./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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 992b306a3a5a9eaa476c1e842c528615cb39ce06 ........................................................................................................................................................................................................................................................................................................................................................ 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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 992b306a3a5a9eaa476c1e842c528615cb39ce06 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:07:55,118 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:07:55,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:07:55,178 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:07:55,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:07:55,183 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:07:55,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:07:55,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:07:55,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:07:55,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:07:55,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:07:55,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:07:55,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:07:55,204 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:07:55,207 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:07:55,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:07:55,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:07:55,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:07:55,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:07:55,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:07:55,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:07:55,229 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:07:55,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:07:55,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:07:55,242 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:07:55,242 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:07:55,243 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:07:55,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:07:55,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:07:55,247 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:07:55,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:07:55,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:07:55,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:07:55,251 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:07:55,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:07:55,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:07:55,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:07:55,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:07:55,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:07:55,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:07:55,257 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:07:55,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:07:55,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:07:55,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:07:55,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:07:55,304 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:07:55,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:07:55,305 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:07:55,305 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:07:55,305 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:07:55,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:07:55,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:07:55,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:07:55,313 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:07:55,313 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:07:55,313 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:07:55,313 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:07:55,314 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:07:55,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:07:55,315 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:07:55,315 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:07:55,315 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:07:55,315 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:07:55,315 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:07:55,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:07:55,316 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:07:55,316 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:07:55,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:07:55,316 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:07:55,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:07:55,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:07:55,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:07:55,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:07:55,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:07:55,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:07:55,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:07:55,320 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:07:55,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:07:55,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:07:55,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:07:55,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:07:55,321 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992b306a3a5a9eaa476c1e842c528615cb39ce06 [2021-10-13 07:07:55,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:07:55,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:07:55,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:07:55,670 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:07:55,671 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:07:55,672 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-13 07:07:55,758 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/e134048f4/5d88880d9b3e43e498d1455fd40c5e01/FLAG6bfc73e35 [2021-10-13 07:07:56,203 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:07:56,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-13 07:07:56,210 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/e134048f4/5d88880d9b3e43e498d1455fd40c5e01/FLAG6bfc73e35 [2021-10-13 07:07:56,616 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/e134048f4/5d88880d9b3e43e498d1455fd40c5e01 [2021-10-13 07:07:56,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:07:56,620 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:07:56,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:07:56,635 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:07:56,639 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:07:56,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617871e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56, skipping insertion in model container [2021-10-13 07:07:56,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,653 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:07:56,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:07:56,821 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-13 07:07:56,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:07:56,861 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:07:56,871 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-13 07:07:56,876 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:07:56,889 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:07:56,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56 WrapperNode [2021-10-13 07:07:56,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:07:56,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:07:56,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:07:56,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:07:56,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,905 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:07:56,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:07:56,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:07:56,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:07:56,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,947 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:07:56,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:07:56,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:07:56,950 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:07:56,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (1/1) ... [2021-10-13 07:07:56,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:07:56,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:07:56,994 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:07:57,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:07:57,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:07:57,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:07:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:07:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:07:57,344 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:07:57,344 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:07:57,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:07:57 BoogieIcfgContainer [2021-10-13 07:07:57,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:07:57,348 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:07:57,348 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:07:57,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:07:57,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:07:56" (1/3) ... [2021-10-13 07:07:57,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dff8b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:07:57, skipping insertion in model container [2021-10-13 07:07:57,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:07:56" (2/3) ... [2021-10-13 07:07:57,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dff8b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:07:57, skipping insertion in model container [2021-10-13 07:07:57,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:07:57" (3/3) ... [2021-10-13 07:07:57,355 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2021-10-13 07:07:57,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:07:57,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:07:57,406 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:07:57,412 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 07:07:57,413 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:07:57,426 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 07:07:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:07:57,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:57,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:07:57,438 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:07:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:57,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1818790, now seen corresponding path program 1 times [2021-10-13 07:07:57,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:07:57,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414528034] [2021-10-13 07:07:57,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:57,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:07:57,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:57,671 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 07:07:57,671 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:07:57,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414528034] [2021-10-13 07:07:57,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414528034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:07:57,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:07:57,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:07:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83558923] [2021-10-13 07:07:57,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:07:57,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:07:57,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:07:57,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:07:57,695 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 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 07:07:57,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:07:57,715 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-13 07:07:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:07:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 07:07:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:07:57,724 INFO L225 Difference]: With dead ends: 13 [2021-10-13 07:07:57,724 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 07:07:57,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:07:57,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 07:07:57,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 07:07:57,749 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 07:07:57,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 07:07:57,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-13 07:07:57,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:07:57,751 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 07:07:57,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 07:07:57,751 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 07:07:57,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:07:57,751 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:07:57,752 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:07:57,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:07:57,752 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:07:57,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:07:57,753 INFO L82 PathProgramCache]: Analyzing trace with hash 55770291, now seen corresponding path program 1 times [2021-10-13 07:07:57,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:07:57,754 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525753378] [2021-10-13 07:07:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:57,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:07:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:57,850 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 07:07:57,851 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:07:57,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525753378] [2021-10-13 07:07:57,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525753378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:07:57,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742826410] [2021-10-13 07:07:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:07:57,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:07:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:07:57,854 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:07:57,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:07:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:07:57,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:07:57,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:07:57,985 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 07:07:57,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:07:58,060 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 07:07:58,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742826410] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:07:58,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2099087739] [2021-10-13 07:07:58,097 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-13 07:07:58,098 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:07:58,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:07:58,115 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:07:58,116 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:07:58,176 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,188 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:07:58,190 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,191 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:07:58,192 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:07:58,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,194 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:07:58,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 07:07:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:58,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:07:58,252 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 07:07:58,255 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,259 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:07:58,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:07:58,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:07:58,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:07:58,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,328 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:07:58,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-13 07:07:58,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:07:58,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:122, output treesize:125 [2021-10-13 07:07:58,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:07:58,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:07:58,553 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 07:07:58,556 INFO L168 Benchmark]: Toolchain (without parser) took 1934.77 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 62.0 MB in the beginning and 105.4 MB in the end (delta: -43.4 MB). Peak memory consumption was 3.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:58,557 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:07:58,558 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.08 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 72.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:58,558 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 70.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:58,559 INFO L168 Benchmark]: Boogie Preprocessor took 18.06 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 70.1 MB in the end (delta: 862.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:07:58,560 INFO L168 Benchmark]: RCFGBuilder took 396.99 ms. Allocated memory is still 96.5 MB. Free memory was 70.1 MB in the beginning and 60.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:58,560 INFO L168 Benchmark]: TraceAbstraction took 1206.66 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 59.7 MB in the beginning and 105.4 MB in the end (delta: -45.7 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:07:58,564 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory was 66.5 MB in the beginning and 66.5 MB in the end (delta: 28.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 255.08 ms. Allocated memory is still 96.5 MB. Free memory was 61.8 MB in the beginning and 72.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.72 ms. Allocated memory is still 96.5 MB. Free memory was 72.6 MB in the beginning and 70.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 18.06 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 70.1 MB in the end (delta: 862.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 396.99 ms. Allocated memory is still 96.5 MB. Free memory was 70.1 MB in the beginning and 60.1 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1206.66 ms. Allocated memory was 96.5 MB in the beginning and 144.7 MB in the end (delta: 48.2 MB). Free memory was 59.7 MB in the beginning and 105.4 MB in the end (delta: -45.7 MB). Peak memory consumption was 4.6 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 07:07:58,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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 07:08:01,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:08:01,128 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:08:01,183 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:08:01,184 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:08:01,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:08:01,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:08:01,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:08:01,199 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:08:01,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:08:01,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:08:01,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:08:01,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:08:01,218 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:08:01,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:08:01,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:08:01,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:08:01,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:08:01,231 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:08:01,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:08:01,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:08:01,243 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:08:01,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:08:01,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:08:01,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:08:01,254 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:08:01,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:08:01,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:08:01,257 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:08:01,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:08:01,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:08:01,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:08:01,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:08:01,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:08:01,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:08:01,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:08:01,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:08:01,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:08:01,279 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:08:01,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:08:01,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:08:01,282 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:08:01,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:08:01,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:08:01,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:08:01,330 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:08:01,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:08:01,330 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:08:01,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:08:01,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:08:01,331 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:08:01,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:08:01,334 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:08:01,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:08:01,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:08:01,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:08:01,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:08:01,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:08:01,335 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:08:01,336 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:08:01,336 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:08:01,336 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:08:01,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:08:01,337 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:08:01,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:08:01,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:08:01,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:08:01,338 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:08:01,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:01,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:08:01,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:08:01,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:08:01,339 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:08:01,339 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:01,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:08:01,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:08:01,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:08:01,340 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992b306a3a5a9eaa476c1e842c528615cb39ce06 [2021-10-13 07:08:01,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:08:01,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:08:01,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:08:01,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:08:01,792 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:08:01,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-13 07:08:01,862 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/1d01927cf/6efb6a00839c436783142eb39083ae3f/FLAGbe4efd2ea [2021-10-13 07:08:02,361 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:08:02,361 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-13 07:08:02,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/1d01927cf/6efb6a00839c436783142eb39083ae3f/FLAGbe4efd2ea [2021-10-13 07:08:02,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/data/1d01927cf/6efb6a00839c436783142eb39083ae3f [2021-10-13 07:08:02,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:08:02,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:08:02,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:02,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:08:02,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:08:02,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:02,720 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5daf5035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02, skipping insertion in model container [2021-10-13 07:08:02,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:02,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:08:02,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:08:02,865 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-13 07:08:02,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:02,914 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:08:02,934 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_94801b9f-22df-44d3-8c5c-4d9a0af8a263/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-13 07:08:02,938 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:08:02,954 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:08:02,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02 WrapperNode [2021-10-13 07:08:02,955 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:08:02,956 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:02,956 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:08:02,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:08:02,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:02,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,000 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:08:03,001 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:08:03,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:08:03,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:08:03,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,045 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:08:03,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:08:03,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:08:03,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:08:03,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (1/1) ... [2021-10-13 07:08:03,068 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:08:03,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:03,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:08:03,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:08:03,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:08:03,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:08:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:08:03,144 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:08:03,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:08:03,410 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 07:08:03,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:03 BoogieIcfgContainer [2021-10-13 07:08:03,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:08:03,413 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:08:03,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:08:03,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:08:03,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:08:02" (1/3) ... [2021-10-13 07:08:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214b645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:03, skipping insertion in model container [2021-10-13 07:08:03,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:08:02" (2/3) ... [2021-10-13 07:08:03,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1214b645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:08:03, skipping insertion in model container [2021-10-13 07:08:03,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:03" (3/3) ... [2021-10-13 07:08:03,423 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2021-10-13 07:08:03,428 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:08:03,429 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:08:03,488 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:08:03,498 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 07:08:03,498 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:08:03,513 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 07:08:03,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:08:03,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:03,524 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:08:03,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:03,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:03,540 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-13 07:08:03,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:03,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099831884] [2021-10-13 07:08:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:03,553 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:03,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:03,559 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:03,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:08:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:03,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:08:03,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:03,797 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 07:08:03,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:03,838 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 07:08:03,839 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:03,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099831884] [2021-10-13 07:08:03,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099831884] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:08:03,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:08:03,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:08:03,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294799751] [2021-10-13 07:08:03,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:08:03,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:03,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:08:03,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:03,866 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 07:08:03,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:03,901 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-10-13 07:08:03,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:08:03,903 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 07:08:03,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:03,911 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:08:03,912 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:08:03,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:08:03,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:08:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:08:03,964 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 07:08:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 07:08:03,966 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-10-13 07:08:03,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:03,967 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 07:08:03,967 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 07:08:03,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 07:08:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:08:03,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:03,968 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:04,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 07:08:04,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:08:04,190 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:04,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:04,191 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 1 times [2021-10-13 07:08:04,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:04,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [184571135] [2021-10-13 07:08:04,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:04,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:04,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:04,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:04,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:08:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:04,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:08:04,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:04,330 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 07:08:04,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:04,394 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 07:08:04,395 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:04,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [184571135] [2021-10-13 07:08:04,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [184571135] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:04,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1274312947] [2021-10-13 07:08:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:04,396 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:04,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:04,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2021-10-13 07:08:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:04,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:08:04,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:04,686 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 07:08:04,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:04,728 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 07:08:04,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1274312947] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:04,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454153998] [2021-10-13 07:08:04,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:08:04,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:04,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:04,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:04,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 07:08:04,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:08:04,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:08:04,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:04,984 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 07:08:04,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:06,487 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 07:08:06,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454153998] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:06,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:06,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 16 [2021-10-13 07:08:06,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635341684] [2021-10-13 07:08:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:08:06,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:06,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:08:06,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:08:06,492 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 07:08:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:10,398 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2021-10-13 07:08:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:08:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 07:08:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:10,400 INFO L225 Difference]: With dead ends: 17 [2021-10-13 07:08:10,400 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:08:10,402 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 4633.1ms TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:08:10,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:08:10,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 07:08:10,406 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 07:08:10,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-13 07:08:10,407 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-10-13 07:08:10,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:10,407 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-13 07:08:10,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 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 07:08:10,408 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-13 07:08:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:08:10,412 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:10,412 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:10,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:10,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-13 07:08:10,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:11,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:11,053 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:11,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:11,053 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 2 times [2021-10-13 07:08:11,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:11,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599840391] [2021-10-13 07:08:11,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:11,054 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:11,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:11,057 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:11,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:08:11,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:11,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:11,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:11,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:11,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:15,566 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:15,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:15,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599840391] [2021-10-13 07:08:15,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599840391] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:15,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1121274711] [2021-10-13 07:08:15,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:15,567 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:15,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:15,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:15,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:08:15,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:15,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:15,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:15,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:15,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:16,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1121274711] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:16,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224981594] [2021-10-13 07:08:16,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:08:16,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:16,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:16,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:08:16,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:08:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:16,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:08:16,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:16,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:08:16,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224981594] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:16,671 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:08:16,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 10, 10] total 18 [2021-10-13 07:08:16,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129153435] [2021-10-13 07:08:16,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 07:08:16,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:08:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 07:08:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:08:16,674 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 07:08:57,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:08:57,545 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-10-13 07:08:57,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 07:08:57,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 12 [2021-10-13 07:08:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:08:57,547 INFO L225 Difference]: With dead ends: 39 [2021-10-13 07:08:57,547 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:08:57,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 41754.4ms TimeCoverageRelationStatistics Valid=295, Invalid=696, Unknown=1, NotChecked=0, Total=992 [2021-10-13 07:08:57,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:08:57,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-13 07:08:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 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 07:08:57,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-13 07:08:57,555 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 12 [2021-10-13 07:08:57,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:08:57,555 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-13 07:08:57,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 07:08:57,556 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-13 07:08:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 07:08:57,557 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:08:57,557 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2021-10-13 07:08:57,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:57,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 07:08:57,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:08:58,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:58,170 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:08:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:08:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 2078182539, now seen corresponding path program 3 times [2021-10-13 07:08:58,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:08:58,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1739512119] [2021-10-13 07:08:58,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:08:58,172 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:08:58,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:08:58,173 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:08:58,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:08:58,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 07:08:58,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:58,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:08:58,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:08:58,848 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:08:58,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1739512119] [2021-10-13 07:08:58,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1739512119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:58,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1497027260] [2021-10-13 07:08:58,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:08:58,849 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:08:58,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:08:58,855 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:08:58,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:08:59,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 07:08:59,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:08:59,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:08:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:08:59,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:08:59,279 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 56 proven. 21 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-10-13 07:08:59,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1497027260] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:08:59,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837598235] [2021-10-13 07:08:59,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:08:59,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:08:59,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:08:59,288 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:08:59,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:08:59,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-10-13 07:08:59,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:08:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:08:59,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:09:00,535 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:09:00,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:09:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:09:28,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837598235] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:09:28,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:09:28,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 18, 18] total 48 [2021-10-13 07:09:28,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405203064] [2021-10-13 07:09:28,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 07:09:28,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:09:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 07:09:28,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1909, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 07:09:28,554 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 07:09:29,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:09:29,265 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-13 07:09:29,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 07:09:29,265 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 20 [2021-10-13 07:09:29,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:09:29,266 INFO L225 Difference]: With dead ends: 21 [2021-10-13 07:09:29,266 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:09:29,268 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 28735.7ms TimeCoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 07:09:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:09:29,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:09:29,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:09:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:09:29,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2021-10-13 07:09:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:09:29,269 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:09:29,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 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 07:09:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:09:29,270 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:09:29,273 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:09:29,298 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 07:09:29,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-13 07:09:29,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:09:29,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:09:29,891 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:09:29,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:09:29,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:09:30,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:09:30,766 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 07:09:30,766 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:09:30,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:09:30,766 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:09:30,767 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-13 07:09:30,767 INFO L853 garLoopResultBuilder]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (and (= (_ bv8 32) ULTIMATE.start_main_~y~0) (= (_ bv3 32) ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv1 32)) (= (_ bv2 32) ULTIMATE.start_main_~y~0)) (and (= ULTIMATE.start_main_~x~0 (_ bv0 32)) (= ULTIMATE.start_main_~y~0 (_ bv1 32))) (and (= (_ bv6 32) ULTIMATE.start_main_~x~0) (= ULTIMATE.start_main_~y~0 (_ bv64 32))) (and (= (_ bv2 32) ULTIMATE.start_main_~x~0) (= (_ bv4 32) ULTIMATE.start_main_~y~0)) (and (= ULTIMATE.start_main_~y~0 (_ bv32 32)) (= ULTIMATE.start_main_~x~0 (_ bv5 32))) (and (= (_ bv4 32) ULTIMATE.start_main_~x~0) (= (_ bv16 32) ULTIMATE.start_main_~y~0))) [2021-10-13 07:09:30,767 INFO L857 garLoopResultBuilder]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2021-10-13 07:09:30,767 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:09:30,767 INFO L860 garLoopResultBuilder]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2021-10-13 07:09:30,772 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:09:30,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:09:30 BoogieIcfgContainer [2021-10-13 07:09:30,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:09:30,797 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:09:30,797 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:09:30,797 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:09:30,798 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:08:03" (3/4) ... [2021-10-13 07:09:30,804 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:09:30,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-13 07:09:30,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:09:30,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:09:30,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:09:30,867 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:09:30,869 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:09:30,871 INFO L168 Benchmark]: Toolchain (without parser) took 88158.85 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 49.5 MB in the beginning and 61.1 MB in the end (delta: -11.5 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,872 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory is still 50.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:09:30,873 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.47 ms. Allocated memory is still 69.2 MB. Free memory was 49.2 MB in the beginning and 39.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,873 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.98 ms. Allocated memory is still 69.2 MB. Free memory was 39.6 MB in the beginning and 53.5 MB in the end (delta: -13.8 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,874 INFO L168 Benchmark]: Boogie Preprocessor took 49.60 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 52.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,874 INFO L168 Benchmark]: RCFGBuilder took 360.16 ms. Allocated memory is still 69.2 MB. Free memory was 52.2 MB in the beginning and 43.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,875 INFO L168 Benchmark]: TraceAbstraction took 87383.42 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 42.7 MB in the beginning and 63.1 MB in the end (delta: -20.5 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,878 INFO L168 Benchmark]: Witness Printer took 72.57 ms. Allocated memory is still 88.1 MB. Free memory was 63.1 MB in the beginning and 61.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:09:30,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory is still 50.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 241.47 ms. Allocated memory is still 69.2 MB. Free memory was 49.2 MB in the beginning and 39.6 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.98 ms. Allocated memory is still 69.2 MB. Free memory was 39.6 MB in the beginning and 53.5 MB in the end (delta: -13.8 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.60 ms. Allocated memory is still 69.2 MB. Free memory was 53.5 MB in the beginning and 52.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 360.16 ms. Allocated memory is still 69.2 MB. Free memory was 52.2 MB in the beginning and 43.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 87383.42 ms. Allocated memory was 69.2 MB in the beginning and 88.1 MB in the end (delta: 18.9 MB). Free memory was 42.7 MB in the beginning and 63.1 MB in the end (delta: -20.5 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. * Witness Printer took 72.57 ms. Allocated memory is still 88.1 MB. Free memory was 63.1 MB in the beginning and 61.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 87285.5ms, OverallIterations: 4, TraceHistogramMax: 14, EmptinessCheckTime: 20.7ms, AutomataDifference: 45565.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 875.9ms, InitialAbstractionConstructionTime: 10.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22 SDtfs, 63 SDslu, 132 SDs, 0 SdLazy, 306 SolverSat, 50 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3926.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 259 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 75137.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.0ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 51 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 130.8ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 64 FormulaSimplificationTreeSizeReductionInter, 738.7ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 94.5ms SsaConstructionTime, 666.1ms SatisfiabilityAnalysisTime, 37091.8ms InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 232 ConstructedInterpolants, 0 QuantifiedInterpolants, 763 SizeOfPredicates, 13 NumberOfNonLiveVariables, 478 ConjunctsInSsa, 80 ConjunctsInUnsatCore, 20 InterpolantComputations, 2 PerfectInterpolantSequences, 336/774 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((((((8bv32 == y && 3bv32 == x) || (x == 1bv32 && 2bv32 == y)) || (x == 0bv32 && y == 1bv32)) || (6bv32 == x && y == 64bv32)) || (2bv32 == x && 4bv32 == y)) || (y == 32bv32 && x == 5bv32)) || (4bv32 == x && 16bv32 == y) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:09:30,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_94801b9f-22df-44d3-8c5c-4d9a0af8a263/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...