./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH --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 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:10:43,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:10:43,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:10:43,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:10:43,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:10:43,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:10:43,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:10:43,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:10:43,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:10:43,820 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:10:43,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:10:43,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:10:43,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:10:43,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:10:43,829 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:10:43,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:10:43,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:10:43,841 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:10:43,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:10:43,851 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:10:43,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:10:43,856 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:10:43,860 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:10:43,861 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:10:43,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:10:43,876 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:10:43,876 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:10:43,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:10:43,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:10:43,882 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:10:43,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:10:43,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:10:43,887 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:10:43,888 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:10:43,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:10:43,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:10:43,891 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:10:43,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:10:43,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:10:43,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:10:43,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:10:43,895 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:10:43,953 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:10:43,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:10:43,955 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:10:43,955 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:10:43,956 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:10:43,956 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:10:43,956 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:10:43,956 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:10:43,964 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:10:43,964 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:10:43,965 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:10:43,966 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:10:43,966 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:10:43,966 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:10:43,967 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:10:43,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:10:43,968 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:10:43,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:10:43,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:10:43,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:10:43,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:10:43,969 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:10:43,969 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:10:43,970 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:10:43,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:10:43,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:10:43,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:10:43,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:10:43,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:10:43,971 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:10:43,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:10:43,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:10:43,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:10:43,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:10:43,973 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:10:43,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:10:43,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:10:43,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:10:43,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:10:43,974 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_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 260fe965b90ef3e416f91a3db2bee0bb860d5ab225efa939b96f89bde803836c [2021-11-03 05:10:44,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:10:44,334 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:10:44,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:10:44,338 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:10:44,339 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:10:44,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2021-11-03 05:10:44,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/data/5cc093bff/76c31c2a2a87466c869ef209e5d83726/FLAG0cec6e7c3 [2021-11-03 05:10:45,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:10:45,055 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c [2021-11-03 05:10:45,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/data/5cc093bff/76c31c2a2a87466c869ef209e5d83726/FLAG0cec6e7c3 [2021-11-03 05:10:45,360 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/data/5cc093bff/76c31c2a2a87466c869ef209e5d83726 [2021-11-03 05:10:45,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:10:45,365 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:10:45,367 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:45,368 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:10:45,372 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:10:45,373 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64b546f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45, skipping insertion in model container [2021-11-03 05:10:45,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,383 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:10:45,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:10:45,634 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_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2021-11-03 05:10:45,652 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:45,662 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:10:45,677 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_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/sv-benchmarks/c/nla-digbench-scaling/lcm2_unwindbound2.c[537,550] [2021-11-03 05:10:45,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:10:45,700 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:10:45,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45 WrapperNode [2021-11-03 05:10:45,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:10:45,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:10:45,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:10:45,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:10:45,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,718 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,744 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:10:45,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:10:45,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:10:45,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:10:45,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,773 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:10:45,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:10:45,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:10:45,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:10:45,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (1/1) ... [2021-11-03 05:10:45,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:10:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:10:45,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:10:45,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:10:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:10:45,896 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:10:45,898 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:10:45,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:10:46,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:10:46,467 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-11-03 05:10:46,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:46 BoogieIcfgContainer [2021-11-03 05:10:46,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:10:46,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:10:46,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:10:46,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:10:46,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:10:45" (1/3) ... [2021-11-03 05:10:46,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77667fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:46, skipping insertion in model container [2021-11-03 05:10:46,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:10:45" (2/3) ... [2021-11-03 05:10:46,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77667fa4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:10:46, skipping insertion in model container [2021-11-03 05:10:46,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:10:46" (3/3) ... [2021-11-03 05:10:46,487 INFO L111 eAbstractionObserver]: Analyzing ICFG lcm2_unwindbound2.c [2021-11-03 05:10:46,494 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:10:46,495 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 05:10:46,566 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:10:46,578 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 [2021-11-03 05:10:46,578 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 05:10:46,597 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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) [2021-11-03 05:10:46,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 05:10:46,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:46,607 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 05:10:46,608 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:46,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 118369670, now seen corresponding path program 1 times [2021-11-03 05:10:46,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:46,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195281119] [2021-11-03 05:10:46,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:46,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:46,793 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:10:46,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [859390496] [2021-11-03 05:10:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:46,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:10:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:10:46,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:10:46,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:10:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:10:46,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-03 05:10:46,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:10:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:47,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:10:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:10:47,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:10:47,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195281119] [2021-11-03 05:10:47,346 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-03 05:10:47,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859390496] [2021-11-03 05:10:47,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859390496] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:10:47,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:10:47,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-03 05:10:47,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47696276] [2021-11-03 05:10:47,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:10:47,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:10:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:10:47,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:10:47,373 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 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 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:49,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:10:49,505 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2021-11-03 05:10:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:10:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-03 05:10:49,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:10:49,517 INFO L225 Difference]: With dead ends: 37 [2021-11-03 05:10:49,517 INFO L226 Difference]: Without dead ends: 18 [2021-11-03 05:10:49,520 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:10:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-03 05:10:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2021-11-03 05:10:49,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 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) [2021-11-03 05:10:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-11-03 05:10:49,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-11-03 05:10:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:10:49,554 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-11-03 05:10:49,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:10:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-11-03 05:10:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 05:10:49,555 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:10:49,555 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-11-03 05:10:49,597 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 05:10:49,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-11-03 05:10:49,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:10:49,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:10:49,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1556947544, now seen corresponding path program 1 times [2021-11-03 05:10:49,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:10:49,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978220272] [2021-11-03 05:10:49,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:49,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:10:49,797 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-03 05:10:49,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212795417] [2021-11-03 05:10:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:10:49,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:10:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:10:49,819 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:10:49,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc85bc8a-a8c2-47a8-8f60-73ad2262a19f/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process