./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/num_conversion_1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI --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 22f8891fc10bb8c305de18eb9540699e7b8a01ce ............................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/num_conversion_1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI --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 22f8891fc10bb8c305de18eb9540699e7b8a01ce .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:37,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:37,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:37,303 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:37,304 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:37,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:37,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:37,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:37,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:37,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:37,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:37,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:37,317 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:37,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:37,320 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:37,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:37,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:37,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:37,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:37,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:37,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:37,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:37,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:37,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:37,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:37,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:37,341 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:37,342 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:37,343 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:37,344 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:37,345 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:37,346 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:37,347 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:37,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:37,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:37,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:37,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:37,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:37,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:37,353 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:37,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:37,356 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:37,379 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:37,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:37,381 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:37,381 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:37,381 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:37,382 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:37,382 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:37,382 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:37,382 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:37,383 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:37,383 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:37,383 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:37,383 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:37,384 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:37,384 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:37,385 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:37,385 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:37,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:37,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:37,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:37,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:37,386 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:37,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:37,387 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:37,387 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:37,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:37,387 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:37,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:37,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:37,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:37,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:37,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:37,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:37,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:37,389 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:37,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:37,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:37,390 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:37,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:37,391 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2021-10-11 02:23:37,635 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:37,666 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:37,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:37,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:37,673 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:37,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 02:23:37,751 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/b5bda0cbc/765c0c80e1a446b1a52963803288bfd2/FLAG10da75608 [2021-10-11 02:23:38,255 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:38,256 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 02:23:38,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/b5bda0cbc/765c0c80e1a446b1a52963803288bfd2/FLAG10da75608 [2021-10-11 02:23:38,652 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/b5bda0cbc/765c0c80e1a446b1a52963803288bfd2 [2021-10-11 02:23:38,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:38,657 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:38,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:38,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:38,663 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:38,664 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71b13121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38, skipping insertion in model container [2021-10-11 02:23:38,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:38,687 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:38,807 WARN L226 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 02:23:38,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:38,874 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:38,889 WARN L226 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 02:23:38,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:38,904 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:38,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38 WrapperNode [2021-10-11 02:23:38,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:38,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:38,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:38,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:38,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,937 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:38,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:38,938 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:38,939 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:38,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,952 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... [2021-10-11 02:23:38,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:38,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:38,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:38,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:38,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:39,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:39,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:39,272 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:39,273 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:23:39,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:39 BoogieIcfgContainer [2021-10-11 02:23:39,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:39,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:39,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:39,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:39,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:38" (1/3) ... [2021-10-11 02:23:39,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80cf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:39, skipping insertion in model container [2021-10-11 02:23:39,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:38" (2/3) ... [2021-10-11 02:23:39,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d80cf36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:39, skipping insertion in model container [2021-10-11 02:23:39,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:39" (3/3) ... [2021-10-11 02:23:39,284 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-10-11 02:23:39,299 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:39,302 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:39,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:39,339 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:39,339 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:39,339 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:39,340 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:39,340 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:39,340 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:39,340 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:39,340 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2021-10-11 02:23:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:23:39,358 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:39,359 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:23:39,360 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:39,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash 2068874, now seen corresponding path program 1 times [2021-10-11 02:23:39,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:39,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414041944] [2021-10-11 02:23:39,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:39,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414041944] [2021-10-11 02:23:39,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:39,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:39,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182224844] [2021-10-11 02:23:39,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:39,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:39,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:39,573 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2021-10-11 02:23:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:39,596 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2021-10-11 02:23:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:39,598 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:23:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:39,619 INFO L225 Difference]: With dead ends: 13 [2021-10-11 02:23:39,620 INFO L226 Difference]: Without dead ends: 6 [2021-10-11 02:23:39,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-11 02:23:39,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-11 02:23:39,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 02:23:39,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-11 02:23:39,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-11 02:23:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:39,664 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-11 02:23:39,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-11 02:23:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:39,665 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:39,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:23:39,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:39,668 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash 64093736, now seen corresponding path program 1 times [2021-10-11 02:23:39,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:39,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251569802] [2021-10-11 02:23:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251569802] [2021-10-11 02:23:39,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137029430] [2021-10-11 02:23:39,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:39,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:23:39,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:39,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:39,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:39,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [961479550] [2021-10-11 02:23:40,022 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:23:40,022 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:40,027 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:40,033 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:40,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:40,453 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:40,610 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:23:40,848 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-10-11 02:23:40,850 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:40,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:40,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2021-10-11 02:23:40,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436327494] [2021-10-11 02:23:40,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:40,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:40,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:40,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:40,855 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2021-10-11 02:23:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:40,900 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2021-10-11 02:23:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:40,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2021-10-11 02:23:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:40,901 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:23:40,901 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:23:40,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:23:40,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:23:40,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:23:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:23:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 02:23:40,906 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-10-11 02:23:40,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:40,906 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 02:23:40,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:40,907 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 02:23:40,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:23:40,907 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:40,907 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2021-10-11 02:23:41,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:23:41,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:41,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:41,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1885026038, now seen corresponding path program 2 times [2021-10-11 02:23:41,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:41,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689576197] [2021-10-11 02:23:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:41,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689576197] [2021-10-11 02:23:41,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796366227] [2021-10-11 02:23:41,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:41,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:23:41,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 02:23:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:41,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:41,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:43,009 WARN L197 SmtUtils]: Spent 917.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 47 [2021-10-11 02:23:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:43,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946631147] [2021-10-11 02:23:43,028 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:23:43,028 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:43,028 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:43,029 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:43,029 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:43,224 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:43,391 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 40 [2021-10-11 02:23:43,717 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2021-10-11 02:23:43,718 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:43,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:43,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-10-11 02:23:43,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702804212] [2021-10-11 02:23:43,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-10-11 02:23:43,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 02:23:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-10-11 02:23:43,723 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 16 states. [2021-10-11 02:23:45,618 WARN L197 SmtUtils]: Spent 579.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-10-11 02:23:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:45,620 INFO L93 Difference]: Finished difference Result 16 states and 19 transitions. [2021-10-11 02:23:45,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:23:45,620 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 8 [2021-10-11 02:23:45,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:45,621 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:23:45,621 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 02:23:45,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:23:45,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 02:23:45,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 02:23:45,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 02:23:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-11 02:23:45,625 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 8 [2021-10-11 02:23:45,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:45,626 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-11 02:23:45,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-10-11 02:23:45,626 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-11 02:23:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:23:45,627 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:45,627 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2021-10-11 02:23:45,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:45,843 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:45,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:45,844 INFO L82 PathProgramCache]: Analyzing trace with hash -490585974, now seen corresponding path program 3 times [2021-10-11 02:23:45,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:45,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782167741] [2021-10-11 02:23:45,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:45,907 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:45,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:45,998 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:45,998 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:45,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-10-11 02:23:46,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:46 BoogieIcfgContainer [2021-10-11 02:23:46,038 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:46,039 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:46,039 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:46,039 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:46,040 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:39" (3/4) ... [2021-10-11 02:23:46,044 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-11 02:23:46,044 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:46,046 INFO L168 Benchmark]: Toolchain (without parser) took 7387.43 ms. Allocated memory was 111.1 MB in the beginning and 184.5 MB in the end (delta: 73.4 MB). Free memory was 81.9 MB in the beginning and 102.4 MB in the end (delta: -20.6 MB). Peak memory consumption was 52.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:46,046 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory is still 66.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:46,047 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.09 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 81.9 MB in the beginning and 129.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:46,048 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 153.1 MB. Free memory was 129.6 MB in the beginning and 128.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:46,048 INFO L168 Benchmark]: Boogie Preprocessor took 21.36 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 126.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:46,049 INFO L168 Benchmark]: RCFGBuilder took 315.07 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 111.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:46,050 INFO L168 Benchmark]: TraceAbstraction took 6761.50 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 111.2 MB in the beginning and 102.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:46,051 INFO L168 Benchmark]: Witness Printer took 5.27 ms. Allocated memory is still 184.5 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:46,054 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 111.1 MB. Free memory is still 66.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 246.09 ms. Allocated memory was 111.1 MB in the beginning and 153.1 MB in the end (delta: 41.9 MB). Free memory was 81.9 MB in the beginning and 129.6 MB in the end (delta: -47.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.34 ms. Allocated memory is still 153.1 MB. Free memory was 129.6 MB in the beginning and 128.0 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.36 ms. Allocated memory is still 153.1 MB. Free memory was 128.0 MB in the beginning and 126.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 315.07 ms. Allocated memory is still 153.1 MB. Free memory was 126.9 MB in the beginning and 111.7 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6761.50 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 111.2 MB in the beginning and 102.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.27 ms. Allocated memory is still 184.5 MB. Free memory is still 102.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 24, overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L16] unsigned char x; [L17] unsigned char y; [L18] unsigned char c; [L20] x = 37 [L21] y = 0 [L22] c = 0 [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND FALSE !(bit != (unsigned char)0) [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND TRUE c < (unsigned char)8 [L24] unsigned char i = ((unsigned char)1) << c; [L25] unsigned char bit = x & i; [L26] COND TRUE bit != (unsigned char)0 [L27] y = y + i [L29] c = c + ((unsigned char)1) [L23] COND FALSE !(c < (unsigned char)8) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 4, TraceHistogramMax: 8, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 4 SDslu, 28 SDs, 0 SdLazy, 53 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 2029 SizeOfPredicates, 2 NumberOfNonLiveVariables, 110 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:48,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:48,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:48,686 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:48,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:48,692 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:48,695 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:48,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:48,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:48,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:48,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:48,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:48,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:48,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:48,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:48,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:48,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:48,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:48,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:48,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:48,733 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:48,735 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:48,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:48,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:48,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:48,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:48,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:48,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:48,754 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:48,755 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:48,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:48,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:48,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:48,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:48,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:48,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:48,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:48,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:48,762 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:48,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:48,764 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:48,765 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-11 02:23:48,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:48,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:48,807 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:48,807 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:48,808 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:48,808 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:48,808 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:48,808 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:48,808 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:48,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:48,811 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:48,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:48,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:48,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:48,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:48,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:48,812 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:48,812 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-11 02:23:48,813 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-11 02:23:48,813 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:48,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:48,813 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:48,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:48,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:48,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 02:23:48,814 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:48,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:48,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:48,815 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:48,815 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:48,815 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-11 02:23:48,815 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-11 02:23:48,815 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:48,816 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:48,816 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:48,816 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22f8891fc10bb8c305de18eb9540699e7b8a01ce [2021-10-11 02:23:49,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:49,248 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:49,250 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:49,251 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:49,252 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:49,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 02:23:49,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/aaa9faf3c/8ea840c1ca334c00a9cf61e0823bbe0c/FLAG4163b9747 [2021-10-11 02:23:49,851 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:49,851 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c [2021-10-11 02:23:49,858 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/aaa9faf3c/8ea840c1ca334c00a9cf61e0823bbe0c/FLAG4163b9747 [2021-10-11 02:23:50,175 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/data/aaa9faf3c/8ea840c1ca334c00a9cf61e0823bbe0c [2021-10-11 02:23:50,178 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:50,179 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:50,181 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:50,181 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:50,185 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:50,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49eabf27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50, skipping insertion in model container [2021-10-11 02:23:50,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,196 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:50,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:50,344 WARN L226 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 02:23:50,357 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:50,370 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:50,383 WARN L226 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_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/sv-benchmarks/c/bitvector/num_conversion_1.c[368,381] [2021-10-11 02:23:50,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:50,403 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:50,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50 WrapperNode [2021-10-11 02:23:50,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:50,405 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:50,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:50,406 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:50,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:50,441 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:50,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:50,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:50,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... [2021-10-11 02:23:50,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:50,466 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:50,466 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:50,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:50,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:50,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:50,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-11 02:23:50,563 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:50,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:50,914 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:23:50,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:50 BoogieIcfgContainer [2021-10-11 02:23:50,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:50,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:50,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:50,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:50,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:50" (1/3) ... [2021-10-11 02:23:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2518f97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:50, skipping insertion in model container [2021-10-11 02:23:50,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:50" (2/3) ... [2021-10-11 02:23:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2518f97f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:50, skipping insertion in model container [2021-10-11 02:23:50,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:50" (3/3) ... [2021-10-11 02:23:50,927 INFO L111 eAbstractionObserver]: Analyzing ICFG num_conversion_1.c [2021-10-11 02:23:50,946 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:50,949 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:50,960 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:50,997 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:50,997 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:50,997 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:50,998 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:50,998 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:50,998 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:50,998 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:50,998 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 02:23:51,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:23:51,015 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:23:51,016 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:51,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:51,022 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-11 02:23:51,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:51,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2084204497] [2021-10-11 02:23:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-11 02:23:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:51,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:51,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:51,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2084204497] [2021-10-11 02:23:51,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:51,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:51,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819102193] [2021-10-11 02:23:51,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:23:51,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:23:51,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:51,196 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 02:23:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:51,211 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:23:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:23:51,213 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 02:23:51,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:51,221 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:23:51,222 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:23:51,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:23:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:23:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:23:51,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:23:51,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:23:51,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-11 02:23:51,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:51,257 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:23:51,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:23:51,257 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:23:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:23:51,258 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:23:51,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2021-10-11 02:23:51,473 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:51,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-10-11 02:23:51,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:51,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [310115831] [2021-10-11 02:23:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:51,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:23:51,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:51,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:51,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [310115831] [2021-10-11 02:23:51,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:51,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:51,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409778364] [2021-10-11 02:23:51,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:51,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:51,575 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-10-11 02:23:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:51,593 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 02:23:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:51,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:23:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:51,594 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:23:51,595 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:23:51,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:23:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-10-11 02:23:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:23:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:23:51,599 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-10-11 02:23:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:51,600 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:23:51,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:51,600 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:23:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:23:51,601 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:51,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2021-10-11 02:23:51,812 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:51,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:51,813 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-10-11 02:23:51,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:51,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052916850] [2021-10-11 02:23:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:51,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:23:51,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:51,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-10-11 02:23:51,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052916850] [2021-10-11 02:23:51,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:51,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:51,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062145043] [2021-10-11 02:23:51,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:51,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:51,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:51,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:51,941 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 4 states. [2021-10-11 02:23:51,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:51,990 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-10-11 02:23:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:23:51,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2021-10-11 02:23:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:51,992 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:23:51,992 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:23:51,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:23:51,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:23:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 11. [2021-10-11 02:23:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:23:51,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:23:51,997 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:23:51,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:51,997 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:23:51,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:51,997 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:23:51,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:23:51,998 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:52,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2021-10-11 02:23:52,216 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:52,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:52,216 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-10-11 02:23:52,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:52,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [236663842] [2021-10-11 02:23:52,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:52,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:52,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [236663842] [2021-10-11 02:23:52,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1586472283] [2021-10-11 02:23:52,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:23:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:52,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:23:52,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49320047] [2021-10-11 02:23:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:52,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:23:52,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:52,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-11 02:23:52,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 5] total 7 [2021-10-11 02:23:52,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327172767] [2021-10-11 02:23:52,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 02:23:52,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 02:23:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:23:52,645 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2021-10-11 02:23:52,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:52,729 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-10-11 02:23:52,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:23:52,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-10-11 02:23:52,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:52,733 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:23:52,733 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:23:52,733 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:23:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:23:52,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:23:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-11 02:23:52,738 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 9 [2021-10-11 02:23:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:52,738 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-11 02:23:52,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 02:23:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-11 02:23:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:23:52,739 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:52,739 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:53,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3,6 cvc4 --incremental --print-success --lang smt,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:53,343 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1843204080, now seen corresponding path program 1 times [2021-10-11 02:23:53,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:53,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495270811] [2021-10-11 02:23:53,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:53,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:23:53,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:53,553 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:23:53,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:23:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495270811] [2021-10-11 02:23:53,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645630938] [2021-10-11 02:23:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:23:53,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:23:53,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:23:53,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-11 02:23:53,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153441754] [2021-10-11 02:23:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:53,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:23:53,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:54,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:54,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:54,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-11 02:23:54,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 9, 10] total 23 [2021-10-11 02:23:54,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719216477] [2021-10-11 02:23:54,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-10-11 02:23:54,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:23:54,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-11 02:23:54,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:23:54,659 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 23 states. [2021-10-11 02:23:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:55,960 INFO L93 Difference]: Finished difference Result 64 states and 85 transitions. [2021-10-11 02:23:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-11 02:23:55,962 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 18 [2021-10-11 02:23:55,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:55,964 INFO L225 Difference]: With dead ends: 64 [2021-10-11 02:23:55,964 INFO L226 Difference]: Without dead ends: 52 [2021-10-11 02:23:55,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2021-10-11 02:23:55,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-11 02:23:55,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2021-10-11 02:23:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-10-11 02:23:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-10-11 02:23:55,978 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 18 [2021-10-11 02:23:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:55,979 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-10-11 02:23:55,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-10-11 02:23:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-10-11 02:23:55,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:23:55,981 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:55,981 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:56,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:56,587 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:56,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:56,587 INFO L82 PathProgramCache]: Analyzing trace with hash -29656432, now seen corresponding path program 2 times [2021-10-11 02:23:56,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:23:56,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014970891] [2021-10-11 02:23:56,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2021-10-11 02:23:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:23:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:23:56,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:23:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014970891] [2021-10-11 02:23:57,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1705499390] [2021-10-11 02:23:57,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:23:57,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 02:23:57,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:57,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 02:23:57,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:57,868 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:23:57,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-11 02:23:57,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391782720] [2021-10-11 02:23:57,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:57,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 02:23:57,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-11 02:23:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:58,377 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:58,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:00,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-11 02:24:00,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15, 15, 19, 20] total 49 [2021-10-11 02:24:00,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555165771] [2021-10-11 02:24:00,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-10-11 02:24:00,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:00,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-11 02:24:00,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1939, Unknown=0, NotChecked=0, Total=2352 [2021-10-11 02:24:00,519 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand 49 states. [2021-10-11 02:24:01,457 WARN L197 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 108 [2021-10-11 02:24:02,038 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-10-11 02:24:02,695 WARN L197 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 114 [2021-10-11 02:24:03,310 WARN L197 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 114 [2021-10-11 02:24:03,899 WARN L197 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 99 [2021-10-11 02:24:04,675 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-10-11 02:24:05,681 WARN L197 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 123 [2021-10-11 02:24:06,167 WARN L197 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-10-11 02:24:06,521 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-10-11 02:24:07,161 WARN L197 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 124 [2021-10-11 02:24:07,607 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2021-10-11 02:24:08,341 WARN L197 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 125 [2021-10-11 02:24:08,943 WARN L197 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-10-11 02:24:09,191 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-10-11 02:24:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:11,143 INFO L93 Difference]: Finished difference Result 118 states and 151 transitions. [2021-10-11 02:24:11,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-11 02:24:11,144 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 30 [2021-10-11 02:24:11,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:11,146 INFO L225 Difference]: With dead ends: 118 [2021-10-11 02:24:11,146 INFO L226 Difference]: Without dead ends: 102 [2021-10-11 02:24:11,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 120 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1566, Invalid=6090, Unknown=0, NotChecked=0, Total=7656 [2021-10-11 02:24:11,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-11 02:24:11,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2021-10-11 02:24:11,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2021-10-11 02:24:11,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 118 transitions. [2021-10-11 02:24:11,167 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 118 transitions. Word has length 30 [2021-10-11 02:24:11,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:11,168 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 118 transitions. [2021-10-11 02:24:11,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2021-10-11 02:24:11,168 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 118 transitions. [2021-10-11 02:24:11,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:24:11,170 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:11,170 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:11,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 mathsat -unsat_core_generation=3,12 cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:11,795 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:11,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:11,796 INFO L82 PathProgramCache]: Analyzing trace with hash -86914734, now seen corresponding path program 3 times [2021-10-11 02:24:11,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-11 02:24:11,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1865207278] [2021-10-11 02:24:11,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2021-10-11 02:24:11,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:24:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:11,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:24:12,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1865207278] [2021-10-11 02:24:12,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [88924590] [2021-10-11 02:24:12,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:12,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:24:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:12,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:24:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-11 02:24:12,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:12,963 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-11 02:24:12,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057134244] [2021-10-11 02:24:12,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:24:13,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:24:13,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:24:13,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:24:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:13,118 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-11 02:24:13,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-10-11 02:24:13,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-11 02:24:13,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 6, 6] total 27 [2021-10-11 02:24:13,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672224316] [2021-10-11 02:24:13,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-10-11 02:24:13,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-11 02:24:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-11 02:24:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=541, Unknown=0, NotChecked=0, Total=702 [2021-10-11 02:24:13,245 INFO L87 Difference]: Start difference. First operand 91 states and 118 transitions. Second operand 27 states. [2021-10-11 02:24:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:13,627 INFO L93 Difference]: Finished difference Result 91 states and 118 transitions. [2021-10-11 02:24:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-11 02:24:13,636 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2021-10-11 02:24:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:13,636 INFO L225 Difference]: With dead ends: 91 [2021-10-11 02:24:13,636 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:24:13,637 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=330, Invalid=1002, Unknown=0, NotChecked=0, Total=1332 [2021-10-11 02:24:13,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:24:13,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:24:13,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:24:13,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:24:13,638 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2021-10-11 02:24:13,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:13,638 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:24:13,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-10-11 02:24:13,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:24:13,639 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:24:14,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 mathsat -unsat_core_generation=3,15 cvc4 --incremental --print-success --lang smt [2021-10-11 02:24:14,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:24:14,733 WARN L197 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 46 [2021-10-11 02:24:14,736 INFO L265 CegarLoopResult]: At program point L33(lines 14 34) the Hoare annotation is: true [2021-10-11 02:24:14,737 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:24:14,737 INFO L258 CegarLoopResult]: At program point L23-2(lines 23 30) the Hoare annotation is: (let ((.cse0 (= (_ bv37 8) ULTIMATE.start_main_~y~0)) (.cse2 (not (= (_ bv0 32) ((_ zero_extend 24) ULTIMATE.start_main_~bit~0)))) (.cse4 (= (_ bv5 8) ULTIMATE.start_main_~y~0)) (.cse5 (= ULTIMATE.start_main_~bit~0 (_ bv0 8))) (.cse3 (= (_ bv1 8) ULTIMATE.start_main_~y~0)) (.cse1 (= (_ bv37 8) ULTIMATE.start_main_~x~0))) (or (and .cse0 .cse1 (= (_ bv8 8) ULTIMATE.start_main_~c~0)) (and .cse2 (= (_ bv1 8) ULTIMATE.start_main_~c~0) .cse1 .cse3) (and .cse4 .cse5 .cse1 (= (_ bv5 8) ULTIMATE.start_main_~c~0)) (and .cse0 (= (_ bv7 8) ULTIMATE.start_main_~c~0) .cse5 .cse1) (and .cse0 .cse2 (= (_ bv6 8) ULTIMATE.start_main_~c~0) .cse1) (and .cse4 (= (_ bv3 8) ULTIMATE.start_main_~c~0) (= (_ bv0 8) (bvadd ULTIMATE.start_main_~bit~0 (_ bv252 8))) .cse1) (and .cse4 .cse5 (= (_ bv4 8) ULTIMATE.start_main_~c~0) .cse1) (and (= (_ bv2 8) ULTIMATE.start_main_~c~0) .cse5 .cse1 .cse3) (and (= (_ bv0 8) ULTIMATE.start_main_~c~0) .cse1 (= (_ bv0 8) ULTIMATE.start_main_~y~0)))) [2021-10-11 02:24:14,737 INFO L262 CegarLoopResult]: For program point L23-3(lines 23 30) no Hoare annotation was computed. [2021-10-11 02:24:14,737 INFO L262 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-11 02:24:14,737 INFO L265 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point L26(lines 26 28) no Hoare annotation was computed. [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2021-10-11 02:24:14,738 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-11 02:24:14,743 INFO L262 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-11 02:24:14,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:14 BoogieIcfgContainer [2021-10-11 02:24:14,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:14,777 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:14,778 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:14,778 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:14,778 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:50" (3/4) ... [2021-10-11 02:24:14,781 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:24:14,792 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 02:24:14,792 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:24:14,792 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:24:14,792 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:24:14,832 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_064d2ac2-bc0e-4cc8-9e23-e3dee489046e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:24:14,833 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:14,835 INFO L168 Benchmark]: Toolchain (without parser) took 24653.87 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 38.3 MB in the beginning and 48.0 MB in the end (delta: -9.8 MB). Peak memory consumption was 38.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,839 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:14,839 INFO L168 Benchmark]: CACSL2BoogieTranslator took 223.68 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 28.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,840 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.84 ms. Allocated memory is still 58.7 MB. Free memory was 28.2 MB in the beginning and 26.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,840 INFO L168 Benchmark]: Boogie Preprocessor took 24.51 ms. Allocated memory is still 58.7 MB. Free memory was 26.7 MB in the beginning and 25.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:14,840 INFO L168 Benchmark]: RCFGBuilder took 449.77 ms. Allocated memory is still 58.7 MB. Free memory was 25.6 MB in the beginning and 32.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,841 INFO L168 Benchmark]: TraceAbstraction took 23859.60 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 32.4 MB in the beginning and 51.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,841 INFO L168 Benchmark]: Witness Printer took 55.27 ms. Allocated memory is still 104.9 MB. Free memory was 51.2 MB in the beginning and 48.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:14,843 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 58.7 MB. Free memory is still 39.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 223.68 ms. Allocated memory is still 58.7 MB. Free memory was 38.0 MB in the beginning and 28.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.84 ms. Allocated memory is still 58.7 MB. Free memory was 28.2 MB in the beginning and 26.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.51 ms. Allocated memory is still 58.7 MB. Free memory was 26.7 MB in the beginning and 25.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 449.77 ms. Allocated memory is still 58.7 MB. Free memory was 25.6 MB in the beginning and 32.8 MB in the end (delta: -7.2 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 23859.60 ms. Allocated memory was 58.7 MB in the beginning and 104.9 MB in the end (delta: 46.1 MB). Free memory was 32.4 MB in the beginning and 51.2 MB in the end (delta: -18.8 MB). Peak memory consumption was 57.7 MB. Max. memory is 16.1 GB. * Witness Printer took 55.27 ms. Allocated memory is still 104.9 MB. Free memory was 51.2 MB in the beginning and 48.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (((((((((37bv8 == y && 37bv8 == x) && 8bv8 == c) || (((!(0bv32 == ~zero_extendFrom8To32(bit)) && 1bv8 == c) && 37bv8 == x) && 1bv8 == y)) || (((5bv8 == y && bit == 0bv8) && 37bv8 == x) && 5bv8 == c)) || (((37bv8 == y && 7bv8 == c) && bit == 0bv8) && 37bv8 == x)) || (((37bv8 == y && !(0bv32 == ~zero_extendFrom8To32(bit))) && 6bv8 == c) && 37bv8 == x)) || (((5bv8 == y && 3bv8 == c) && 0bv8 == ~bvadd64(bit, 252bv8)) && 37bv8 == x)) || (((5bv8 == y && bit == 0bv8) && 4bv8 == c) && 37bv8 == x)) || (((2bv8 == c && bit == 0bv8) && 37bv8 == x) && 1bv8 == y)) || ((0bv8 == c && 37bv8 == x) && 0bv8 == y) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.2s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 60 SDtfs, 391 SDslu, 299 SDs, 0 SdLazy, 1112 SolverSat, 335 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 404 SyntacticMatches, 11 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2198 ImplicationChecksByTransitivity, 15.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 34 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 14 NumberOfFragments, 120 HoareAnnotationTreeSize, 3 FomulaSimplifications, 142 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 234 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 282 NumberOfCodeBlocks, 246 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 516 ConstructedInterpolants, 46 QuantifiedInterpolants, 198933 SizeOfPredicates, 56 NumberOfNonLiveVariables, 718 ConjunctsInSsa, 132 ConjunctsInUnsatCore, 27 InterpolantComputations, 3 PerfectInterpolantSequences, 399/1243 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...