./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench/lcm2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench/lcm2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS --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 e0d433468442fea01fd6f51a5fcaea8db7e3b564878994442665eb482321c037 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:26:25,413 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:26:25,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:26:25,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:26:25,459 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:26:25,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:26:25,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:26:25,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:26:25,465 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:26:25,467 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:26:25,468 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:26:25,469 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:26:25,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:26:25,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:26:25,476 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:26:25,482 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:26:25,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:26:25,489 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:26:25,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:26:25,501 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:26:25,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:26:25,508 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:26:25,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:26:25,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:26:25,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:26:25,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:26:25,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:26:25,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:26:25,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:26:25,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:26:25,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:26:25,520 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:26:25,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:26:25,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:26:25,528 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:26:25,530 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:26:25,531 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:26:25,531 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:26:25,531 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:26:25,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:26:25,533 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:26:25,534 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:26:25,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:26:25,573 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:26:25,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:26:25,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:26:25,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:26:25,576 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:26:25,576 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:26:25,576 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:26:25,576 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:26:25,577 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:26:25,578 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:26:25,578 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:26:25,578 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:26:25,578 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:26:25,579 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:26:25,579 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:26:25,579 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:26:25,579 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:26:25,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:26:25,581 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:26:25,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:26:25,581 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:26:25,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:26:25,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:26:25,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:26:25,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:26:25,582 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:26:25,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:26:25,583 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:26:25,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:26:25,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:26:25,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:26:25,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:25,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:26:25,585 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:26:25,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:26:25,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:26:25,586 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:26:25,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:26:25,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:26:25,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:26:25,587 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0d433468442fea01fd6f51a5fcaea8db7e3b564878994442665eb482321c037 [2022-11-19 08:26:25,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:26:25,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:26:25,964 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:26:25,965 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:26:25,966 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:26:25,967 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/nla-digbench/lcm2.c [2022-11-19 08:26:26,043 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/data/d3173e0ac/813cefe6f81c4ea1980fc207b9ec62b8/FLAG62a68d72b [2022-11-19 08:26:26,570 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:26:26,571 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/sv-benchmarks/c/nla-digbench/lcm2.c [2022-11-19 08:26:26,579 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/data/d3173e0ac/813cefe6f81c4ea1980fc207b9ec62b8/FLAG62a68d72b [2022-11-19 08:26:26,934 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/data/d3173e0ac/813cefe6f81c4ea1980fc207b9ec62b8 [2022-11-19 08:26:26,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:26:26,939 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:26:26,943 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:26,943 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:26:26,947 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:26:26,948 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d23765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:26, skipping insertion in model container [2022-11-19 08:26:26,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:26:26" (1/1) ... [2022-11-19 08:26:26,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:26:26,974 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:26:27,181 WARN L234 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_e7f1ed13-6281-4e27-a056-60cbe0acea39/sv-benchmarks/c/nla-digbench/lcm2.c[537,550] [2022-11-19 08:26:27,197 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:27,205 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:26:27,219 WARN L234 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_e7f1ed13-6281-4e27-a056-60cbe0acea39/sv-benchmarks/c/nla-digbench/lcm2.c[537,550] [2022-11-19 08:26:27,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:26:27,243 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:26:27,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27 WrapperNode [2022-11-19 08:26:27,244 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:26:27,245 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:27,245 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:26:27,245 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:26:27,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,261 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,277 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2022-11-19 08:26:27,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:26:27,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:26:27,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:26:27,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:26:27,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,293 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,298 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:26:27,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:26:27,301 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:26:27,301 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:26:27,302 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (1/1) ... [2022-11-19 08:26:27,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:26:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:27,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:26:27,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:26:27,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:26:27,370 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 08:26:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 08:26:27,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:26:27,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:26:27,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:26:27,370 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 08:26:27,371 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 08:26:27,433 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:26:27,436 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:26:27,644 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:26:27,679 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:26:27,680 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 08:26:27,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:27 BoogieIcfgContainer [2022-11-19 08:26:27,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:26:27,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:26:27,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:26:27,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:26:27,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:26:26" (1/3) ... [2022-11-19 08:26:27,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336d4f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:27, skipping insertion in model container [2022-11-19 08:26:27,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:26:27" (2/3) ... [2022-11-19 08:26:27,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@336d4f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:26:27, skipping insertion in model container [2022-11-19 08:26:27,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:26:27" (3/3) ... [2022-11-19 08:26:27,701 INFO L112 eAbstractionObserver]: Analyzing ICFG lcm2.c [2022-11-19 08:26:27,736 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:26:27,737 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:26:27,820 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:26:27,827 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@edc28d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:26:27,827 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:26:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:26:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:26:27,854 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:27,855 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:27,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:27,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1126131708, now seen corresponding path program 1 times [2022-11-19 08:26:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:27,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416619607] [2022-11-19 08:26:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:27,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:28,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:28,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006281225] [2022-11-19 08:26:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:28,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:28,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:28,083 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:28,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:26:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:26:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:26:28,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:26:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-19 08:26:28,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:26:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 08:26:28,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:26:28,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416619607] [2022-11-19 08:26:28,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-19 08:26:28,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006281225] [2022-11-19 08:26:28,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006281225] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-19 08:26:28,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:26:28,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-11-19 08:26:28,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931525115] [2022-11-19 08:26:28,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:26:28,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:26:28,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:26:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:26:28,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:26:28,717 INFO L87 Difference]: Start difference. First operand has 20 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:26:30,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-19 08:26:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:26:30,922 INFO L93 Difference]: Finished difference Result 42 states and 58 transitions. [2022-11-19 08:26:30,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:26:30,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 19 [2022-11-19 08:26:30,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:26:30,933 INFO L225 Difference]: With dead ends: 42 [2022-11-19 08:26:30,933 INFO L226 Difference]: Without dead ends: 25 [2022-11-19 08:26:30,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:26:30,940 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:26:30,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 56 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-11-19 08:26:30,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-19 08:26:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-19 08:26:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:26:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-19 08:26:31,001 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 19 [2022-11-19 08:26:31,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:26:31,001 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-19 08:26:31,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-19 08:26:31,002 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-19 08:26:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 08:26:31,004 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:26:31,004 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:26:31,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:26:31,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-19 08:26:31,210 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:26:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:26:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash 810966484, now seen corresponding path program 1 times [2022-11-19 08:26:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:26:31,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490483515] [2022-11-19 08:26:31,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:31,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:26:31,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-19 08:26:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694549748] [2022-11-19 08:26:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:26:31,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:26:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:26:31,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:26:31,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7f1ed13-6281-4e27-a056-60cbe0acea39/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process