./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE --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 4d1375e0884273e701688a9a8eac55476ef970fe83c7d545ad9af0603bce9da2 .............................................................................................................................................................................................................................................................................................................................. 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_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE --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 4d1375e0884273e701688a9a8eac55476ef970fe83c7d545ad9af0603bce9da2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:16:14,241 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:16:14,243 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:16:14,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:16:14,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:16:14,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:16:14,287 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:16:14,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:16:14,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:16:14,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:16:14,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:16:14,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:16:14,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:16:14,310 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:16:14,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:16:14,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:16:14,319 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:16:14,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:16:14,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:16:14,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:16:14,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:16:14,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:16:14,335 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:16:14,336 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:16:14,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:16:14,340 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:16:14,340 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:16:14,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:16:14,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:16:14,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:16:14,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:16:14,348 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:16:14,349 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:16:14,349 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:16:14,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:16:14,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:16:14,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:16:14,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:16:14,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:16:14,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:16:14,354 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:16:14,355 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 11:16:14,384 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:16:14,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:16:14,385 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:16:14,385 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:16:14,386 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:16:14,386 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:16:14,386 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 11:16:14,386 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:16:14,386 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:16:14,387 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 11:16:14,387 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 11:16:14,387 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:16:14,387 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 11:16:14,387 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 11:16:14,387 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 11:16:14,388 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:16:14,388 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:16:14,389 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:16:14,390 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:16:14,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:16:14,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:16:14,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:16:14,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:16:14,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:16:14,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:16:14,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:14,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:16:14,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:16:14,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:16:14,393 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_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1375e0884273e701688a9a8eac55476ef970fe83c7d545ad9af0603bce9da2 [2021-10-24 11:16:14,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:16:14,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:16:14,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:16:14,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:16:14,692 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:16:14,693 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c [2021-10-24 11:16:14,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/d68a2c22e/a2b2c2acab634a888b91ba0a7710f90f/FLAG68f1e5cea [2021-10-24 11:16:15,296 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:16:15,301 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c [2021-10-24 11:16:15,307 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/d68a2c22e/a2b2c2acab634a888b91ba0a7710f90f/FLAG68f1e5cea [2021-10-24 11:16:15,646 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/d68a2c22e/a2b2c2acab634a888b91ba0a7710f90f [2021-10-24 11:16:15,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:16:15,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:16:15,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:15,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:16:15,657 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:16:15,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:15,664 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@553e8a43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15, skipping insertion in model container [2021-10-24 11:16:15,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:15,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:16:15,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:16:15,850 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c[709,722] [2021-10-24 11:16:15,871 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:15,879 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:16:15,889 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c[709,722] [2021-10-24 11:16:15,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:15,912 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:16:15,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15 WrapperNode [2021-10-24 11:16:15,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:15,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:15,914 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:16:15,914 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:16:15,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:15,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:15,987 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:15,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:16:15,990 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:16:15,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:16:16,000 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:16:16,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:16:16,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:16:16,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:16:16,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (1/1) ... [2021-10-24 11:16:16,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:16,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:16:16,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:16:16,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:16:16,146 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 11:16:16,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:16:16,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:16:16,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:16:16,444 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:16:16,445 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-24 11:16:16,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:16 BoogieIcfgContainer [2021-10-24 11:16:16,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:16:16,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:16:16,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:16:16,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:16:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:16:15" (1/3) ... [2021-10-24 11:16:16,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25287e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:16, skipping insertion in model container [2021-10-24 11:16:16,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:15" (2/3) ... [2021-10-24 11:16:16,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25287e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:16, skipping insertion in model container [2021-10-24 11:16:16,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:16" (3/3) ... [2021-10-24 11:16:16,463 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound100.c [2021-10-24 11:16:16,468 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:16:16,468 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-24 11:16:16,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:16:16,526 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:16:16,527 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-24 11:16:16,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 11:16:16,547 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:16,548 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 11:16:16,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:16:16,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:16,555 INFO L82 PathProgramCache]: Analyzing trace with hash 114241630, now seen corresponding path program 1 times [2021-10-24 11:16:16,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:16,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480751686] [2021-10-24 11:16:16,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:16,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:16,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 11:16:16,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480751686] [2021-10-24 11:16:16,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480751686] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:16,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:16,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 11:16:16,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107928222] [2021-10-24 11:16:16,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:16:16,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 11:16:16,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:16:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:16,767 INFO L87 Difference]: Start difference. First operand has 29 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 28 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:16,785 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2021-10-24 11:16:16,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:16:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 11:16:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:16,795 INFO L225 Difference]: With dead ends: 57 [2021-10-24 11:16:16,795 INFO L226 Difference]: Without dead ends: 27 [2021-10-24 11:16:16,799 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:16,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-24 11:16:16,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-24 11:16:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-24 11:16:16,833 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2021-10-24 11:16:16,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:16,834 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-24 11:16:16,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-24 11:16:16,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 11:16:16,836 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:16,836 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 11:16:16,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 11:16:16,837 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:16:16,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:16,840 INFO L82 PathProgramCache]: Analyzing trace with hash 112890113, now seen corresponding path program 1 times [2021-10-24 11:16:16,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 11:16:16,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524521350] [2021-10-24 11:16:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:16,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 11:16:16,860 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-24 11:16:16,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698448243] [2021-10-24 11:16:16,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:16,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:16:16,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:16:16,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 11:16:16,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 11:16:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:16:16,922 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:16:16,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:16:16,953 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 11:16:16,953 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:16:16,955 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,957 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,958 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:16:16,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:16:17,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 11:16:17,187 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:16:17,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:16:17 BoogieIcfgContainer [2021-10-24 11:16:17,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:16:17,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:16:17,216 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:16:17,217 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:16:17,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:16" (3/4) ... [2021-10-24 11:16:17,222 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 11:16:17,222 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:16:17,227 INFO L168 Benchmark]: Toolchain (without parser) took 1574.19 ms. Allocated memory is still 130.0 MB. Free memory was 97.5 MB in the beginning and 65.5 MB in the end (delta: 32.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:17,228 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 50.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:17,229 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.65 ms. Allocated memory is still 130.0 MB. Free memory was 97.2 MB in the beginning and 103.8 MB in the end (delta: -6.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:17,236 INFO L168 Benchmark]: Boogie Procedure Inliner took 75.00 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:17,237 INFO L168 Benchmark]: Boogie Preprocessor took 59.55 ms. Allocated memory is still 130.0 MB. Free memory was 102.3 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:17,238 INFO L168 Benchmark]: RCFGBuilder took 405.57 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 90.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:17,238 INFO L168 Benchmark]: TraceAbstraction took 756.97 ms. Allocated memory is still 130.0 MB. Free memory was 89.7 MB in the beginning and 65.5 MB in the end (delta: 24.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2021-10-24 11:16:17,239 INFO L168 Benchmark]: Witness Printer took 7.37 ms. Allocated memory is still 130.0 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:16:17,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 96.5 MB. Free memory is still 50.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.65 ms. Allocated memory is still 130.0 MB. Free memory was 97.2 MB in the beginning and 103.8 MB in the end (delta: -6.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 75.00 ms. Allocated memory is still 130.0 MB. Free memory was 103.8 MB in the beginning and 102.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.55 ms. Allocated memory is still 130.0 MB. Free memory was 102.3 MB in the beginning and 101.1 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 405.57 ms. Allocated memory is still 130.0 MB. Free memory was 101.1 MB in the beginning and 90.2 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 756.97 ms. Allocated memory is still 130.0 MB. Free memory was 89.7 MB in the beginning and 65.5 MB in the end (delta: 24.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 7.37 ms. Allocated memory is still 130.0 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 34. Possible FailurePath: [L24] int counter = 0; [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<100 [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 667.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 9.9ms, AutomataDifference: 50.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 12.1ms SsaConstructionTime, 45.1ms SatisfiabilityAnalysisTime, 68.2ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 4 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 [2021-10-24 11:16:17,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 11:16:19,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 11:16:19,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 11:16:19,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 11:16:19,907 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 11:16:19,912 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 11:16:19,914 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 11:16:19,922 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 11:16:19,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 11:16:19,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 11:16:19,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 11:16:19,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 11:16:19,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 11:16:19,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 11:16:19,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 11:16:19,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 11:16:19,937 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 11:16:19,938 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 11:16:19,940 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 11:16:19,943 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 11:16:19,945 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 11:16:19,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 11:16:19,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 11:16:19,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 11:16:19,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 11:16:19,953 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 11:16:19,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 11:16:19,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 11:16:19,955 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 11:16:19,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 11:16:19,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 11:16:19,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 11:16:19,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 11:16:19,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 11:16:19,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 11:16:19,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 11:16:19,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 11:16:19,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 11:16:19,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 11:16:19,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 11:16:19,966 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 11:16:19,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-24 11:16:19,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 11:16:19,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 11:16:19,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 11:16:19,995 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 11:16:19,996 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 11:16:19,996 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 11:16:19,996 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 11:16:19,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 11:16:19,997 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 11:16:19,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 11:16:19,999 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 11:16:20,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 11:16:20,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 11:16:20,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 11:16:20,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 11:16:20,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 11:16:20,001 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 11:16:20,001 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 11:16:20,001 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 11:16:20,002 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 11:16:20,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 11:16:20,002 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 11:16:20,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 11:16:20,003 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 11:16:20,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 11:16:20,003 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 11:16:20,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:20,004 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 11:16:20,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 11:16:20,004 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 11:16:20,005 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 11:16:20,005 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 11:16:20,005 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 11:16:20,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 11:16:20,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 11:16:20,006 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_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d1375e0884273e701688a9a8eac55476ef970fe83c7d545ad9af0603bce9da2 [2021-10-24 11:16:20,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 11:16:20,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 11:16:20,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 11:16:20,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 11:16:20,498 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 11:16:20,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c [2021-10-24 11:16:20,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/8cb067063/3938ba06ae0440eeb007341360a9d1df/FLAG125f39a92 [2021-10-24 11:16:21,126 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 11:16:21,131 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c [2021-10-24 11:16:21,138 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/8cb067063/3938ba06ae0440eeb007341360a9d1df/FLAG125f39a92 [2021-10-24 11:16:21,512 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/data/8cb067063/3938ba06ae0440eeb007341360a9d1df [2021-10-24 11:16:21,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 11:16:21,516 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 11:16:21,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:21,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 11:16:21,537 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 11:16:21,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15ec34af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21, skipping insertion in model container [2021-10-24 11:16:21,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 11:16:21,571 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 11:16:21,707 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c[709,722] [2021-10-24 11:16:21,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:21,760 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 11:16:21,792 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/sv-benchmarks/c/nla-digbench-scaling/freire2_unwindbound100.c[709,722] [2021-10-24 11:16:21,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 11:16:21,840 INFO L208 MainTranslator]: Completed translation [2021-10-24 11:16:21,840 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21 WrapperNode [2021-10-24 11:16:21,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 11:16:21,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:21,857 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 11:16:21,857 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 11:16:21,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,907 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 11:16:21,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 11:16:21,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 11:16:21,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 11:16:21,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,949 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,953 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,969 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 11:16:21,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 11:16:21,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 11:16:21,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 11:16:21,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (1/1) ... [2021-10-24 11:16:21,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 11:16:21,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 11:16:22,014 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 11:16:22,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 11:16:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 11:16:22,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 11:16:22,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 11:16:22,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 11:16:33,714 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 11:16:33,714 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-24 11:16:33,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:33 BoogieIcfgContainer [2021-10-24 11:16:33,717 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 11:16:33,720 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 11:16:33,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 11:16:33,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 11:16:33,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:16:21" (1/3) ... [2021-10-24 11:16:33,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5591d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:33, skipping insertion in model container [2021-10-24 11:16:33,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:16:21" (2/3) ... [2021-10-24 11:16:33,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b5591d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:16:33, skipping insertion in model container [2021-10-24 11:16:33,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:33" (3/3) ... [2021-10-24 11:16:33,727 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_unwindbound100.c [2021-10-24 11:16:33,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 11:16:33,733 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-24 11:16:33,782 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 11:16:33,799 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 11:16:33,799 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-24 11:16:33,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:33,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:16:33,819 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:33,819 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:16:33,820 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:16:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:33,826 INFO L82 PathProgramCache]: Analyzing trace with hash 890922791, now seen corresponding path program 1 times [2021-10-24 11:16:33,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:16:33,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732497339] [2021-10-24 11:16:33,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:33,839 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:16:33,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:16:33,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:16:33,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 11:16:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:34,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-24 11:16:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:16:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:34,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:16:34,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:34,188 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:16:34,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732497339] [2021-10-24 11:16:34,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732497339] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:34,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:34,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-24 11:16:34,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174378479] [2021-10-24 11:16:34,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 11:16:34,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:16:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 11:16:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:34,218 INFO L87 Difference]: Start difference. First operand has 32 states, 25 states have (on average 1.6) internal successors, (40), 31 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:34,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:16:34,238 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2021-10-24 11:16:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 11:16:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 11:16:34,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:16:34,249 INFO L225 Difference]: With dead ends: 62 [2021-10-24 11:16:34,249 INFO L226 Difference]: Without dead ends: 28 [2021-10-24 11:16:34,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 11:16:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-24 11:16:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-24 11:16:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-24 11:16:34,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 6 [2021-10-24 11:16:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:16:34,293 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-24 11:16:34,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:16:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-24 11:16:34,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 11:16:34,294 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:16:34,294 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 11:16:34,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-24 11:16:34,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:16:34,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:16:34,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:16:34,513 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2021-10-24 11:16:34,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:16:34,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1506877513] [2021-10-24 11:16:34,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:16:34,515 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:16:34,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:16:34,516 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:16:34,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 11:16:34,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:16:34,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:16:34,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:16:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:35,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:16:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:16:45,090 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:16:45,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1506877513] [2021-10-24 11:16:45,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1506877513] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:16:45,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:16:45,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-24 11:16:45,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378547157] [2021-10-24 11:16:45,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-24 11:16:45,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:16:45,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-24 11:16:45,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:16:45,094 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:05,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:17:05,109 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-24 11:17:05,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:17:05,110 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 11:17:05,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:17:05,111 INFO L225 Difference]: With dead ends: 39 [2021-10-24 11:17:05,111 INFO L226 Difference]: Without dead ends: 35 [2021-10-24 11:17:05,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 7620.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-10-24 11:17:05,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-24 11:17:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-24 11:17:05,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:05,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-10-24 11:17:05,120 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 6 [2021-10-24 11:17:05,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:17:05,120 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-10-24 11:17:05,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:05,121 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-10-24 11:17:05,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 11:17:05,122 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:17:05,122 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:17:05,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-24 11:17:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:17:05,330 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:17:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:17:05,331 INFO L82 PathProgramCache]: Analyzing trace with hash 179657965, now seen corresponding path program 1 times [2021-10-24 11:17:05,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:17:05,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790109697] [2021-10-24 11:17:05,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:17:05,332 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:17:05,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:17:05,334 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:17:05,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 11:17:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:17:06,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-24 11:17:06,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:17:08,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:17:08,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:17:14,593 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from false [2021-10-24 11:17:16,633 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from true [2021-10-24 11:17:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:17:37,624 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:17:37,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790109697] [2021-10-24 11:17:37,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790109697] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:17:37,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:17:37,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-10-24 11:17:37,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339469880] [2021-10-24 11:17:37,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 11:17:37,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:17:37,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 11:17:37,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=30, Unknown=2, NotChecked=10, Total=56 [2021-10-24 11:17:37,627 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:17:49,250 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven) (forall ((v_ULTIMATE.start_main_~a~0_11 (_ FloatingPoint 11 53))) (= ((_ fp.to_sbv 32) roundTowardZero (let ((.cse1 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) v_ULTIMATE.start_main_~a~0_11))) (fp.sub c_currentRoundingMode .cse1 .cse1))) (_ bv0 32)))) is different from true [2021-10-24 11:17:52,247 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-10-24 11:18:46,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:18:46,971 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2021-10-24 11:18:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 11:18:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 11:18:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:18:46,972 INFO L225 Difference]: With dead ends: 36 [2021-10-24 11:18:46,973 INFO L226 Difference]: Without dead ends: 33 [2021-10-24 11:18:46,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 24473.8ms TimeCoverageRelationStatistics Valid=26, Invalid=54, Unknown=4, NotChecked=48, Total=132 [2021-10-24 11:18:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-24 11:18:46,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-10-24 11:18:46,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:18:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-10-24 11:18:46,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 8 [2021-10-24 11:18:46,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:18:46,982 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-10-24 11:18:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:18:46,982 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-10-24 11:18:46,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-24 11:18:46,983 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:18:46,983 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:18:47,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 11:18:47,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:18:47,198 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:18:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:18:47,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1248817364, now seen corresponding path program 1 times [2021-10-24 11:18:47,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:18:47,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592618574] [2021-10-24 11:18:47,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:18:47,199 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:18:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:18:47,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:18:47,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 11:18:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 11:18:47,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 11:18:47,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 11:18:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:18:47,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 11:18:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 11:18:47,929 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 11:18:47,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592618574] [2021-10-24 11:18:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592618574] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 11:18:47,930 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 11:18:47,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 11:18:47,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102883555] [2021-10-24 11:18:47,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 11:18:47,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 11:18:47,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 11:18:47,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 11:18:47,931 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:18:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 11:18:48,914 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-10-24 11:18:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 11:18:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-24 11:18:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 11:18:48,916 INFO L225 Difference]: With dead ends: 64 [2021-10-24 11:18:48,917 INFO L226 Difference]: Without dead ends: 50 [2021-10-24 11:18:48,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 213.5ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-24 11:18:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-24 11:18:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 36. [2021-10-24 11:18:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 35 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:18:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-10-24 11:18:48,926 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 9 [2021-10-24 11:18:48,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 11:18:48,940 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-10-24 11:18:48,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 11:18:48,941 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-10-24 11:18:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 11:18:48,941 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 11:18:48,941 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 11:18:48,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-10-24 11:18:49,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:18:49,142 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-10-24 11:18:49,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 11:18:49,142 INFO L82 PathProgramCache]: Analyzing trace with hash 852768432, now seen corresponding path program 1 times [2021-10-24 11:18:49,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 11:18:49,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931136726] [2021-10-24 11:18:49,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 11:18:49,143 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 11:18:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 11:18:49,144 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 11:18:49,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 11:18:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:18:50,702 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 11:18:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 11:18:52,920 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 11:18:52,920 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 11:18:52,921 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,924 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 11:18:52,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 11:18:53,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 11:18:53,130 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 11:18:53,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:18:53 BoogieIcfgContainer [2021-10-24 11:18:53,161 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 11:18:53,162 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 11:18:53,170 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 11:18:53,170 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 11:18:53,171 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:16:33" (3/4) ... [2021-10-24 11:18:53,173 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 11:18:53,242 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 11:18:53,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 11:18:53,246 INFO L168 Benchmark]: Toolchain (without parser) took 151726.62 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 34.7 MB in the beginning and 45.8 MB in the end (delta: -11.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-24 11:18:53,253 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:18:53,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 308.00 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 34.5 MB in the beginning and 56.8 MB in the end (delta: -22.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:18:53,254 INFO L168 Benchmark]: Boogie Procedure Inliner took 64.83 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:18:53,255 INFO L168 Benchmark]: Boogie Preprocessor took 61.62 ms. Allocated memory is still 73.4 MB. Free memory was 55.1 MB in the beginning and 53.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:18:53,255 INFO L168 Benchmark]: RCFGBuilder took 11746.72 ms. Allocated memory is still 73.4 MB. Free memory was 53.7 MB in the beginning and 42.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-24 11:18:53,256 INFO L168 Benchmark]: TraceAbstraction took 139441.50 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 47.9 MB in the end (delta: -6.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 11:18:53,257 INFO L168 Benchmark]: Witness Printer took 80.05 ms. Allocated memory is still 73.4 MB. Free memory was 47.9 MB in the beginning and 45.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 11:18:53,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 56.6 MB. Free memory was 37.6 MB in the beginning and 37.6 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 308.00 ms. Allocated memory was 56.6 MB in the beginning and 73.4 MB in the end (delta: 16.8 MB). Free memory was 34.5 MB in the beginning and 56.8 MB in the end (delta: -22.3 MB). Peak memory consumption was 14.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 64.83 ms. Allocated memory is still 73.4 MB. Free memory was 56.8 MB in the beginning and 55.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.62 ms. Allocated memory is still 73.4 MB. Free memory was 55.1 MB in the beginning and 53.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 11746.72 ms. Allocated memory is still 73.4 MB. Free memory was 53.7 MB in the beginning and 42.3 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 139441.50 ms. Allocated memory is still 73.4 MB. Free memory was 41.9 MB in the beginning and 47.9 MB in the end (delta: -6.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 80.05 ms. Allocated memory is still 73.4 MB. Free memory was 47.9 MB in the beginning and 45.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L24] int counter = 0; VAL [counter=0] [L26] int r; [L27] double a, x, s; [L28] a = __VERIFIER_nondet_double() [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [counter=0] [L33] EXPR counter++ VAL [counter=1] [L33] COND TRUE counter++<100 [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND FALSE !(!(cond)) VAL [counter=1] [L17] COND TRUE !(cond) VAL [counter=1] [L19] reach_error() VAL [counter=1] - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 139348.0ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 11.4ms, AutomataDifference: 90408.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 104 SDtfs, 68 SDslu, 171 SDs, 0 SdLazy, 111 SolverSat, 21 SolverUnsat, 24 SolverUnknown, 0 SolverNotchecked, 75148.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 32307.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 49.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 18 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.3ms SsaConstructionTime, 3478.1ms SatisfiabilityAnalysisTime, 41789.7ms InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 50 ConstructedInterpolants, 1 QuantifiedInterpolants, 320 SizeOfPredicates, 10 NumberOfNonLiveVariables, 140 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 11:18:53,489 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-10-24 11:18:53,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_01ce8d02-aef9-45f8-9133-ed86e5465a05/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...