177 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:53:00,177 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:53:00,177 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:53:00,178 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:53:00,178 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:00,178 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:53:00,178 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:53:00,178 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:53:00,179 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2879b5362dad4ee344e02d12e11f7b45d4f36399 [2021-10-13 06:53:00,543 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:53:00,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:53:00,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:53:00,569 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:53:00,570 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:53:00,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2021-10-13 06:53:00,648 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/321f44919/031e6b1fe6e44cdebf712c0e8c46324b/FLAG9fb444843 [2021-10-13 06:53:01,230 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:53:01,231 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c [2021-10-13 06:53:01,237 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/321f44919/031e6b1fe6e44cdebf712c0e8c46324b/FLAG9fb444843 [2021-10-13 06:53:01,581 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/data/321f44919/031e6b1fe6e44cdebf712c0e8c46324b [2021-10-13 06:53:01,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:53:01,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:53:01,587 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:53:01,587 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:53:01,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:53:01,591 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,592 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fb996 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01, skipping insertion in model container [2021-10-13 06:53:01,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,599 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:53:01,611 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:53:01,742 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2021-10-13 06:53:01,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:53:01,764 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:53:01,774 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_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/sv-benchmarks/c/loop-acceleration/underapprox_2-1.c[327,340] [2021-10-13 06:53:01,776 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:53:01,789 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:53:01,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01 WrapperNode [2021-10-13 06:53:01,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:53:01,791 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:53:01,791 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:53:01,791 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:53:01,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:53:01,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:53:01,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:53:01,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:53:01,838 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,857 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,866 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:53:01,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:53:01,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:53:01,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:53:01,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (1/1) ... [2021-10-13 06:53:01,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:53:01,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:01,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:53:01,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:53:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:53:01,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:53:01,965 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:53:01,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:53:02,153 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:53:02,154 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 06:53:02,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:53:02 BoogieIcfgContainer [2021-10-13 06:53:02,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:53:02,158 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:53:02,158 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:53:02,161 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:53:02,161 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:53:01" (1/3) ... [2021-10-13 06:53:02,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c952f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:53:02, skipping insertion in model container [2021-10-13 06:53:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:53:01" (2/3) ... [2021-10-13 06:53:02,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c952f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:53:02, skipping insertion in model container [2021-10-13 06:53:02,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:53:02" (3/3) ... [2021-10-13 06:53:02,165 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c [2021-10-13 06:53:02,171 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:53:02,171 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:53:02,221 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:53:02,228 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 06:53:02,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:53:02,243 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) [2021-10-13 06:53:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 06:53:02,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:02,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 06:53:02,249 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:02,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:02,255 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-13 06:53:02,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:02,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616238386] [2021-10-13 06:53:02,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:02,269 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:02,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:02,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:02,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:53:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 06:53:02,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:02,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:02,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:02,507 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:02,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616238386] [2021-10-13 06:53:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616238386] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:53:02,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:53:02,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:53:02,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824185318] [2021-10-13 06:53:02,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:53:02,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:02,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:53:02,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:53:02,530 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 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) [2021-10-13 06:53:02,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:02,580 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-10-13 06:53:02,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:53:02,582 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 6 [2021-10-13 06:53:02,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:02,589 INFO L225 Difference]: With dead ends: 19 [2021-10-13 06:53:02,596 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 06:53:02,599 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:53:02,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 06:53:02,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 06:53:02,631 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) [2021-10-13 06:53:02,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 06:53:02,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-10-13 06:53:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:02,634 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 06:53:02,635 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) [2021-10-13 06:53:02,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 06:53:02,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:53:02,636 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:02,636 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-13 06:53:02,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:02,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:02,848 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:02,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:02,850 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2021-10-13 06:53:02,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:02,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902117361] [2021-10-13 06:53:02,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:02,851 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:02,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:02,853 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:02,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:53:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:02,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:53:02,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:02,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:03,075 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:03,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902117361] [2021-10-13 06:53:03,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902117361] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:03,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1561934536] [2021-10-13 06:53:03,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:03,076 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:03,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:03,083 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:03,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 06:53:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 06:53:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:03,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:03,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:03,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:03,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1561934536] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:03,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745370850] [2021-10-13 06:53:03,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:03,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:03,248 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:53:03,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:53:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:03,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 06:53:03,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:03,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:03,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:03,485 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:53:03,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745370850] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:03,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:53:03,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 13 [2021-10-13 06:53:03,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560937669] [2021-10-13 06:53:03,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 06:53:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:03,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 06:53:03,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-10-13 06:53:03,502 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:03,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:03,610 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-10-13 06:53:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 06:53:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 06:53:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:03,612 INFO L225 Difference]: With dead ends: 17 [2021-10-13 06:53:03,612 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 06:53:03,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 06:53:03,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 06:53:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 06:53:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-13 06:53:03,622 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-10-13 06:53:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:03,622 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-13 06:53:03,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 06:53:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-13 06:53:03,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:53:03,624 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:03,625 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-13 06:53:03,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:03,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:04,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 06:53:04,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:04,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:04,248 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 2 times [2021-10-13 06:53:04,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:04,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099280096] [2021-10-13 06:53:04,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:53:04,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:04,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:04,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:53:04,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:53:04,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 06:53:04,339 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 06:53:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 06:53:04,388 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 06:53:04,388 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 06:53:04,389 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 06:53:04,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 06:53:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:04,597 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 06:53:04,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 06:53:04 BoogieIcfgContainer [2021-10-13 06:53:04,635 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 06:53:04,637 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 06:53:04,637 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 06:53:04,637 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 06:53:04,638 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:53:02" (3/4) ... [2021-10-13 06:53:04,640 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 06:53:04,715 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 06:53:04,719 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 06:53:04,721 INFO L168 Benchmark]: Toolchain (without parser) took 3134.87 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 48.3 MB in the beginning and 62.5 MB in the end (delta: -14.2 MB). Peak memory consumption was 11.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,722 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:53:04,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 203.87 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 38.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.25 ms. Allocated memory is still 67.1 MB. Free memory was 38.6 MB in the beginning and 51.7 MB in the end (delta: -13.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,724 INFO L168 Benchmark]: Boogie Preprocessor took 38.76 ms. Allocated memory is still 67.1 MB. Free memory was 51.7 MB in the beginning and 50.7 MB in the end (delta: 997.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,725 INFO L168 Benchmark]: RCFGBuilder took 286.43 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 41.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,726 INFO L168 Benchmark]: TraceAbstraction took 2478.30 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 41.1 MB in the beginning and 64.6 MB in the end (delta: -23.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,726 INFO L168 Benchmark]: Witness Printer took 82.74 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 62.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:53:04,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 49.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 203.87 ms. Allocated memory is still 67.1 MB. Free memory was 48.2 MB in the beginning and 38.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.25 ms. Allocated memory is still 67.1 MB. Free memory was 38.6 MB in the beginning and 51.7 MB in the end (delta: -13.1 MB). Peak memory consumption was 5.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.76 ms. Allocated memory is still 67.1 MB. Free memory was 51.7 MB in the beginning and 50.7 MB in the end (delta: 997.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 286.43 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 41.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2478.30 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 41.1 MB in the beginning and 64.6 MB in the end (delta: -23.5 MB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Witness Printer took 82.74 ms. Allocated memory is still 94.4 MB. Free memory was 64.6 MB in the beginning and 62.5 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 - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 [L16] COND FALSE !(x < 6) [L6] COND TRUE !(cond) [L7] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2376.2ms, OverallIterations: 3, TraceHistogramMax: 6, EmptinessCheckTime: 10.8ms, AutomataDifference: 195.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 14 SDtfs, 6 SDslu, 29 SDs, 0 SdLazy, 40 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 44.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 166.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 25.8ms AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 39.9ms SsaConstructionTime, 120.8ms SatisfiabilityAnalysisTime, 559.8ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 113 SizeOfPredicates, 6 NumberOfNonLiveVariables, 130 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/18 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! [2021-10-13 06:53:04,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_00de62f3-37f7-4d81-aa7f-7c81f41bcbd8/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...